Everything You Need to Know About Landmark Renovations In NYC

After renovating a landmark townhome in Hudson Square and numerous other landmark buildings, we’ve got expertise in all the ways to properly navigate the landmark renovation process in NYC.

November 11, 2020

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Everything You Need to Know About Landmark Renovations In NYC

Landmark renovations may require specific considerations, but they're not necessarily complicated. Learn why via our guide on landmark renovations in New York City.

Table of contents

Brownstones, townhomes, and other apartment buildings designated as historic landmarks are often some of the most sought after pieces of real estate in New York City. From a landmark townhome in Hudson Square we gut renovated to numerous other landmark buildings, we’ve learned quite a few things about how to expertly navigate the landmark renovation process. Here’s everything you need to know and how we can help.

[#What]What Are Landmark Buildings?[#What]

Landmark buildings have historic features that often require special protection. With 149 historic districts and roughly 37,000 properties in landmark status, NYC residents have pretty good odds that landmark requirements will come into play if considering renovation.

These pre-war renovations differ from regular renovations, because - in addition to the standard permits and filings for the New York City Department of Buildings - they must also be overseen by the Landmarks Preservation Commission, or LPC. The LPC dictates what can and cannot be done in landmark renovations.

[#Why]Why Does A Landmark Designation Matter?[#Why]

The main reason landmark renovations matter is because they both affect and reflect the historic character of the street, neighborhood, and even district. When work will impact the look of the property and any element of the exterior, the proposed alterations must be reviewed and approved by the LPC.

If it’s visible from the street, the LPC specs it must meet!  

This includes the facade, concrete, windows, balconies, and even AC units. Windows and their surrounding architectural details define the style and character of buildings, so alterations to those are usually heavily scrutinized. Prior to any work, all plans and material specifications must be reviewed by the LPC, with the goal of retaining as much of the original as possible, matching the street’s preserved historic aesthetic.

Exterior renovation of Bed-Stuy brownstone. View full renovation before and after.

[#Approved]Does All Work Really Have To Be Approved?[#Approved]

Lots of work can’t be seen from the street, from interiors to work done on the back of the property. Even so, any alterations still must be reviewed by the LPC if working in a landmark building. If the updates truly leave no visible imprint, a certificate of no effect will be issued. This asserts that the project requires standard DOB permits, but does not directly impact the LPC.

In other words, not all landmark buildings require the same level of LPC filings. For instance, just because you live on a historic street, doesn’t necessarily mean that your renovation will automatically take longer or be more expensive due to the LPC.

[#Contested]What Actually Gets Contested?[#Contested]

Balcony renovations are commonly contested due to the simple fact they can seem totally obscured when they, in fact, are not. Townhomes or apartments with fourth or fifth-floor balconies may seem invisible from the street, but Eagle Eyes Eddie at the LPC will determine that a neighbor across the way can actually gaze directly upon said balcony. Some LPC decisions are final, but other times there are opportunities to get creative. Thankfully, a trusted design-build firm like Gallery will always go to bat on your behalf with the LPC and make the case for your particular design need - if we feel there’s a good argument.

[#Find]Find A Landmark Renovation Contractor In NYC[#Find] 

Moving into a landmark home soon and considering a renovation? A design-build firm that handles all the moving parts is always vital, but even more so when renovating a landmark property in NYC. At Gallery, we handle everything – the design work, Department of Buildings filings, LPC approval, etc. – to save you time and effort while preserving your gorgeous home’s beautiful historic legacy, all under one roof. For a sample of our work, view this Gut Renovation Of A Landmarked Townhome In Manhattan. Or, contact us today for a consultation.


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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.

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Pre-War Co-Op Renovation Asbestos: Key Facts (2026)
TopicKey Detail
Where asbestos is typically foundBehind walls — pipe insulation, steam risers, branch heating lines
Surface test resultsOften negative on walls and floors — hidden asbestos requires invasive investigation
Required NYC testingACP-5 clearance certificate required before DOB permit filing
ACP-5 testing cost$1,500–$4,000 depending on scope and number of samples
Abatement cost — typical scope$3,000–$15,000+ depending on linear footage and materials
Abatement cost — extensive scope$15,000–$40,000+ for full riser or branch line replacement
Timeline impact — proactive planningMinimal — when abatement is scoped and contracted in pre-construction
Timeline impact — reactive discovery2–6 weeks of unexpected delay mid-construction
Buildings most affectedPre-war co-ops built before 1940; especially those with original steam heat

Source: Gallery KBNY pre-war co-op renovation project data (2026)

Managing Partner/CEO

Avi Zikryhttps://www.gallerykbny.com/authors/avi-z

Avi Zikry is the CEO and managing partner of Gallery KBNY, a full service design-build firm specializing in the design and interior renovation of apartments, townhomes, and lofts in NYC. Under his leadership, Gallery KBNY has earned the reputation for delivering exceptional service and beautiful homes to our select group of clients. Avi's strategic positioning extends beyond the brand. He has strategically cultivated a network of industry partners and suppliers, forging strong alliances that allow Gallery KBNY to access cutting-edge technologies and materials. By staying abreast of industry trends and technological advancements, Avi ensures the firm remains at the forefront of innovation, consistently offering clients the latest design solutions and construction methodologies.