Replacing Windows In Brooklyn Heights’ Historic District

Thinking about new windows in Brooklyn Heights? In a designated historic district, the right plan can save you time, money, and stress. In this guide, you’ll learn what the Landmarks Preservation Commission expects, which upgrades may skip permits, how to apply, and where incentives might help. Let’s dive in.

Know the rules in Brooklyn Heights

Brooklyn Heights is New York City’s first designated historic district, with many 19th-century rowhouses and distinctive window details. The Landmarks Preservation Commission (LPC) reviews most exterior changes in historic districts. Ordinary maintenance like replacing broken glass, repainting the same color, or caulking usually does not require LPC approval, but replacing windows or altering openings typically does. Review the LPC’s overview of permits to confirm your scope before you start work: Permits and Making Alterations.

Start with repair, not replacement

Federal preservation guidance emphasizes repair over replacement when possible. The National Park Service notes that adding weatherstripping and storm windows to existing sash can boost efficiency, sometimes approaching the performance of new units. See NPS guidance on evaluating windows for repair or replacement: NPS window evaluation.

Quick fixes that often avoid permits

Consider these steps first. They usually qualify as routine repair and help you keep original character while improving comfort.

• Reglaze and replace deteriorated putty.
• Repair wood sash and frames where feasible.
• Install modern weatherstripping designed for historic sash.
• Add interior or exterior storm windows sized to fit and minimize visual impact. For practical repair guidance, review the NPS rehabilitation guidelines: NPS window repair tips.

When replacement is necessary

If your windows are too deteriorated to repair, the LPC will expect replacements that preserve the building’s historic look.

What LPC expects

LPC rules require that new windows match the historic appearance in configuration, operation, details, profiles, and finish. You should document deterioration and explain why repair is not feasible. Get familiar with the LPC’s window rules in the NYC Rules, Section 2-14: LPC window rules.

Materials that work

For many small residential rowhouses, LPC may allow substitute materials like aluminum or fiberglass in some conditions, especially when replacing straight-headed, double-hung wood windows without divided lights. Vinyl sash is generally not acceptable on protected façades. Always retain or replicate historic brickmolds and keep the new sash in the same plane as the original. See details in the LPC rules: LPC window rules.

Visibility and profiles matter

LPC gives the most scrutiny to windows on primary street-facing elevations and any area visible from a public way. Pay close attention to sash setback, brickmold shape, sill and muntin proportions, and overall depth. Even small profile changes can alter the look and slow approvals.

How to apply and how long it takes

Most residential window replacements that follow LPC rules are reviewed at staff level. More visible or complex work can require a public hearing.

Step-by-step filing

• Confirm your building’s landmark status and which elevations are visible from public ways.
• Decide on repair vs replacement and document existing conditions.
• Apply through Portico, LPC’s online portal, which guides you to the correct permit type and required materials: Apply on Portico.
• Respond quickly to staff requests for additional photos, drawings, or a mock-up.

What to submit

Have these ready for a smoother review:

• Current façade photos and close-ups of each window.
• A window schedule with existing condition and proposed treatment.
• Measured elevations and shop drawings with profiles that show brickmolds and muntins.
• Product data, finish samples, and any historic evidence if you are restoring a prior configuration.
• A condition assessment explaining why repair is impracticable if you propose replacement.

Permit types and timelines

• Permit for Minor Work (PMW). Typical for compliant window replacements. LPC aims to decide within 20 business days from a complete submission, and many are approved faster. Learn more: PMW details.
• Certificate of Appropriateness (CofA). Required when the work does not meet staff rules or is highly visible. This involves a public hearing and can take about three months or more from filing to decision. See process: CofA overview.

PMWs are generally issued without fees, while CofAs and CNEs carry fees based on project cost. LPC permits must be posted at the site while work proceeds.

Avoid pitfalls and violations

Common issues that slow or block approvals include vinyl replacements, incorrect muntin profiles, changing window proportions, or moving sash out of plane. Installing storms that hide decorative trim can also prompt pushback.

Never start replacement work without checking LPC requirements. Unauthorized window removal can lead to warnings, fines, and required remediation. Review LPC’s enforcement page to understand the risks: Violations and enforcement.

Incentives and practical savings

If you own and live in a contributing historic home, you may qualify for the New York State Historic Homeownership Rehabilitation Credit. The credit equals 20% of qualified rehabilitation expenses, with minimum spend and exterior work requirements. Proposed window replacements must meet preservation standards, and vinyl is generally not acceptable. Review eligibility and rules here: NYS historic homeownership credit and the program overview from SHPO: Homeowner tax credit program.

For income-producing properties like rentals, a federal 20% rehabilitation tax credit may apply if the project meets the Secretary of the Interior’s Standards. Many owners also find that air sealing, storms, and weatherization deliver strong comfort and energy savings at lower cost.

Quick homeowner checklist

• Verify landmark status and which façades are visible from public ways.
• Try repair-first measures like reglazing, weatherstripping, and storm windows.
• If replacement is needed, select products that match profiles, sightlines, and finishes.
• Prepare a complete Portico application with photos, a window schedule, shop drawings, and product data: Apply on Portico.
• Plan for a PMW timeline of up to 20 business days when complete, or several months for a CofA.
• Keep permits on site and document the work as approved.
• Explore state tax credit eligibility before ordering windows.

Ready to plan your project in a New York minute? Whether you are prepping a brownstone to sell, managing a rental, or budgeting for a purchase in Brooklyn Heights, let a neighborhood-focused partner help you navigate historic rules while keeping your goals on track. Reach out to Nelson Aybar for clear next steps and local guidance.

FAQs

Do I need LPC approval to replace windows in the Brooklyn Heights Historic District?

• Yes. LPC reviews most exterior window replacements in historic districts, while routine maintenance like reglazing or same-color repainting often does not require approval.

How long does an LPC window permit take in Brooklyn Heights?

• Staff-level PMWs often take up to 20 business days from a complete submission. Projects that need a CofA and public hearing can take around three months or more.

Are vinyl windows allowed on landmarked façades in Brooklyn Heights?

• Vinyl sash is generally not acceptable on protected façades. LPC expects replacements to match historic appearance and details, including profiles and finishes.

What documentation should I include in my LPC window application?

• Provide façade and close-up photos, a window schedule, measured elevations, shop drawings with profiles, product data and finishes, and a condition assessment if you seek replacement.

Are there tax credits for window work in owner-occupied historic homes?

• You may qualify for the New York State Historic Homeownership Rehabilitation Credit, which can cover 20% of eligible costs if the work meets program rules and preservation standards.