Expert Home Addition Contractor with Legacy Construction
A great addition looks like it was always there. We design and build seamless additions, fully integrated with your existing home, from architecture through finished interiors.
A home addition is not just more square footage. It is a structural integration that has to match your home architecturally and perform for decades.That distinction is where most additions succeed or fail. Legacy Construction has built additions that are indistinguishable from the original structure — roofline, siding, trim, and all.
What we bring to every project:
- We show up when we say we will
- We build exactly what we said we'd build
- We never leave a project unfinished
TESTIMONIALS
Hear from some Southern Maine
homeowners we've helped
Watching our home transform through this addition was incredible. Legacy Construction communicated clearly, respected our space and vision, and delivered work that feels solid and intentional. You can tell they care about doing things the right way—and building work that lasts.
Jennifer C.
Legacy Construction built an addition onto our home, and the quality is outstanding. The new space blends perfectly with the original house. They worked with us on budget and design and were always upfront about costs and options. Very professional from start to finish.
Savannah B.
From the first meeting, Legacy Construction was honest, professional, and easy to work with. They walked us through budget, design, and expectations clearly and followed through on everything. The end result is a beautifully built space that feels solid and well thought out.
Mehak K.
Service area where we provide Home Addition Contracting
Don't see your town listed above? Call us anyway and we'll still come to you!
Built to match. Built to last.Structural integration done right.
Every addition we build is designed to match your home architecturally and perform structurally. We manage the full project so you stay focused on your life, not your job site.
Site Visit, Design, and Full-Scope Construction
It starts with a site visit where we evaluate your lot, discuss intended use, and identify setback constraints, drainage, and utilities. We design around your specific needs, whether that is a two-car with a workshop, oversized bays, or a steep pitch for attic storage above.
Foundation, Framing, and What Maine Demands
Every custom garage includes site prep, excavation to a full four-foot frost depth, foundation, framing, roofing, siding, electrical, overhead doors, and concrete flatwork. Maine's frost line is one of the deepest in the country, so the foundation alone requires more engineering than most expect.
Cost Range, Timeline, and What Drives Both
Our custom garages range from 47,548 for a 24x24 two-car build to 115,200 for a 32x36 three-car with attic storage. Timelines run eight to fourteen weeks, with larger builds reaching eighteen. We recommend starting design in late winter so construction wraps before fall.
We coordinate all permits, schedule every inspection, and manage the full project so nothing falls through the cracks on your property. Contact us to start planning yours.
Count on Legacy Construction for your Home Addition Contracting needs
Customer Satisfaction
We offer a 2-year warranty on all of our work, so you can have peace of mind knowing it'll be done right the first time.
Built on Repeat Business
70% of our clients come back for another project. That kind of return rate tells you more about our work than any sales pitch could.
Full-Scope Construction
No matter the scope or scale of your project, we handle every phase of the build from start to finish with our own crew on site.
Insured and Accountable
We carry full insurance on every project we take on, and we put our 2-year warranty in writing so you know exactly what backs the work.
Our easy 3-step process for perfect Home Addition Contracting
1
ARRANGE YOUR ADDITION CONSULTATION APPOINTMENT.
Contact us to discuss your space requirements, budget considerations, and existing home conditions so we can design an addition that works with your property.
2
WE'LL CONSTRUCT YOUR SEAMLESS ADDITION.
Our team executes construction with structural precision, architectural matching, and careful management of your occupied home throughout the project.
3
ENJOY YOUR EXPANDED HOME IMMEDIATELY.
We deliver your finished addition with architectural harmony, completed on schedule and built to look like it was always part of your home.
Frequently asked questions regarding Home Addition Contracting
How much does a home addition cost in Southern Maine?
A single-room addition typically runs $80,000 to $150,000 depending on size and scope. Larger additions can reach $200,000 or more. Legacy Construction provides a fixed-price contract before breaking ground.How long does a home addition take?
Most home additions run twelve to twenty weeks from groundbreaking to final walkthrough. Larger additions with second stories or complex roofline integrations can take longer. Legacy Construction builds the inspection sequence into the schedule from day one.Do you need a permit for a home addition?
Yes. Home additions require a building permit and depending on scope may require separate electrical, plumbing, and mechanical permits. Legacy Construction manages every permit and inspection for every addition we build.Where do you build additions in Southern Maine?
Legacy Construction builds home additions across Southern Maine within roughly 30 miles of Portland. Call (207) 544-4607 to confirm whether we cover your area.What warranty covers home additions?
Every home addition is backed by our full warranty: 1 year on materials, 2 years on systems, 5 years on workmanship, and 10 years on structural coverage. Five times longer than Maine's standard. Everything is in writing before work begins.How do I start an addition project?
Call us at (207) 544-4607 or fill out the estimate form. We will evaluate your existing home, discuss your addition plans, and put together a written estimate. From there we move into design and planning.
