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Costello Fine Homes

163 Front Street
Marion, MA 02738
8 West Bay Rd.
Osterville, MA 02738
Company Profile: 


Tim has worked on and managed a diverse portfolio of residential projects throughout his building career, including expansive new construction and historic renovation projects on Nantucket, Cape Cod and the South Coast of Massachusetts. After moving to Nantucket in 1996, Tim had the privilege of working with some of the most talented carpenters, woodworkers and architects in the country on truly exceptional properties. His years on the island allowed him to hone his craft and develop a more thorough understanding of the business and design processes integral to building fine, custom homes. 

Following his tenure on the island, Tim relocated to the mainland and launched his own custom home building company, Costello Fine Homes (CFH). As the company has grown, Tim has purposely developed two of the most valuable tools for successful client partnerships — a discerning ability to understand his client’s vision for their home and the intuitive problem solving skills necessary to deliver it.  Tim’s genuine appreciation for each client’s needs coupled with his willingness to hear what the client is asking the designer/architect to create, facilitates a level of collaboration by the CFH team that is unparalleled in the building industry. 

Tim’s commitment to his business is complemented by his devotion to family, passion for the outdoors and dedication to his community.  Whether spending a day on the water fishing with his children, escaping for a weekend of skiing with his family or coaching his local youth football team, Tim recognizes the delicate work/life balance necessary to leading both a fulfilling life and successful career.

With 24 years of experience and a team that consistently produces only the highest quality craftsmanship, Tim’s expertise and leadership has enabled Costello Fine Homes to cultivate lasting client relationships and deliver a product that exceeds the expectations of even the most sophisticated homeowners.


As Featured In...

Saltonstall Architects; Costello Fine Homes; Mac Davis Flooring; Bartlett Gardens; Surroundings; Designer Garage Doors
Situated on a verdant stretch of lawn overlooking the harbor, this expansive Mattapoisett retreat started out as a potential teardown. Yet the current homeowners, who live year-round in Texas, saw that it was possible to preserve the integrity and footprint of the original two-bedroom structure while reconfiguring the floor plan and adding essential square footage. The husband grew up summering...
Mattapoiset Tea House, front exterior.
What’s the one thing you need for your waterside retreat? A separate tea house where you can escape and relax. With peaceful views, open space and a fireplace, this ladies getaway is the spectacular opposite of a man cave. The Texas clients, a family with grandchildren to entertain, envisioned a haven to enjoy during the summers. They nestled into their Mattapoisett vacation home in the summer of...
outdoor party setting
In celebration of the Cape & Islands Design Guide To mark the launch of the annual Cape & Islands Design Guide, the BDG team hosted a late August afternoon event at the Green Pond Yacht Club in East Falmouth. The day was blissfully beautiful, with high temperatures and a light breeze off of the ocean. Guests came from all over the Cape & Islands, and several traveled from Boston and...
Butler's pantry converted from a bank vault with tin ceilings and white cabinets
A renovation transforms this space from business to pleasure.  Warm metals, tin ceiling tiles, and a mirrored backsplash transformed this bank vault into a jewel box. Previously an old bank, the building was renovated into a house and the homeowners wanted to live with some of its original detailing. They contracted Timothy Costello, owner of Costello Fine Homes and Bill Barr, an interior...
Nickel gap wood paneling lines a custom hallway by McCormack Builders
Coin shortage? What coin shortage? Homeowners everywhere are loving the look of nickel gap wood treatments. While this type of cladding looks similar to shiplap, it’s a little different in that it uses tongue and groove boards that conceal nails for a smoother overall look. The gap between each board is consistent and, you guessed it, about the width of a nickel.  Construction by Costello Fine...