Expert Home Additions & Remodeling in Eastern CT
Transforming homes in Andover, Coventry & Tolland since 2001. We manage every detail from permits to final inspection.
Building Your Future, Made Simple
We know construction can be overwhelming. From acquiring local permits to passing final inspections, Lagace Construction manages the heavy lifting so you can focus on the excitement of your new space.
Whether you have blueprints ready or just a rough idea, we offer transparent pricing, clear timelines, and a family-owned touch that treats your home like our own.
2026 Project Estimator
Disclaimer: This calculator provides a rough estimation based on 2026 market averages in Tolland/Hartford County. Actual costs vary based on site conditions, structural needs, and material choices.
Comprehensive Contracting Services
Enhance your space effortlessly. Whether building new, expanding your footprint, or refreshing an outdated room, our experienced team delivers elite craftsmanship tailored to your vision.
New Home Construction
From foundation to finish, we build custom homes tailored specifically to your land and lifestyle.
Learn More →Home Additions
Expand your living space with seamless in-law suites, sunrooms, and large-scale home extensions.
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Kitchen Remodeling
Modern functional layouts, custom center islands, and flawless high-end cabinetry installation.
Learn More →Bathroom Remodeling
Spa-like upgrades, custom tile showers, and efficient fixtures for your master or guest bath.
Learn More →Garage Builders
Attached or detached custom garages designed for vehicle storage, workshops, or extra loft space.
Learn More →Siding & Roofing
Protect your home's envelope with CertainTeed siding and professional, weather-tight roofing services.
Learn More →Trusted Products We Use

Frequently Asked Questions
Planning & Permits
Do I need a building permit?
Yes. Any structural addition, deck, or major remodel requires a permit. We handle the entire application process with your local building department to ensure code compliance.
How long does a home addition take?
Timelines vary by scope. A standard garage build might take 4 to 6 weeks, while a large-scale home addition or second-story build-up can take 3 to 5 months depending on weather, material lead times, and complexity.
Do you provide architectural drawings?
We work closely with trusted local architects and can help facilitate the design process. If you already have stamped plans from your own architect, we can build directly from them.
Service & Materials
What areas do you serve?
We are based in Andover, CT and actively serve Coventry, Tolland, Columbia, Hebron, Marlborough, Mansfield, Manchester, Vernon, Glastonbury, and surrounding towns within Eastern and Central CT.
Are you licensed and insured?
Absolutely. We hold a valid New Home Contractor License (#NHC.0016939) and carry full liability and workers' compensation insurance, protecting you and your property.
Can we live in the house during a remodel?
Usually, yes. We take great care to seal off construction zones with proper barriers to minimize dust and disruption to your daily life, though extensive kitchen remodels may require you to set up a temporary cooking station.