Double your space. Same lot.
Full second-story additions and partial dormer expansions across Hartford and Tolland Counties. Engineered for your existing foundation, designed to match your existing roofline.
A second story is often cheaper than moving.
You love your neighborhood, your school district, and your commute. You don't want to leave. You just need more square footage. A full or partial second-floor addition gives you the rooms you need — and adds significant value to your home.
Lagace handles the engineering, permits, and construction skilled local. We assess your existing foundation, plan the structural reinforcement, design the new floor plan, and build it without your family relocating.
- Full second-floor additions (1,000+ sq ft)
- Partial dormer expansions (300-700 sq ft)
- Foundation reinforcement when required
- Existing roof tear-off and tie-in
- Electrical panel upgrade and HVAC zoning
- Town zoning, permits, engineering — all handled
Recent Connecticut projects.
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
Common questions.
Will my existing foundation support a second story?
Most concrete-block or poured foundations in Connecticut support a partial or full second story with minimal reinforcement. We engage a structural engineer to assess your specific foundation as part of the design process. If reinforcement is required, the cost is included in your written estimate.
How long does a second-floor addition take?
A partial dormer addition runs 12-16 weeks. A full second-story add runs 5-8 months from foundation reinforcement through certificate of occupancy. We provide a detailed weekly schedule.
Can we live in the house during construction?
Usually yes — depending on your existing layout. We tarp and seal off the work zone and minimize disruption. Some families relocate during the framing phase (2-4 weeks); most stay in place for the rest.
How much does a second-floor addition cost?
Partial dormers typically run $90,000 to $200,000. Full second-floor additions run $200,000 to $400,000+ depending on size, finish level, and structural scope. Every project gets a written line-item estimate.
Hartford & Tolland Counties
Based in Andover, CT — building, remodeling, and adding on to homes across central and eastern Connecticut for over two decades.
Ready to add the second floor you actually need?
Engineered, permitted, and built by the same Lagace crew from start to finish.
CALL DIRECT(860) 933-2700
Frequently Asked Questions
How much does a second-floor addition cost in Connecticut?
Second-floor additions in Connecticut typically cost $200–$300 per square foot, higher than single-story additions because of structural reinforcement, roof rework, and staircase construction. We provide a free, detailed written estimate.
How long does a second-floor addition take?
Most second-floor additions take 4–7 months from permit approval to final walkthrough, depending on scope and whether the existing structure needs reinforcement.
Will my house need structural reinforcement for a second-floor addition?
In most cases, yes — the existing first-floor walls and foundation need to be evaluated and often reinforced to support the additional load. We handle structural engineering review as part of the design process.
Do I need a permit for a second-floor addition in CT?
Yes, second-floor additions always require a building permit and typically an engineered structural plan. We manage the full permitting process and all required inspections.
Can I stay in my home during a second-floor addition?
Most homeowners can stay in the home during a second-floor addition, though there will be periods of noise and limited access to parts of the house, especially during roof and structural work.