Home Additions in Larchmont, NY

Westchester Home Addition Service Serving Larchmont

Rear extensions, second-floor additions and kitchen-family rooms for homes in the Village of Larchmont and Larchmont Manor, taken through the Code Compliance Worksheet, Planning Consultant and ARB.

Small Lots, Close Neighbors, Careful Rules

Larchmont is a village of early 20th-century homes on compact lots: Tudors, Colonials, shingle-style houses near the Manor and the Sound, and modest capes on the side streets. With most lots well under half an acre, an addition here is a negotiation with the floor area ratio, lot coverage and the setbacks, and with the neighbors a few feet away.

Start by confirming jurisdiction. Some homes with a Larchmont mailing address are in the unincorporated Town of Mamaroneck, which has its own rules. The Village’s Street Finder settles it, and this page covers the Village process.

The Village of Larchmont Path

1. Worksheet

Code Compliance Worksheet: gross floor area, coverage, setbacks and excavation, existing vs. proposed.

2. Planning Consultant

If Planning Board approval is needed, a meeting with the Planning Consultant first ($250).

3. Boards

Zoning Board, Planning Board and/or Architectural Review Board, with complete applications by the 2 p.m. deadline.

4. Building permit

Plans consistent with what the boards approved; review takes about three weeks.

5. Inspections

Phase inspections as listed on the permit, then a Builder’s Affidavit.

6. CC or CO

Certificate of Completion or Occupancy to legalize the finished work.

Larchmont Details That Affect an Addition

Floor area ratio

From 0.64 on lots up to 4,000 sq ft to 0.32 over 30,000 sq ft. Qualifying basement area may be exempt.

Board schedule

Planning Board, third Tuesday; ZBA, first Wednesday; ARB, last Wednesday. None meets in August.

Work hours

Weekdays 8 a.m.–7 p.m., Saturdays 9 a.m.–6 p.m., no audible power tools Sundays and holidays.

Insurance

The Village is named as additional insured on the contractor’s liability certificate.

License

A Westchester County home improvement license is filed with the application.

Windows

Window alterations go to the ARB; exact in-kind replacements don’t.

Additions That Work on Larchmont Lots

Second-floor additions. Building up over an existing first floor or garage when the lot has no room to spread.
Rear kitchen-family rooms. The most requested project, often with a mudroom tucked in.
Primary suites. Over a one-story wing, with a bath and walk-in closet.
Dormers. Turning an underused attic into bedrooms within the floor area allowance.

Because the Village’s work hours and close lot lines matter, we plan staging, deliveries and dust control with the neighbors in mind.

Larchmont Addition FAQs

How do I know if my addition needs a land use board in Larchmont?

The Village starts with a Code Compliance Worksheet comparing existing and proposed gross floor area, lot coverage, setbacks and excavation. If the results show you need Planning Board approval, you meet with the Village’s Planning Consultant (the fee is $250) before filing with the boards.

Does the Architectural Review Board see every addition?

The ARB reviews alterations and additions that change the building’s appearance, which covers nearly all additions. ARB approval isn’t a building permit; the Building Department still reviews the plans for code compliance afterward.

How big can an addition be?

The Village limits gross floor area with a floor area ratio that slides with lot size, from 0.64 on lots up to 4,000 square feet down to 0.32 on lots over 30,000 square feet, and some basement or cellar area may be exempt. We calculate where your house stands before design.

How long does Building Department review take after board approval?

The Village says about three weeks, depending on workload. The building permit must match the drawings the boards approved.

Planning an Addition in Larchmont?

Send us the address and what you need. We’ll run the floor area numbers and tell you which boards to expect.

Guardian Remodeling Corp · 143 Lake Shore Dr W, Carmel, NY 10512 · 914-912-0385 · Frank@guardianremodelingcorp.com