Cape Cod & Martha's Vineyard
Home Addition Contractors You Can Count On
Green Island Homes plans and builds room additions, second stories and bump-outs that match your home. Licensed, insured and easy to work with.
- Additions that blend right in with your existing home
- One crew for framing, roofing, siding and drywall
- Fair pricing and clear updates from start to finish
Fully licensed and insured. HomeAdvisor Screened & Approved, Top Rated and Elite Service.
Prefer to talk? Call (774) 563-9714
Tell us about your addition
Share a few details and we'll get back to you about your project on Cape Cod or Martha's Vineyard.
Why homeowners here choose Green Island Homes
All phases under one roof
Framing, roofing, siding, drywall and finish work are handled by our team, so you are not chasing separate trades.
Licensed and insured
Green Island Homes is fully licensed and insured for residential work on Cape Cod and Martha's Vineyard.
Communication you can follow
Customers tell us the best part is great communication through the entire project. You always know what comes next.
Fair pricing
We quote your addition honestly and explain what drives the cost, so there are no surprises later.
Built for island and Cape conditions
We build homes and additions here every day, from roofing to siding to site work like septic.
What a home addition with us includes
An addition should look like it was always part of your house. We plan the layout, match the roofline and siding, and tie the new space into your existing rooms so it feels natural to live in.
Because we handle all phases of construction, one team carries your project from the foundation and framing through roofing, siding, drywall and the final details. If your addition needs site work such as a septic upgrade or new landscaping, we can take care of that too.
- Room additions and living space expansions
- Second story and bump-out additions
- Barn house and accessory structure construction
- Roofing installation to match or replace your existing roof
- Siding installation and repair for a seamless exterior
- Drywall installation and finishing inside the new space
- Custom closets and interior build-outs
- Decks, pergolas and outdoor living space tied to the addition
- Septic system installation, repair and maintenance
- Landscaping to restore and improve curb appeal after the build
Trusted on Cape Cod and Martha's Vineyard
“Thanks again for being so easy to work with. You are the "dream construction person" I didn't think existed. Happy spring.”
“Experience was great, would hire them again for any other project that I may have in the future. Price was fair, and great communication with us through the entire project.”
“Reliable, knowledgeable and friendly service. Did a great job and would not hesitate to hire them again for future projects.”
How it works
Send your details
Fill out the short form with your address and what you have in mind for the addition.
Talk it through
We contact you to go over the space, your goals and any site details like access, roofing or septic.
Get your quote
You receive a clear written quote for the work, then we schedule the build and keep you updated throughout.
Frequently asked questions
How much does a home addition cost?
Cost depends on the size of the addition, the foundation and site work, and the finishes you choose. Customers tell us our pricing is fair. Send your details and we'll give you a quote based on your actual project.
Where do you build additions?
We serve Cape Cod and Martha's Vineyard, Massachusetts. Our office is at 223 Upper Main St, Edgartown, MA.
Do you handle the whole job or just framing?
We handle all phases of construction. That includes framing, roofing, siding, drywall, interior finish work and site services such as septic and landscaping.
Are you licensed and insured?
Yes. Green Island Homes, LLC is fully licensed and insured. We are also HomeAdvisor Screened & Approved, Top Rated and Elite Service recognized.
Can you match the addition to my existing house?
Yes. We choose roofing and siding materials and details that blend the new space with your current home, inside and out.
Can you also remodel the rooms next to the addition?
Yes. We do whole-home and room remodeling, so we can update the connecting rooms while the addition is being built.
Ready to add more space to your home?
Tell us about your addition and we'll get back to you with a clear quote. Serving homeowners across Cape Cod and Martha's Vineyard.
- Additions that blend right in with your existing home
- One crew for framing, roofing, siding and drywall
- Fair pricing and clear updates from start to finish
Prefer to talk? Call (774) 563-9714