Pre-War Apartment Renovation Contractors In New York City

As experienced pre-war apartment renovation contractors in New York City, Gallery KBNY specializes in transforming these storied spaces into modern homes while preserving their architectural integrity. From full-service design and planning to construction and board approvals, our team manages every detail—helping you unlock the full potential of your pre-war residence.

Pre-war apartment renovations NYC

Pre-War CONTRACTORS TRUSTED In
NEW YORK CITY

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.

10 to 16 Months
Consultation to move-in
$450 to $650/sq ft
Upper mid-tier to luxury
100+ Five-Star Reviews
Across Manhattan & Northern Brooklyn
Featured In
The New York Times & Architectural Digest

Boasting a premium locale and timeless historic charm, pre-war apartments remain among the city’s most coveted homes. Their century-old craftsmanship offers distinction rare in modern architecture, but that history comes with inevitable challenges. Aging infrastructure, scattered ownership, and complex building requirements often demand thoughtful planning and expert execution before these apartments can shine again. With Gallery’s proven process, your pre-war home can retain its character while being reimagined for contemporary living.

Pre-war apartment renovation Manhattan

What Is Involved In A NYC Pre-War Renovation?

PLANNING & PREP | Legalities & Logistics

Surprises when renovating a NYC apartment are common, but the chances issues may arise during inspection of a pre-war property in NYC are much higher. Due to their age, these seasoned properties typically have extensive owner history spanning 100 years-plus, making shotty handyman work or outdated materials likely and pre-reno inspections a must. We handle the following inspections, permits, and testing for our clients before any pre-war renovation in New York City:

Pre-war apartment renovation New York City
Pre-war condo renovation New York City
Before Demolition Begins Pre-War Diagnostic Testing And What Each Finding Means A century of ownership history leaves layers behind the walls. Each diagnostic below informs the architectural plans, the filing strategy, and the budget before demolition, keeping discoveries on the drawing board rather than on the job site.
Plumbing ProbeWet Areas
What It ExaminesSupply lines, branch piping, and waste connections at kitchens and baths, opened at targeted probe points.
Typical Pre-War FindingCorroded galvanized supply with narrowed flow and brittle branch lines hidden behind original tile.
How It Shapes The PlanReplacement scope is priced into the proposal, and wet room layouts are designed around riser locations from day one.
Asbestos SurveyACP-5 Filing
What It ExaminesPipe insulation, floor tile, mastic, and plaster sampled by a licensed investigator ahead of DOB filing.
Typical Pre-War FindingAsbestos-containing material at radiator lines and under mid-century flooring layered over original hardwood.
How It Shapes The PlanThe ACP-5 certification clears plans for filing. Scope is routed around undisturbed material where possible, and licensed abatement with air monitoring is scheduled where work requires it.
Electrical Load TestService Capacity
What It ExaminesPanel capacity, wiring type, and available building riser amperage against the proposed load.
Typical Pre-War FindingCloth-insulated wiring from the 1940s and 1950s, plus service sized before induction ranges and zoned climate systems.
How It Shapes The PlanRewiring and service upgrades enter the drawings early, and building management is engaged when riser capacity requires coordination.
Lead-Based Paint AssessmentPre-1978 Housing
What It ExaminesPainted surfaces at windows, doors, moldings, and friction points, which apply to nearly all pre-war stock.
Typical Pre-War FindingLead-bearing layers beneath decades of repainting, concentrated on original millwork and window systems.
How It Shapes The PlanEPA RRP-certified containment and dust control protocols are built into the production calendar, protecting both the household and the building's common areas.
Structural ProbingLayout Changes
What It ExaminesWall composition, beam locations, and slab conditions wherever the design opens or reconfigures the floor plan.
Typical Pre-War FindingTerracotta block partitions, concealed steel, and joists notched by a century of prior alteration work.
How It Shapes The PlanEngineer-stamped details for openings and reinforcement are resolved in drawings, which keeps board reviewing architects satisfied and change orders rare.
Gallery KBNY coordinates every diagnostic above during pre-construction, folding the findings into architectural drawings, DOB filings, and the all-in project price before demolition begins.

Plumbing Inspection

Corroded plumbing is a common discovery upon inspection of a pre-war home, especially those in estate condition. Typically previous owners weren't even aware of the issue, resulting in substantial corrosion. Replacing corroded plumbing will extend demolition timelines, but removal is a must before proceeding with renovations.

Asbestos Test

Testing for asbestos in the early planning stages is not only smart planning but often required in order to file architectural plans. As part of this process we plan for any added effort required for removal or see if there are workaround cost saving measures that can leave the asbestos undisturbed. By law, if work disturbs the asbestos, mitigation is required and bringing in an asbestos remediation company for asbestos removal and air quality monitoring is likely needed. However if preliminary tests confirm asbestos won’t be disturbed during the work, we’ll plan to avoid the area and issue altogether.

Electrical Test

There are two main reasons electrical tests are required before pre-war renovations. The first is to confirm there is no cloth wiring, which was common in the 40’s/50’s and will not pass inspection. The second is to ensure the electrical capacity of the apartment can handle the proposed electrical load requirements of the renovation - which isn’t always the case in older buildings.

Building, Electrical, and Plumbing Permits from Department Of Buildings

Navigating management companies, co-op boards, and city agencies can be a cumbersome process. As a full service design & build firm, we take on every aspect of the planning, approval,  and renovation process on our clients behalf. This includes the production and filing of all architectural plans along with obtaining all building, plumbing, and electrical permits. At times this also includes handling all landmarked related approvals.

In addition we also fully take on the approval process with the building management company and co-op board.

Landmark Applications via Landmark Preservation Commission (LPC)

A landmark approval is only needed if the property is designated a landmark or on a landmarked street). If landmark, the LPC must also approve all exterior street facing materials and design aesthetics prior to implementation, otherwise an LPC certificate of no effect is obtained.

Pre-war apartment renovation NYC

PLANNING & PREP | Architectural Drawing and DOB Filings

Our in-house architects meticulously plan and draft detailed architectural drawings tailored to your project needs, unique building codes, and specific challenges posed during inspections. From spatial planning to construction documentation, we ensure your designs are not only beautiful but also feasible and code-compliant. Read more on our architectural services and see how our fully-integrated architecture services differentiate from independent architects, who often prioritize their own design, leading to hidden costs and unsettled timelines. For more information on how our full-service approach separates itself from traditional ways of renovating, read What Kind Of Architect Is Best For Your NYC Apartment Renovation?

PLANNING & PREP | Interior Design

Settling on a design style before diving into the renovation is vital, so architectural plans can account for preference. Our end-to-end design-build process will help enhance your design goals by guiding them from fruition to execution by our award-winning in-house design team.

PLANNING & PREP | Material Selection + Procurement

The most hands-on aspect of any pre-war renovation is finding materials to bring the chosen interior design style to life. That entails paint color, accent walls, flooring, 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.

Pre-war apartment renovation NYC

PLANNING & PREP | Design Renders

Visualizing a finished space prior to breaking ground is essential for any well thought out design process. This is why we utilize life like 3D renderings that include every aspect of the design - down to the cabinet color and hardware. These high-end renderings provide a visual accompaniment to the blueprint that guides construction. The kitchen render above is from our Manhattan condo renovation at The Chelsea Mercantile on 252 Seventh Ave. The following image is the completed kitchen.

Learn more about how our lifelike design renderings help clients visualize the interior design for their pre-war apartment renovation in NYC.

CONSTRUCTION & RENOVATION

  • Demolition Phase
  • Initial Inspections
  • Framing & Rough Carpentry
  • Electrical & Plumbing
  • Finish Carpentry & Fixtures
  • Final Inspections & Walk-Through
Pre-war kitchen renovation New York City

Pre-War Apartment Renovation Timeline

Every pre-war apartment renovation timeline looks different. On average, expect timelines similar to these:

Renovation Timeline | Planning & Prep

In a pre-war renovation that doesn’t require building additional rooms or significantly restructuring the apartment, the planning process takes approximately 90-120 days. A common factor that can extend the planning phase is whether proposed renovation takes place in a landmarked building or whether the renovation requires architectural plans. In this scenario, the plans must first be submitted to the building's reviewing architect for approval.

Renovation Timeline | Construction & Construction Management

Every project is different and the respective timelines are impacted by the scope, site conditions and building rules. On average a full renovation of a classic 6, 7, or 8 apartment renovation takes 5-7 months although timelines can vary based on the specific factors.

Pre-War Layout Language The Classic 6, 7, And 8 Decoded Room counts in pre-war listings follow a formula set in the 1910s and 1920s: living room, formal dining room, kitchen, and bedrooms, with staff rooms counted separately. Each layout carries its own signature renovation opportunities.
Classic 6Roughly 1,400 to 1,800 SF
The FormulaLiving room, formal dining room, kitchen, two bedrooms, and a staff room off the kitchen, typically with a second bath.
Signature Renovation MovesConverting the staff room to a home office or laundry, opening the kitchen toward the dining room within structural limits, and creating a proper en-suite at the primary bedroom.
Classic 7Roughly 1,800 to 2,300 SF
The FormulaThe Classic 6 program plus a third bedroom, often arranged along a private gallery or center hall.
Signature Renovation MovesRebalancing bedroom wings for family living, adding bathrooms within wet-stack constraints, and restoring the gallery as the apartment's formal spine.
Classic 8Roughly 2,300 to 2,900 SF
The FormulaThree bedrooms plus a library or a second staff room, with generous formal rooms and multiple exposures.
Signature Renovation MovesReclaiming staff quarters as a butler's pantry or fourth bedroom, threading zoned climate systems through the larger footprint, and full restoration of original plasterwork and millwork.
Gallery KBNY's pre-war portfolio includes the Classic 8 at 255 West 108th Street and the Upper West Side co-op at 801 West End Avenue, both renovated with layouts reworked around the original formal plan.
Pre-war kitchen reno New York City
Pre-war kitchen renovation Manhattan

Costs of Pre-War Apartment Renovations

The cost of any renovation is dependent on existing site conditions, clients’ design aesthetics/preferences, and the actual scope of the project. A pre-war apartment is no different. However, a good rule of thumb for an entire pre war apartment renovation is $350-550 per square foot as an all in cost.

Pre-War Apartment Renovation Options

Our pre-war apartment renovation options are unlimited, meaning clients ultimately decide their needs based on preliminary design discussions. For example’s sake, a full pre-war apartment renovation in NYC may include:

  • Integrated Smart Home Technology
  • 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)
  • Plumbing Selections
Where The Budget Flows How A Pre-War Renovation Budget Typically Allocates Within the $350 to $550 per square foot all-in range, the distribution below reflects a typical full pre-war apartment renovation. Kitchens and baths carry the visible investment, while concealed systems and restoration work distinguish pre-war scopes from newer construction. Shown as a share of total budget on a scale of 30 percent.
Kitchen20 to 25%
Custom cabinetry, stone fabrication, appliance packages, and the structural work of opening the kitchen to adjacent rooms.
Concealed Systems18 to 24%
Rewiring, plumbing replacement, and HVAC threaded through original framing. This share runs higher in pre-war stock than in any newer building type.
Bathrooms15 to 20%
Full replacement of fixtures, waterproofing, tile, and vanities, with wet room positions coordinated against building risers.
Restoration And Millwork10 to 16%
Moldings, wainscoting, door and window restoration, and custom carpentry that carries the pre-war character through the new work.
Design, Architecture, And Filings10 to 15%
Architectural drawings, interior design, renderings, DOB and LPC filings, and board package preparation, handled in-house at Gallery KBNY.
Site Logistics And Protection8 to 12%
Building protection, insurance requirements, freight elevator scheduling, debris removal, and the delivery choreography dense pre-war blocks demand.
0% 10% 20% 30%
Shares shift with scope and finish level. Gallery KBNY prices the full allocation upfront through all-inclusive design-build proposals, so the distribution above is fixed before construction rather than discovered during it.
Pre-war bathroom renovation New York City
Pre-war apartment renovation NYC

Benefits Of Choosing Gallery For Your Pre-War Renovation In New York City

We use a consultative and partnership philosophy with our clients. As a design-build firm with expertise in pre-war apartment renovations in NYC, we offer budgetary insights to suggest priorities, helping find the middle ground between client goals and staying within budget.

More Streamlined Than Traditional General Contractors

While searching ‘general contractors in Manhattan’ may be the first route that comes to mind for your pre-war renovation in NYC, this age-old path to your dream home is not always the straightest. Hiring a traditional design-bid-build general contractor usually requires additional design support you must source and manage yourself, plus complicated permit and approval work most homeowners are unfamiliar with. For more information, read Design-Build Vs General Contractor: What’s The Difference?

More Control And Lower Cost Than Independent Architects

On the opposite end of the spectrum is an independent architect. Hiring an independent architect may result in less work for the client, but this route can also become a burdensome partnership. Since independent architects often act with their own interests in mind, clients get very little input in the design process and wind up paying exorbitant material costs for interior design that may not even suit their style. Plus, since independent architects outsource the construction, you’re often not seeing the full scope of costs until after designs are completed - which could take up to six months in some circumstances. For more information, read What Kind Of Architect Is Best For Your NYC Apartment Renovation?

Design-Build, The Ideal Approach To Pre-War Renovations In NYC

Working with a design-build general contractor in Manhattan is the closest clients get to their initial expectations when renovating in NYC. From the rapport and custom-first approach to the cost and timeline, design-build renovations are specifically meant to manage expectations by delivering a system that delivers them up front and executes every time. Benefits of design-build include: 

Streamlined Communication
Multiple relationships become one with design-build, making Manhattan renovations instantly easier for busy clients - who can now manage updates with one person instead of multiple. 

Welcomed Design Input
This two-way relationship also means clients can have as much or little design input as they prefer, building directly from their mood boards or partnering with their dedicated interior designer for a reinvigorated look fit for their Manhattan surroundings. 

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 in Manhattan operate with staggered pricing, which can quickly become difficult to manage as the project proceeds.

Examples Of Our Pre-War Renovations In New York City

Pre-war apartment renovation NYC

Manhattan Classic 8 Pre-war Apartment Renovation | 255 West 108th

Many elements of this Upper West Side pre-war apartment were entirely out of character with the historic charm inherent to the appeal of many pre-war apartments. To bring the entire space into design sync we crafted a transitional style to match the original details, refinishing and restoring the moldings and other fine details while bringing in modern touches where needed. View the full renovation via our before and after

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 character. With a speciality in pre-war renovations in NYC, we were happily up for the challenge. View the full pre-war renovation via our before and after.


Helpful Pre-War Renovation Articles

Looking for more information on pre-war renovations in New York City? Make time for these priority articles from our Design & Reno blog, which lend further pre-war expertise for your upcoming NYC renovation.

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

Common FAQS About Pre-War Renovations In New York City

How Is Payment Structured Throughout A Pre-War Apartment Renovation At Gallery KBNY?

Billed in stages tied to progress, an initial deposit, then payments at design completion, permit approval, and construction milestones. Our all-inclusive pricing means you know the full cost scope before committing.

Does The Renovation Process Or Timeline Change If My Pre-War Apartment Is In A Co-Op Versus A Condo?

Co-ops involve an added layer of board review plus obtaining a tentative tax lot number, which can add a few weeks to planning versus a condo. Once approvals are secured, the design/construction process is essentially identical under our model.

What Happens If I Want To Change The Scope Of My Renovation After Construction Has Started?

We document the request and share its cost/timeline impact before any work proceeds. Because one integrated team manages design, procurement, and construction, adjustments are typically resolved in days rather than the weeks it takes when separate firms have to coordinate.

Why A Design-Build Approach Is Ideal For Pre-War Renovations In NYC

Apartment renovations in New York City can be particularly challenging due to the multiple moving parts such as the various required approvals and the unique dynamics of working in older buildings. That statement goes double for pre-war apartments, which usually require additional technical work, planning, and a keen design eye to ensure the aesthetic never slips out of sync with the pre-war sensibility of the architecture. As a full service design & build firm, we streamline the entire design, planning, and renovation process under one roof.

If you are looking to renovate a pre-war apartment or brownstone in New York City, learn more about Gallery KBNY or contact us to leverage our full-service, design-build approach that will handle every aspect of the pre-war renovation process from start to finish.

New York City Design-Build

Pre-Purchase Renovation Assessment

Evaluate Your Pre-War 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.

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