ADU BUILDER — FARMINGTON, CT
ADUs & In-Law Suites Built for Farmington, CT.
Farmington homeowners are discovering that accessory dwelling units are one of the smartest investments on a Hartford County property. We design, permit, and build them — attached additions, detached cottages, or basement conversions.
25+Years Experience
500+Projects Completed
★ 4.9Google Rated
100%Licensed & Insured
PROUD TO USE INDUSTRY-LEADING BRANDS
WHAT WE BUILD IN FARMINGTON
A fully permitted second unit on your Farmington property.
Farmington's combination of large lots, high property values, and proximity to UConn Health, Hartford Hospital, and Saint Francis Medical Center makes it one of Connecticut's strongest ADU markets. Medical residents, traveling nurses, and hospital staff are actively seeking rental housing in the Farmington Valley — and a well-built ADU can meet that demand while adding significant equity to your home.Connecticut's 2026 ADU law opened permitting for most Farmington properties. Lagace Construction handles every step: site assessment, zoning research, design, engineering, permits, and full construction with our in-house crew.- Attached in-law suites & ADU additions with private entrance
- Detached backyard ADU cottages & carriage houses
- Basement ADU conversions with egress & separate entrance
- Farmington zoning research & variance applications if needed
- Utility tie-ins & septic assessment coordination
- Full permits, engineering, CO inspection — in-house
WHY FARMINGTON
High property values. Strong rental demand. Smart investment.
An ADU in Farmington isn't just about family flexibility — it's a real estate play. Here's why the numbers work.
Farmington Valley rental market is real.
UConn Health is Farmington's largest employer with thousands of staff, residents, and fellows who need housing close to campus. Pair that with Cigna's Farmington headquarters, Farmington Valley's top-ranked schools, and easy I-84 access, and you have one of Connecticut's most consistent rental demand markets.A finished, code-compliant ADU on your Farmington property can generate $1,500–$2,400/month in rental income — while also giving you the flexibility to house family when you need to. It's the most versatile investment you can make in your current home.- UConn Health rental demand: strong & consistent
- Farmington Valley ADU values track with strong market
- Flexible: rent now, family suite later
- Licensed NHC contractor: #NHC-0016939
25+Years CT Experience
500+Projects Built
100%In-House Crew
★ 4.9Google Rated
INVESTMENT GUIDE
What does an ADU cost in Farmington?
Farmington pricing reflects Hartford County norms. Finish level, site conditions, and ADU type are the main drivers. Here's a realistic range.Basement Conversion
$85K – $160K
Convert your existing Farmington basement into a fully self-contained, permitted living unit with its own separate entrance.- Egress windows & exterior door
- Full kitchen & bathroom rough-in & finish
- Separate electrical sub-panel
- Permits & CO inspection included
Attached ADU Addition
$165K – $320K
An in-law wing or ground-floor addition to your Farmington home — fully self-contained with its own private entrance, kitchen, and bath.- Private entrance & dedicated utilities
- Full kitchen, bedroom(s), full bath
- Structurally tied into existing home
- Full design-build service included
Detached ADU / Cottage
$220K – $480K
A fully independent structure — cottage, carriage house, or garage-with-living-above — on your Farmington lot. Highest rental income potential.- New foundation, framing, & structure
- All utilities & mechanicals new
- Maximum privacy — fully independent
- Best for long-term rental income
YOUR QUESTIONS ANSWERED
Frequently Asked Questions — ADUs in Farmington
Are ADUs permitted in Farmington, CT?
Yes. Connecticut's 2026 ADU law requires Farmington to allow accessory dwelling units on single-family residential lots. Farmington's zoning historically had restrictions, but state law now overrides local prohibitions for most properties. We review your specific parcel, lot coverage, and setbacks during your free on-site consultation to confirm what's buildable.Can I rent my ADU to UConn Health staff or students?
Yes — long-term residential rentals are fully permitted. With UConn Health's campus less than a mile from most Farmington neighborhoods, demand from medical residents, fellows, and hospital staff is genuine and consistent. A well-finished ADU in Farmington can typically be rented quickly and at strong rates.How does Farmington's permitting process work for ADUs?
ADU permit applications in Farmington go through the building department and are reviewed for zoning compliance, setbacks, lot coverage, and building code. We prepare all permit drawings and applications. Most straightforward ADU permits in Farmington are approved in 4–10 weeks. Detached new-builds may require additional zoning review.What if my Farmington property is on septic?
We assess septic feasibility during the free consultation. For detached ADUs or basement conversions on older septic systems, a licensed engineer's assessment may be required. We coordinate that process and can give you a clear picture of costs before you commit to anything.What's included in your free Farmington ADU consultation?
We visit your property and walk through the project with you. We assess the existing structure, identify the most feasible ADU type for your lot, review basic zoning parameters, give you a ballpark cost range, and follow up with a full written estimate within 5 business days. There's no charge and no obligation. 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 project 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 ADUs and additions across central and eastern Connecticut for over 25 years.
FarmingtonWest HartfordGlastonburyHebronCoventryBoltonManchesterTollandAndoverColumbiaSouthingtonBristolAvonCantonSimsbury
