Upper West Side Co-Op & Condo Renovation Contractors

Renovating your condo and co-op on the Upper West Side The Gallery Way means working with a dedicated team that specializes in both property types. We navigate the complicated nuances of renovating NYC condos and co-ops on your behalf, plus know best practices for expediting board approval. We are committed to craftsmanship and impart each project with our built-in architectural and interior design services. With Gallery, customer satisfaction and breathtaking work are the bottom line.

New York City Co-Op & Condo Renovation

Award-Winning Co-Op & Condo Renovations In NYC

Co-op and condo renovations on the Upper West Side carry their own specific complexities. Co-op alteration agreements along Central Park West and West End Avenue are among the most rigorous in Manhattan, board approval timelines run 60 to 120 days, and pre-war buildings throughout the neighborhood bring infrastructure realities that require careful coordination with building engineers. As a full-service design-build firm working exclusively in Manhattan and Brooklyn, we handle every part of that process under one contract, whether the project is a Central Park West Beaux-Arts co-op, a Lincoln Square condo combination, a West End Avenue classic-six conversion, or a full gut renovation along Riverside Drive. Read our client reviews to see how that approach plays out in practice.

About Gallery KBNY

Gallery KBNY is an award-winning, full-service design-build firm specializing in the architecture, interior design, and renovation of apartments, co-ops, condominiums, townhomes, and lofts across Manhattan and Brooklyn. Our integrated team of architects, designers, contractors, and project managers — with a founding partner involved in every project — manages every phase from board approvals and DOB permitting through design and construction. Because architecture, design, permitting, and construction are coordinated under one roof, the process remains streamlined, accountable, and transparent from start to finish. Our work has been recognized by Forbes, The New York Times, Architectural Digest, and Inc., and we have received Houzz Best of Design & Service seven consecutive years, along with 100+ five-star client reviews.

Co-Op vs Condo

How A UWS Co-Op Renovation Differs From A UWS Condo Renovation

Owners often use "co-op" and "condo" interchangeably, but from a renovation standpoint the two are very different. Co-op buildings have an additional layer of approval and oversight that condos do not, and that single difference shapes timeline, scope, and cost more than almost any other variable. Below is each type broken out across the same seven dimensions for easy comparison.

Type 01

UWS Co-Op Renovation

Ownership Structure

Owner holds shares in a corporation that owns the building, plus a proprietary lease for the apartment. The corporation, governed by the board, controls every alteration.

Required Approval Document

Alteration Agreement, signed before any work begins. Outlines scope, materials, work hours, contractor insurance requirements, and deposit terms.

Board Approval Timeline

60 to 120 days for alteration agreement review and board approval. Pre-war buildings on Central Park West and West End Avenue run on the longer end of this range.

Engineer Review Scope

Building's reviewing engineer reviews architectural plans, MEP changes, and any work affecting the building's mechanical systems. Detailed back-and-forth is common.

Renovation Restrictions

Strict rules on plumbing relocations (wet-over-dry), allowed materials (often no hardwood in certain rooms), work hours (typically 9 to 4 weekdays), and noise.

Alteration Deposit Requirements

Refundable deposits between $10,000 and $50,000+ are common, held until final building sign-off. Some pre-war Central Park West addresses require deposits well above this range.

Typical UWS Examples

Pre-war co-ops along Central Park West, classic-six and classic-eight conversions on West End Avenue, Beaux-Arts buildings facing Central Park, and the most rigorous alteration regimes in the neighborhood.

Type 02

UWS Condo Renovation

Ownership Structure

Owner holds title to the apartment as real property, plus a percentage of the common elements. The condo association governs common areas but has lighter oversight of unit interiors.

Required Approval Document

Modification Agreement or House Rules acknowledgement. Generally lighter than a co-op alteration agreement, focused on protecting common areas during the renovation.

Board Approval Timeline

30 to 60 days for modification agreement and any required filings. Newer condos around Lincoln Square and the Riverside South corridor can sometimes move faster.

Engineer Review Scope

Building engineer review focuses on common-element impact and MEP integration. Less granular than co-op engineer reviews in most cases.

Renovation Restrictions

Wet-over-dry rules generally apply but are enforced less rigidly. Work-hour restrictions are similar but often more flexible. Material restrictions are lighter.

Alteration Deposit Requirements

Deposits when required are typically smaller and more standardized. Many UWS condos require only a flat administrative fee rather than a refundable deposit.

Typical UWS Examples

Modern luxury condos throughout Lincoln Square, post-war condo buildings along Broadway and Amsterdam, and converted condo addresses in the West 60s and 70s.

Benefits Of Renovating Your UWS Condo Or Co-Op With Gallery

Co-op and condo renovations succeed or fail on coordination. Architecture, interior design, alteration agreement compliance, board submissions, DOB filings, and construction all have to move in sync, and the gaps between them are where projects break down. Our design-build model puts every part of that work under one roof and one contract, with a single project manager accountable from initial walkthrough through final building sign-off.

More Streamlined Than Traditional General Contractors

The default search for "Upper West Side general contractor" returns mostly traditional design-bid-build firms, where the homeowner ends up coordinating between a separate architect, designer, and general contractor with no contractual obligation to each other. That coordination role is far more demanding than most owners anticipate, particularly when navigating CPW co-op alteration agreements where the building engineer scrutinizes every MEP change. Our design-build process consolidates every part of the project under one contract, eliminating handoff gaps and giving the homeowner a single point of accountability. For a deeper comparison, read Design-Build Vs General Contractor: What's The Difference?

NYC Co-Op & Condo Renovation


More Control And Lower Cost Than Independent Architects

The other common path is hiring an independent architect first, then bidding the construction out separately. This route gives the architect significant control over the design but typically delays the cost picture: full construction estimates only arrive after the architectural design phase, which can run four to six months. By that point, design decisions are locked in, and clients often discover the full scope of costs only after they've already invested heavily in plans. Our integrated approach delivers architecture, design, and construction estimating in parallel, so the budget picture is clear from the start. For a deeper look, read What Kind Of Architect Is Best For Your NYC Apartment Renovation?

Design-Build, The Ideal Approach To Condo Renovations On The Upper West Side

Design-build is the model that aligns most closely with how Upper West Side homeowners actually want to renovate: one accountable team, one contract, transparent pricing from the architectural phase forward, and a single point of contact through every approval and inspection. Benefits of design-build include:

Streamlined Communication

Five separate relationships become one. The homeowner has a single project manager who tracks design, board approvals, alteration agreement compliance, DOB filings, and construction, instead of coordinating between four or five outside parties themselves.

Welcomed Design Input

The architecture and interior design develop in parallel within the same firm, working from the same brief. Clients can be as involved as they want, from full mood boards to deferring to the design team's lead, with the design and construction teams aligned from day one.

Faster Project Completion

Not only are there less middle-men for clients to deal with in design-build renovations, all needed components being under one roof means every party is working in tandem towards the same goal from day one. This leads to proactive solutions earlier in the process, faster permitting and approvals, quicker response times between parties in pivotal points of the renovation, and ultimately a shorter delivery time for clients. After all, in Manhattan, there’s no time to waste.

Proactive Risk Management

The design-build umbrella of services not only expedites the move-in date, but having all needed services working in tandem early on in the process results in proactive problem solving and less change orders mid-way through the renovation. Without having these preliminary checks and balances in-house, details may fall through the cracks and issues common in older buildings may rear their ugly heads (IE: insufficient electrical capacity, hidden asbestos, outdated cloth wiring, etc).

Early Knowledge Of Costs

With all resources accounted for upfront, providing all-inclusive pricing for your full renovation is one of the most convenient benefits of design-build. This is especially beneficial considering most other methods of renovating provide staggered pricing, which can quickly become difficult to manage as the project proceeds.

Exclusive To New York City

While certain competitors aim to service various areas across the country, Gallery’s goal has always been to deliver the highest quality condo and co-op renovations in New York City. We don’t create stock kitchen templates and sell them via big box stores, or cater half our business around part of the country with a totally different climate. We deliver full-service, start-to-finish condo renovations, specifically for New Yorkers, built specifically around the specialized complexities our magnificent city has to offer. After all, why would we go anywhere else? 

All Elements Of Your UWS Condo & Co-Op Renovation Under One Roof

As a turnkey, full-service design-build firm, we are all-inclusive in our services. From start to finish, we do everything, including: architectural services, interior design, material selection and procurement, construction and site management, and all the NYC renovation nuances most of our clients never consider, such as permits, inspections, building board approvals, and if necessary, landmark applications.

We Don’t Work On A Change Order Model

We work exclusively in Manhattan and Brooklyn and understand how to navigate the complications required to renovate in a city with such rich history. Our proactive planning and due diligence allows us to provide a comprehensive budget and timeline that takes into account all nuances within your desired scope ahead of time to prevent any unforeseen changes down the line. Our proposals encompass the true full cost of the entire renovation from start to finish.

We Value Communication

From real-time project updates via our JobTracker app to ad hoc phone calls and site visits, we put extra emphasis on our communication with clients. Our projects have many moving parts, and clear communication is of the utmost importance to keeping your renovation on track.

The UWS Co-Op & Condo Renovation Process: What to Expect

Every Upper West Side co-op and condo renovation moves through the same phases, but the specifics shift dramatically based on building type. A pre-war Central Park West co-op alteration agreement is a different document than a Lincoln Square post-war condo's. A landmarked address within the UWS / Central Park West Historic District adds LPC review on top of standard DOB filings. Below is the end-to-end process we follow on every UWS project, with the points where building type changes the timeline called out specifically. For a comparison of the design-build approach versus the more traditional design-bid-build model, read Design-Build Vs Design-Bid-Build: What's The Difference?

PLANNING & PREP | Architectural Drawing And DOB Filings

Most condo renovations require architectural plans to be approved by the building board along with the NYC Dept of Buildings. We take on all architectural planning and filings with our award winning in-house design team and architects. Learn more about our architecture services.

PLANNING & PREP | Alteration Agreement

Co-op renovations on the Upper West Side are fairly regulated. Co-op boards have alteration agreements which impose rules around what is and isn’t allowed in terms of construction and renovation, including methods that can and can’t be used.

The alteration agreement essentially guides how we approach the project. This involves the following, among other things:


In order to push the formalities presented above, we strive to establish a good rapport with the super in every building we work in. We consistently earn the relationship, maintaining an open line of communication and collaboration to ensure as seamless of a working environment as possible. We will only do this in certain cases, we will petition your co-op board to make exceptions if we feel it’s a genuine and worthwhile possibility.

PLANNING & PREP | INSPECTIONS & TESTING

Since the average New York City apartment is around 90-years-old, there are often skeletons waiting to be uncovered when renovating. At Gallery, we prioritize all needed tests and inspections before any renovation can begin, in order to ensure no unwelcome surprises arise and delay our agreed-upon timeline. We handle all of the following on behalf of our clients:

  • Asbestos Test
  • Electrical Test
  • Plumbing Inspection

PLANNING & PREP | MATERIAL SELECTION + PROCUREMENT

The most hands-on aspect of any UWS condo renovation or co-op remodel is finding materials to bring your chosen interior design style to life. That entails paint color, accent walls, flooring style, mouldings, fixtures, countertops, and more. As a full-service design-build firm we take on the design, sourcing, and procurement of every permanent fixture in your home.

Plus, Gallery is brand-agnostic and vendor-agnostic, meaning we’re not limited in any way with our material selections. Some firms or contractors sell their own materials or have relationships with particular vendors, but our commitment is to our clients. We’ll procure from any vendor, whether international or local. This quality makes our ability to design for both taste and budget fairly flexible

Pre-war apartment renovation NYC

PLANNING & PREP | DESIGN RENDERS

After materials have been sourced, we create life-like digital renderings of the renovated apartment. This includes every aspect of the design, from flooring to fixtures, even showing how renovated rooms will look under different lighting settings. These high-end renderings provide a visual accompaniment to the blueprint that guides construction and helps clients tweak final design decisions like paint color or fixture height. The kitchen render to the right is from our Upper West Side Luxury Condo Renovation at Riverside Boulevard. See the completed kitchen directly below. Learn more about how our lifelike design renderings help clients visualize the interior design for their Upper West Side apartment renovation.

CONSTRUCTION & RENOVATION

Pre-war apartment renovation NYC

UWS Approval Stack

Five Approval Layers Behind A UWS Co-Op Or Condo Renovation

A UWS co-op or condo renovation is not one approval, it's a stack of approvals running partly in sequence and partly in parallel. Each layer has its own document, its own reviewer, and its own typical duration. Below is the full picture, including which layers apply to all UWS projects and which apply only to specific addresses.

Layer 01

Architectural Documentation Prep

applies to: all UWS projects

In-house architectural team produces the construction documents, MEP coordination drawings, and finish schedules required by every other downstream reviewer. Nothing else can begin until this package exists.

What's Prepared

Floor plans, elevations, MEP drawings, finish schedules, structural details, demolition plans.

Typical Duration

8 to 12 weeks for standard scope, longer for combinations or pre-war restoration work.

If It Stalls

Every other layer waits. Most often delayed by late client design decisions on layout or scope.

Layer 02

Building Engineer Review

applies to: most UWS co-ops and condos

The building's reviewing engineer (separate from the board) examines the drawings for structural feasibility, MEP impact on the building's systems, and compliance with the alteration agreement. Co-op engineer reviews are typically more granular than condo equivalents.

What's Submitted

Full architectural and MEP drawing set, scope-of-work narrative, contractor insurance certificates.

Typical Duration

3 to 6 weeks for first review, additional 2 to 4 weeks per round of revisions.

If It Stalls

Most often delayed by engineer comments requiring drawing revisions, particularly around riser stack relocations or wet-over-dry exceptions.

Layer 03

Co-Op or Condo Board Approval

applies to: all UWS co-ops; some UWS condos

Board reviews the alteration agreement (co-op) or modification agreement (condo) along with the engineer-approved drawings. Co-op boards on Central Park West and West End Avenue typically meet monthly, so calendar timing matters as much as document quality.

What's Submitted

Signed alteration or modification agreement, engineer-approved drawings, contractor and architect credentials, refundable deposit (co-ops).

Typical Duration

60 to 120 days for UWS pre-war co-ops, 30 to 60 days for most UWS condos.

If It Stalls

Boards may request scope reductions, additional contractor references, or higher refundable deposits, particularly on Central Park West addresses.

Layer 04

NYC DOB Filings & Permits

applies to: all UWS projects with structural / MEP / plumbing scope

NYC Department of Buildings filings cover structural changes, electrical, plumbing, and any work requiring a permit. Filings happen in parallel with board approval but can't be released until the building has signed off on the scope.

What's Submitted

PW-1 application, ALT-2 work permit filings, asbestos ACP-5/ACP-7, electrical and plumbing sub-permits.

Typical Duration

2 to 6 weeks for standard ALT-2 filings, longer for ALT-1 work involving structural changes.

If It Stalls

Most commonly stalled by objections requiring drawing revisions or by inspection scheduling at the front and back ends.

Layer 05 (When Applicable)

LPC Review

applies to: landmarked UWS addresses only

The Landmarks Preservation Commission reviews any work affecting protected exterior elements on landmarked addresses. The Upper West Side / Central Park West Historic District, the West End-Collegiate Historic District, and the Riverside-West End Historic District together cover significant portions of the UWS, so this layer applies to a meaningful share of pre-war projects throughout the neighborhood.

What's Submitted

LPC application, photographs, drawings of any affected exterior elements, materials samples where required.

Typical Duration

60 to 90 days for staff-level approvals, longer for full Commission hearings on substantial scope.

If It Stalls

Most commonly stalled by material substitution requirements (matching original brick, window profiles, or storefront elements).

Additional UWS Condo Renovation Services

Pre-war apartment renovation NYC

Pre-War Apartment Renovations

As experienced pre-war renovation contractors in New York City, Gallery KBNY helps our UWS clients turn their pre-war homes into masterpieces. We also know how much work is needed before each unveiling. Thanks to scattered ownership and inevitable decay, pre-war properties often require significant planning and renovation before they can meet their full and pristine potential. View our full portfolio of pre-war apartment renovations in NYC.

Pre-war apartment renovation NYC

Combining Two Condos

With a sole focus on NYC properties, we’re quite well-versed in what it takes to combine apartments – everything from how to approach the new layout to accounting for building codes, wet over dry restrictions, and communicating with co-op boards. View our full portfolio of apartment combinations in NYC.

Pre-war apartment renovation NYC

Room Creation

By focusing on residential renovations in New York City, our expertise includes any unique room customization imaginable. Whether you’re in need of additional bedrooms, a room that can serve as an office or a study, or a smaller room that can store your washer and dryer, we are experts in building new rooms in existing apartments.

Pre-war apartment renovation NYC

Full Gut Renovations

Our specialty is full-scale gut renovations of the various styles of residential homes that make up New York City. While full details on this extensive overhaul of your home are noted in our guide on Gut Renovations In New York City 101, the average full gut renovation to an Upper West Side condo with Gallery KBNY includes:

  • Full Kitchen Renovation (Fixtures, Appliances, Countertops, Backsplash, Island)
  • Multiple Bathroom Renovation (Fixtures, Shower/Bath, Vanity, Tiling & Ceramics)
  • Hardwood Flooring and/or Carpet Installation
  • Pre-War Restoration (Flooring, Framing, Moulding)
  • Custom Window Treatments + Fabrication/Installation
  • Paint Color + Wall Covering
  • Lighting + Electrical Fixture
  • Custom Carpentry (Cabinets, Closet Builds, Millwork, Finish Carpentry)
  • Integrated Smart Home Technology
  • Plumbing Selections
Pre-war apartment renovation NYC

Special Considerations For Condo & Co-Op Renovations

Often, special circumstances call for out of the box options. For this Upper West Side condo renovation in Manhattan, the client wanted a dedicated home office space but didn’t want to sacrifice her guest bedroom. For the best of both worlds, we created a Murphy Bed with custom millwork to blend the two options seamlessly, while also adding much needed storage.

Considering a Renovation in NYC?

Click to schedule a consultation with one of the principle partners at Gallery, who will hear out your renovation plans and let you know the best way to proceed - whether we end up working together or not.

Schedule Your Consultation

Client Testimonials & Reviews

We did an up/down apartment combo with Avi and his team and could not be happier. Their work was on time, on budget and very high quality. Having one firm handle everything was seamless and took so much of the stress surrounding logistics out of the process. We have done construction several times over the years and this was BY FAR the best experience we’ve had. Highly recommend. Our project manager, Miguel, was special. View The Project: https://www.gallerykbny.com/our-work/battery-park-townhouse-apartment-vertical-combination-328-albany-st

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We loved working with Avi and the whole team at Gallery Kitchen and Bath. From our very first meeting, we felt like we were in great hands. Avi is so responsive—always available, quick to come up with solutions, and he and his team helped us pivot whenever needed without losing momentum. Renovating in NYC is complicated, but they handled all the logistics seamlessly and made the process so much less stressful. They do everything—design, architectural work, and managing every detail and skilled trade needed for a full gut renovation of our loft apartment —so we never had to worry. They are in full control of their workers, which allows them to stay on track and adapt quickly. They were creative and helpful when we needed to pivot on design unexpectedly. We felt like we had true partners that genuinely cared about our project and our well being! The finished space truly exceeds our expectations—we are so proud of our beautiful new home. It’s hard to put into words how positive our experience was overall. We would not hesitate for a moment to recommend Avi and the entire team at Gallery. They will be our very first call if we ever need to renovate again in the future… and you should call right now if you’re considering a renovation! View The Renovation: https://www.gallerykbny.com/our-work/chelsea-co-op-renovation-107-w-25th-st

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VIEW OUR COMPLETED NYC APARTMENT RENOVATIONS

Pre-war apartment renovation NYC

Upper West Side Pre-War Co-Op Renovation | 801 West End Ave

When we were enlisted for this co-op renovation on the Upper West Side, the dated pre-war space needed some work. The family recently purchased the Manhattan home near Broadway with the intention of reinvigorating the spacious property without losing the historic charm. With a speciality in pre-war renovations in NYC, we were happily up for the challenge. View the full co-op renovation via our Before + After portfolio.

Pre-war apartment renovation NYC

Manhattan Apartment Renovation | 91 Central Park West

A recent project found us renovating a beautiful pre-war co-op apartment at 91 Central Park West. The building, established in 1929, was designed by famed NYC architectural firm Schwartz & Gross, whose work also includes The Mark Hotel and many of the Neo-Renaissance residential buildings along Fifth Avenue, Park Avenue, and Central Park West. Our client purchased the unit in solid shape but the unique layout required quite a bit of ingenuity to meet their specific needs which prioritized a commercial-quality kitchen, enhanced office space, along with various other upgrades that required a fine touch. View the full co-op renovation via our Before + After portfolio.

Common UWS Condo & Co-Op Renovation FAQs

How Much Does It Cost To Renovate A Condo Or Co-Op?

Upper West Side co-op and condo renovation costs depend on existing site conditions, scope, finish level, and building type. As a current rule of thumb for full apartment renovations on the Upper West Side: $400 to $550 per square foot for upper-mid-tier finishes, $550 to $850 per square foot for luxury finishes, and $700 plus per square foot for ultra-luxury work in pre-war addresses along Central Park West and West End Avenue, where original architectural restoration adds significant cost above the baseline. Pre-war buildings frequently surface hidden conditions during demolition (knob-and-tube wiring, asbestos, corroded cast-iron risers) that add to scope. For full details on condo renovation costs, read our blog How Much Does It Cost To Renovate A Condo In NYC?

How Long Does It Take To Renovate A Condo Or Co-Op On The Upper West Side?

Upper West Side co-op and condo renovation timelines vary based on building type, scope, and approval complexity. A realistic framing for a full two-bedroom co-op or condo renovation on the UWS:

  • Planning and approvals: 90 to 120 days for standard scope, longer for projects requiring architectural plans submitted to the building engineer and co-op board, and an additional 60 to 90 days for any work requiring LPC review on landmarked addresses (common throughout the Upper West Side / Central Park West Historic District and the West End-Collegiate Historic District).
  • Material procurement: 6 to 10 weeks active selection, with custom millwork and imported stone often running 12 to 20 weeks of lead time.
  • Construction: 5 to 7 months for a full two-bedroom renovation, longer for combinations, gut renovations of pre-war stock, or projects with significant structural reinforcement.

Pre-war buildings tend to add time on both ends: stricter alteration agreement review at the front end, and more discovery-driven scope changes during demolition. For more on typical timelines, read our breakdown in the NYC Apartment Renovation Guide.

What Is The Difference Between A Renovation And A Gut Renovation?

Typically, relatively smaller renovations or remodels involve design or interior adjustments, while gut renovations either require taking all rooms being renovated down to their studs and/or touching every inch of the home for a total overhaul of the space. For the full details of what a gut renovation in NYC entails read our guide on Gut Renovations In New York City 101.

Helpful NYC Condo Renovation Articles

Need more in-depth information on condo renovation topics? Our Design & Reno blog offers a massive collection of thoughtfully curated content from our designers & project managers. However, here are a few relevant articles to help aide your Upper West Side renovations:

Pre-war bedroom renovation NYC
Pre-war bedroom renovation NYC

Manhattan Design-Build

Pre-Purchase Renovation Assessment

Evaluate Your Manhattan Apartment
Before You Buy

Gallery KBNY is an award-winning, full-service design-build firm specializing in the architecture, design, and renovation of apartments, co-ops, condos, townhomes, and lofts across Manhattan and Brooklyn. Our in-house team — with a founding partner involved in every project — manages every phase from board approvals through construction. No outsourcing, no handoffs, no gaps in accountability.

As seen in

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★★★★★ 100+ Five-Star Reviews Best of Design & Service · 7 Years Running

Pre-Purchase Assessment

We conduct pre-purchase renovation assessments for buyers during the contract period. Walk the apartment with us before you commit — understand the full scope, cost, and timeline before closing.

or call us directly

Condo & Co-Op Renovation General Contractors In New York City

Co-op and condo renovations on the Upper West Side carry more moving parts than most homeowners anticipate. Alteration agreements, board approvals, building engineer reviews, DOB filings, LPC submissions on landmarked addresses, and construction all need to be coordinated, and the gap between them is where most projects lose time and money. Our full-service design-build approach consolidates every part of that work under one contract.Learn more about Gallery KBNY, or contact us for an initial consultation and walk-through of your UWS co-op or condo renovation.

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