HOME ADDITION CONTRACTOR — FARMINGTON, CT
Home Additions Built for Farmington, CT.
Farmington homeowners choose Lagace Construction for room additions, second-story additions, and in-law suites. High-value neighborhood, strong property appreciation, and an experienced crew that works in Hartford County every day.
25+Years Experience
500+Projects Completed
★ 4.9Google Rated
100%Licensed & Insured
PROUD TO USE INDUSTRY-LEADING BRANDS
WHAT WE BUILD IN FARMINGTON
More space in one of Connecticut's best towns to own.
Farmington Valley properties carry some of Connecticut's highest residential values — and for good reason. Top-tier schools, quick highway access, proximity to Hartford's medical district, and a genuine small-town character. Moving out to get more space means giving up all of that.A home addition lets you stay and get the space you need. Whether it's a rear room addition for a growing family, a second-story build-out to add bedrooms, a master suite addition, or an in-law wing for a parent — Lagace Construction designs, permits, and builds it with our in-house crew.- First-floor room additions — family rooms, great rooms, offices, playrooms
- Second-story additions over single-story Farmington ranches and capes
- Master suite additions — bedroom, walk-in closet, and full bath
- In-law suite additions with private entrance (ADU-capable)
- Kitchen bump-outs and rear open-concept expansions
- Attached garage additions — single or two-car
THE FARMINGTON CASE FOR ADDING ON
High property values make additions an even smarter investment.
In a market where homes sell for $450K–$800K+, every square foot you add increases equity significantly. A well-built addition in Farmington often returns 60–80 cents on the dollar in appraised value — and that's before accounting for the cost and disruption of moving.
Farmington homes deserve additions that match.
Farmington's housing stock ranges from classic New England capes and center-hall colonials to contemporary executive homes — each with strong architectural character. We design additions to integrate with that character: matched rooflines, matched exterior materials, matching window profiles, and interior finishes that flow naturally from the existing home.The Farmington building department reviews for setbacks, lot coverage, energy code, and structural compliance. We've permitted projects here and throughout the Farmington Valley for years. Our permit packages go in complete and get approved without the back-and-forth that costs homeowners weeks.- Architectural matching — roofline, siding, windows, trim
- Permit package prepared in full — no revisions typical
- All trades in-house — framing, plumbing, electrical, HVAC, finish
- CT Licensed NHC contractor: #NHC-0016939
25+Years CT Experience
500+Projects Built
100%In-House Crew
★ 4.9Google Rated
INVESTMENT GUIDE
What does a home addition cost in Farmington?
Farmington addition costs reflect Hartford County norms. Type, size, and finish level are the main drivers. Here's a realistic range.Room Addition
$95K – $195K
A first-floor addition — family room, bedroom, home office, or great room — added to your Farmington home's rear or side.- New foundation, framing & exterior
- Matched roofing, siding & windows
- Full mechanical, electrical & insulation
- Finish to match existing home interior
Second-Story Addition
$195K – $395K
Add a full or partial second floor above your Farmington ranch or cape — the most efficient way to significantly expand living area.- Structural assessment & engineering
- Full or partial second-floor build-out
- 2–4 bedrooms + bath typical
- Full design-build service included
In-Law Suite Addition
$165K – $320K
An attached in-law wing with private entrance, full kitchen, bedroom, and bath — permitted and designed for multigenerational living or future ADU rental.- Private entrance & dedicated utilities
- Full kitchen & bath finish work
- Can be permitted as a legal ADU
- Permits & CO inspection included
YOUR QUESTIONS ANSWERED
Frequently Asked Questions — Home Additions in Farmington
Do I need a permit to add onto my Farmington home?
Yes — all structural additions in Farmington require a building permit. This covers room additions, second-story additions, garage additions, and in-law suites. We prepare all permit drawings, submit the application to Farmington's building department, and manage the inspection process on your behalf. You don't need to deal with the town directly.How long does a home addition take in Farmington?
A first-floor room addition typically runs 3–5 months from permit approval to final walkthrough. Second-story additions run 5–9 months. Farmington building permits for standard additions are typically approved in 4–8 weeks. We submit within 2–3 weeks of finalizing the design and begin material procurement immediately so there's no gap when permits clear.What's the return on investment for a home addition in Farmington?
In Farmington's market, a well-built addition typically returns 60–80% of construction cost in immediate appraised value — and the full value in livability. A second-story addition that adds two bedrooms and a bath in a market where bedroom count drives price can easily generate $150K–$250K in additional appraised value. Consult with a local appraiser for a property-specific estimate.Can my Farmington in-law suite addition qualify as an ADU later?
Yes — if designed with that flexibility in mind from day one. A separate private entrance, proper fire separation, full kitchen rough-in, and code-compliant bathroom are the key design elements. We can build your addition to serve as purely family space now, but with the infrastructure already in place to permit it as a legal ADU if your needs change.What makes Lagace Construction different from other addition contractors?
We're a full-service, in-house operation — not a GC who subs out every trade. Scott Lagace has been building in Hartford County for over 25 years. Our crews do the framing, plumbing, electrical, HVAC rough-in, tile, and finish work. That means better quality control, faster timelines, and one person accountable for the whole job. We've built over 500 projects in this area. We know how to get it done. START YOUR PROJECT
Book a free, no-pressure quote.
Pick a time that works for you. Scott or one of our project leads will visit your home, walk the addition with you, and follow up with a clear written estimate — usually within 5 business days.- On-site consultation, no obligation
- Line-itemized written estimate
- Real timelines and a real start date
- CT Licensed & Insured (Reg. #NHC-0016939)
Prefer to call? Reach Scott directly at (860) 933-2700
Serving Hartford & Tolland Counties
Based in Andover, CT — building home additions and ADUs across central and eastern Connecticut for over 25 years.
FarmingtonWest HartfordGlastonburyHebronCoventryBoltonManchesterTollandAndoverColumbiaSouthingtonBristolAvonCantonSimsbury
