Second-Story Additions, Dormers & Home Additions in Lexington, MA
- Jun 22
- 2 min read
Quick answer: Kneeland Construction builds second-story additions, dormers, and home additions throughout Lexington, MA. Many Lexington homes are capes and ranches that are excellent candidates to build up — adding a full second floor or a dormer to gain bedrooms and baths as families grow. We manage design, permitting, and construction from start to finish.
Why Lexington homeowners add on
Mid-century capes and ranches that are ideal to build up.
Top-rated schools that lead families to expand rather than relocate.
Homes that need more bedrooms and bathrooms for growing families.
Owners who want to modernize without leaving the neighborhood.
Popular projects in Lexington
Second-story additions — convert a cape or ranch into a full two-story.
Dormers — add headroom and a bedroom or bath upstairs.
Primary-suite & family-room additions — space for growing families.
Whole-home expansions — modernize and enlarge in one project.
Permits in Lexington
Additions and second stories in Lexington require a building permit from the Town of Lexington, and homes near the historic center may need additional review. We manage the permitting and inspections for you.
Frequently asked questions
Can I add a second story to my Lexington cape or ranch?
Most capes and ranches are excellent candidates to build up. We assess your foundation and framing at a free in-home consultation before any work begins.
How much does a second-story addition cost?
In Massachusetts, second-story additions typically run $300–$700+ per square foot, or about $120,000–$350,000+ for a full floor. See our cost guide below.
Related cost guides
Get a free Lexington estimate
Kneeland Construction has built additions, second levels, and dormers across Greater Boston for 40+ years. Call 781-393-9899 or request a free estimate for your Lexington project.
