Brooklyn neighbourhoods are full of life, which also means traffic, buses, sirens, music and construction just outside the window. Many older homes still have single pane windows or worn replacements that let in noise, winter drafts and summer heat. Upgrading windows can make your home quieter, warmer and more efficient, while improving the look of your facade. In a city with historic districts, co op boards and strict building codes, it also takes careful planning. Here is what to know.
In this guide
- Understand how windows affect noise and comfort
- Compare glass and frame options for city homes
- Know when Landmarks approval may be needed
- Plan installation in occupied buildings
Why Windows Matter So Much
Windows are often the weakest part of a wall when it comes to sound and heat. Thin glass and gaps around sashes allow noise and air to pass through easily. In older brownstones and apartment buildings, windows may be decades old, with worn weatherstripping, broken sash cords and loose frames. Upgrading them can make a dramatic difference in comfort.
How Glass Reduces Noise
Double pane insulated glass reduces noise compared with single panes, but the details matter. Laminated glass, which bonds layers of glass to an inner layer, is particularly effective at dampening sound. Using panes of different thicknesses in the same unit helps block a wider range of noise frequencies. Ask about sound ratings when comparing windows if noise is a priority.
Even the best glass will not stop noise if air leaks around the frame. Careful installation and sealing are as important as the window itself.
Energy Efficiency
Low emissivity coatings reflect heat back into the room in winter and keep summer heat out. Insulated frames and warm edge spacers reduce drafts and condensation. In buildings with radiators that are hard to control, better windows help keep rooms at a steady, comfortable temperature.
Frame Materials for City Homes
Wood windows suit brownstones and historic buildings and can be made to match original profiles. Aluminium clad wood combines a classic interior with a durable exterior. Fibreglass is strong and stable, while vinyl is affordable and low maintenance, though it may not be allowed on some historic facades. Your choice may be guided by building rules and Landmarks requirements.
The quietest room in the house often starts with the right window.
Historic Districts and Landmarks Review
Many Brooklyn neighbourhoods, including Prospect Heights, Park Slope and Fort Greene, include historic districts. Replacing windows on facades visible from the street in these areas generally requires approval from the Landmarks Preservation Commission. Approved windows often need to match the original materials, configuration and profiles. Rear windows not visible from the street may have more flexibility. A contractor experienced with Landmarks applications can prepare the required drawings and specifications.
Co Op and Condo Rules
In apartment buildings, windows may be the responsibility of the building rather than the owner, and many buildings require a uniform appearance. Check your proprietary lease or bylaws, and expect to submit an alteration agreement and product information to the board or managing agent.
Interior Storm Windows
If replacing windows is not possible or not allowed, interior storm windows can dramatically reduce noise and drafts. These panels fit inside the existing window opening and are nearly invisible from the street, making them popular in landmarked buildings and rentals. Some are designed specifically for sound reduction.
Safety Requirements
In the city, window guards are required in apartments where young children live, and windows must not block required fire escape access. When replacing windows, make sure new units are compatible with window guards and fire escape requirements. Your contractor should understand these rules.
If you use window air conditioners, discuss sleeves, brackets or alternative cooling options before choosing new windows.
Installation in Occupied Homes
Most window replacements in brownstones and apartments are completed from the inside, one opening at a time. Crews protect floors and furniture, remove old units, prepare openings, install and seal new windows and finish trim. Ask how long each room will be affected and how debris will be carried out, especially in walk up buildings.
Permits and Licences
Depending on the building and scope, window work may require permits from the Department of Buildings in addition to Landmarks or board approvals. In the city, home improvement contractors must hold a licence from the Department of Consumer and Worker Protection. Always confirm licences and insurance before signing a contract.
Restoring Original Windows
In some brownstones, original wood windows can be restored rather than replaced. Repairing rot, replacing sash cords, reglazing glass and adding weatherstripping can make old windows work smoothly again. Paired with interior storm windows, restored originals can perform surprisingly well while keeping historic character intact.
Choosing Window Styles
Double hung windows are traditional in brownstones and pre war buildings. Casement windows seal tightly and suit some modern renovations and rear facades. Tilt and turn windows, popular in newer construction, allow easy cleaning from the inside, which is helpful in upper floor apartments. Your building and the Landmarks rules may guide which styles are allowed.
Light, Views and Privacy
New windows are an opportunity to improve daylight and views. Narrow frames maximise glass area, while low emissivity coatings protect furniture from fading. For street facing rooms, consider glass options or treatments that provide privacy without blocking light.
Questions to Ask Before You Buy
Ask which products are suitable for your building and historic district, what sound and energy ratings they carry and how the installer will handle approvals. Ask about lead times, warranties on glass, frames and installation and how long each room will be affected during the work.
Caring for New Windows
Clean tracks and sills regularly, especially in dusty city environments, and check weatherstripping and caulk each year. Wood windows need periodic painting to protect them from weather. With proper care, quality windows can provide comfort and quiet for decades.
Thinking About the Whole Wall
Windows are part of a wall system. Gaps around radiator covers, old air conditioner sleeves and unsealed trim also let in noise and drafts. Sealing these openings, adding insulation where possible and installing heavy lined curtains in bedrooms complement new windows and make rooms noticeably quieter and warmer.
Timing Your Project
Landmarks and board approvals, custom manufacturing and scheduling can take time. Spring and early autumn are comfortable seasons for installation, when open windows for a few hours are less of a hardship. Start planning early so new windows are in place before the heart of winter or the heat of summer.
Upgrade Your Windows With Perfect Nest Way
Perfect Nest Way helps Brooklyn homeowners choose and install quieter, warmer windows for brownstones, row houses and apartments. We prepare Landmarks and board submissions, coordinate permits and install with care. Contact us to schedule a window consultation.