Home Additions, Dormers & Second-Story Build-Ups in Somerville, MA
- Jun 22
- 2 min read
Quick answer: Kneeland Construction builds additions, second-story build-ups, and dormers across Somerville, MA. On Somerville's dense lots — where Victorians, two-families, and triple-deckers leave little room to build outward — expanding upward with a dormer or an added floor is usually the smartest way to add living space. We manage design, permitting, and construction so you can expand without leaving the home you love.
Why Somerville homeowners add on
Very tight lots that leave little room to expand outward — up is the way to grow.
Victorians, two-families, and triple-deckers well suited to dormers and added floors.
Attics that can become full bedrooms or baths with a shed dormer.
Strong property values that reward added, finished square footage.
Popular projects in Somerville
Shed dormers — unlock full headroom across the top floor.
Second-story / build-up additions — add a floor to a two-family or single.
Attic build-outs — finish an attic into living space.
Kitchen expansions — enlarge tight city kitchens.
Permits in Somerville
Projects in Somerville require a building permit from the City of Somerville and inspections at each stage; homes in local historic districts may need additional review. We manage the full permitting and inspection process for you.
Frequently asked questions
Can I add space on a small Somerville lot?
Almost always — when building out isn't possible, we build up with a dormer or an added floor, or finish an attic. We'll assess what your lot and zoning allow at a free consultation.
How much does a dormer or second story cost?
Dormers typically run $10,000–$40,000 (more for a full-width shed dormer), and second-story additions $300–$700+ per square foot. See our cost guides below.
Related cost guides
Get a free Somerville 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 Somerville project.