Brooklyn
Window Restoration in Brooklyn
The brownstone borough — more historic districts than anywhere else in the city, and a housing stock full of original sash that earlier renovations sealed shut. We reopen them.
Where the brownstones are
Brooklyn Heights was designated in 1965 — New York City’s first historic district, and the precedent everything since has been measured against. Brooklyn now has more designated historic districts than any other borough, which is another way of saying it has more original window stock still on the buildings.
We work across Brooklyn Heights, Park Slope, Fort Greene, Clinton Hill, Cobble Hill, Carroll Gardens, Bedford-Stuyvesant and Prospect Heights. Most of it is rowhouse work, and most of it is owner-occupied — a single decision-maker rather than a board, which changes the pace of a project considerably.
It also means the buildings are small in Landmarks’ terms: six storeys or fewer and under 40 feet of frontage. That matters, because at a primary facade the material of a replacement window has to match the historic window on small buildings. The exception — small buildings historically fitted with one-over-one wood double-hungs may change material, though never to vinyl — is narrow, and worth knowing before anyone orders anything.
Italianate, Neo-Grec, Romanesque, Queen Anne
A Brooklyn rowhouse block is usually legible as a date range if you read the windows.
Italianate — the 1850s to 1870s brownstone, tall parlour-floor openings, often segmentally arched, with heavy projecting lintels and, originally, two-over-two double-hung sash. The two-over-two is the signature: a single vertical muntin dividing each sash, made possible by improvements in glass manufacture, and completely different in character from the six-over-six that preceded it.
Neo-Grec — 1870s to 1880s, flatter and more incised, with crisply cut stone ornament and window openings that tend towards square heads.
Romanesque Revival — 1880s to 1890s, rock-faced brownstone, deep round-arched openings, and windows whose arched heads have to be reproduced exactly or the whole facade reads wrong.
Queen Anne — the same period, but restless: bays, gables, terracotta panels, mixed materials, and windows in more than one configuration on a single facade, sometimes with small-paned upper sash over a single lower light.
On any of these, the arched and segmental heads are where replacement windows most obviously fail. A square-topped unit dropped into a curved opening with an infill panel above it is visible from across the street, and it will not pass a Landmarks review at a primary facade.
What we typically find behind the trim
The recurring Brooklyn condition is not decay. It is a working mechanism that somebody disabled.
Original two-over-two and one-over-one double-hungs across these neighbourhoods are frequently painted shut, and in an enormous number of houses the weight pockets were sealed during 1970s and 1980s renovations — cords cut, counterweights abandoned in the jambs, pocket covers plastered or panelled over, sometimes with the sash screwed to the frame for good measure. Occasionally the pockets were stuffed with insulation, which reads as an energy improvement and is in fact the reason the window no longer opens.
That is reversible. The pockets are reachable through the pocket covers, the weights are almost always still in there, and rebuilding the mechanism is standard work: pulleys freed or replaced in kind, cords or chains renewed, weights re-hung and rebalanced to the finished sash. The detail of how the mechanism works, and why abandoning it is the wrong repair, is set out on our wood window restoration page.
The other Brooklyn constant is paint. Successive coats bridge sash to frame and bury the profile the original joiner cut — so stripping is not only about getting to sound substrate, it is about recovering the shadow line that makes the facade read correctly.
Filing in a Brooklyn historic district
Rowhouse projects in a designated Brooklyn district almost always land on a Permit for Minor Work — staff-level review, in the region of ten business days once the application is complete, no public hearing. We have self-filed and been issued exactly that on a Carroll Gardens project, on a full-replacement scope across the building.
Worth knowing: the permit then runs for years, not months. That Carroll Gardens permit was issued in February 2026 and does not expire until 2030, so approval does not oblige you to start work on any particular schedule.
Also worth knowing, because it is where Brooklyn owners most often get caught: the rear elevation is still within Landmarks jurisdiction. The rules there are far looser — at a non-visible secondary facade there is no requirement to match material, operation or configuration at all — but "looser" is not "exempt", and a rear-yard window swap on a designated rowhouse still needs a filing.
Common Questions
Questions we get asked on this work
Our brownstone windows are painted shut and the sash cords were cut. Is that fixable?
Yes, and it is the single most common condition we find in Brooklyn. The counterweights are almost always still sitting in the jamb pockets, which are reachable through the pocket covers. Once the paint is stripped back and the joinery trued, the pulleys are freed or replaced in kind, new cords or chains are fitted and the weights are re-hung and rebalanced against the restored sash, so it holds position at any height again.
Do I need an LPC permit for windows at the back of my rowhouse?
Generally yes, a permit is still required — Landmarks jurisdiction covers the whole exterior of a designated building, not just the street front. What changes is how strict the rules are: at a non-visible secondary facade there is no requirement to match the historic material, operation or configuration, which gives you real flexibility on the rear that you do not have on the front.
Can I put vinyl windows in a Brooklyn historic district if they look like wood?
Not at the primary facade. Brooklyn rowhouses are small buildings in Landmarks’ terms — six storeys or fewer and under 40 feet of frontage — so the material has to match the historic window there. There is a narrow exception allowing small buildings that historically had one-over-one wood double-hungs to change material, but vinyl is specifically excluded from it.
How do you handle the arched openings on a Romanesque brownstone?
They are reproduced as arched units, not squared off. A flat-headed window dropped into a round-arched opening with a filler panel above is obvious from the street and will not satisfy a Landmarks review at a primary facade, where configuration and details have to match. Where the original sash survives, restoring it is usually the more straightforward route than reproducing the curve.
Free Assessment
Get a free on-site assessment.
We visit your building, inspect the windows one by one, discuss any board or Landmarks requirements, and walk you through the options — restoration, replacement and approvals. No cost, no obligation.