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R. Bradley Services

Nantucket Home Additions

We build additions for Nantucket homes, from primary suites and sunrooms to pool houses, guest houses and garage apartments. Our own carpenters handle the framing, trim and finish work so the new space sits correctly against the existing house.

Explore our recent Nantucket projects

Guest bedroom with blue accent wall, beadboard bed and a carved whale above the sofa

Wauwinet Guest House

Sliding shiplap closet doors face a reclaimed wood accent wall and pale pine flooring

Nantucket Custom Carpentry

Living room with a shiplap fireplace wall, rustic timber mantel and vaulted ceiling

Derrymore Rd. Residence

Additions we build on Nantucket

An addition is a build inside a house that is already standing, and that is a different job from starting on a bare lot. New framing has to meet existing structure, a new roofline has to look like it always belonged, and the family usually needs the rest of the house to stay usable while it happens. R. Bradley Builders takes on additions across Nantucket with our own carpenters doing the framing, trim and finish work.

Work we regularly take on:

  • Primary suite additions, including bedroom, bath and closets
  • Expanded kitchen and living space
  • Sunrooms and year-round porch conversions
  • Dormers and reworked rooflines
  • Mudrooms, entries and connectors
  • Pool houses and guest houses
  • Garage apartments
  • Decks, walkways and outdoor showers tied into the new work

What makes an addition on Nantucket different

Approvals come first. Nantucket is a National Historic Landmark District. Exterior architectural details across the island, including a new roofline, new windows and new sidewall shingling, are reviewed by the town’s Historic District Commission before work begins. Building permits are issued by the Town of Nantucket. We coordinate that process and keep you informed as it moves.

Matching the existing house. The detail that makes an addition invisible is the trim profile, the shingle exposure, the window casing and the roof pitch. Our carpenters do that work in house, which is the reliable way to get new work sitting correctly against an older island house.

Materials arrive by ferry. Lumber, windows, cabinetry and stone all come across on the boat, so ordering and staging sequence matters more here than on the mainland. We order early and work with long-established island suppliers including Island Lumber Company, Shepley and Stonewood Products.

Living through the work. Many island homes are occupied all summer, so a large share of addition work runs from autumn through spring. If your home is seasonal, tell us early and we will schedule around the months it sits empty.

Who does the work

Ronan Bradley trained through a four-year apprenticeship in Dublin and is certified by London City and Guilds. He worked on luxury homes across Ireland, Wales, Scotland and London before moving to Nantucket in 2010, and brings more than 30 years in the trade. He manages every project as general contractor and coordinates the other trades directly. R. Bradley Builders is a member of the Nantucket Builders Association and the Nantucket Island Chamber of Commerce.

Where we build additions

We build across Nantucket Island, including town and the Historic District, Siasconset, Madaket, Wauwinet, Polpis, Surfside, Cisco and Tom Nevers. Call Ronan Bradley at 774-236-1374 or email rjbradley10@gmail.com. We answer Monday to Friday, 8am to 4pm.

Nantucket Home Addition Questions

Yes for anything on the exterior. Nantucket is a National Historic Landmark District, and exterior architectural details including new rooflines, windows and sidewall shingling are reviewed by the town's Historic District Commission before work begins. Building permits come from the Town of Nantucket. We coordinate both and keep you posted as the review moves.

Primary suite additions, expanded kitchen and living space, sunrooms, dormers and reworked rooflines, mudrooms and entries, pool houses, guest houses and garage apartments. Framing, trim and finish carpentry are done by our own crew, and Ronan coordinates the other trades from the first day to the last.

That is the whole job. Matching an addition comes down to trim profile, shingle exposure, window casing and roof pitch. Our carpenters handle that detail in house rather than passing it to a subcontractor, which is the reliable way to get new work sitting correctly against an older Nantucket house.

Often yes, depending on which part of the house the work touches. Because many island homes are occupied through the summer, most addition work runs from autumn through spring. Tell us early how the house is used and we will build the sequence around keeping the rest of it livable.

Yes. Detached pool houses, guest houses and garage apartments are a specialty, generally under 2500 square feet. The same crew and the same finish standard apply whether the new structure attaches to the existing house or stands on its own.

Call Ronan Bradley at 774-236-1374 or request a call back. The first conversation covers what you want to add, how the house is used, and how far along your plans are. From there we put a dependable plan and timeline in front of you before anything is committed.

Shingled North Pasture Lane home with wraparound porch, twin dormers, and mahogany front door
Blue sunroom with white window casings, custom storage bench, and open doors to the pool deck
Pool house with slate blue walls, a built-in window bench, and doors opening to the pool deck
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