Additions, second-story build-ups & shed dormers in Somerville, MA. Maximize space on a tight city lot with a 40-year design-build contractor. Free estimates.

Home additions, second-story additions & dormers in Needham, MA. Expand instead of moving with a 40-year design-build contractor. Free estimates.

Home additions, second-story additions & dormers in Medford, MA — from a Medford-based design-build contractor with 40+ years' experience. Free estimates.

Home additions, primary suites, second stories & dormers in Newton, MA. High-quality design-build remodeling from a 40-year MA contractor. Free estimates.

Second-story additions, dormers & home additions in Lexington, MA. Expand your cape, ranch or colonial with a 40-year design-build contractor. Free estimates.

Addition vs. second story — which should you build? Compare cost, space, yard impact, and disruption to decide. A Massachusetts design-build builder breaks it down.

Can you stay in your house during a home addition or second-story project? Usually yes — here's what to expect with dust, noise, utilities, and timing in MA.

Which project adds the most value — an addition, a second story, or a dormer? See how each affects resale and livability, from a 40-year Massachusetts builder.

How much does a home addition cost in MA? Most run $150–$400 per sq. ft., with totals from $50,000 to $250,000+. See 2026 costs for kitchen, bedroom & in-law additions.

How much does a second-story addition cost in MA? Typically $300–$700+ per sq. ft., or $120,000–$350,000+ for a full second floor. 2026 pricing from a 40-year MA builder.

Do you need a permit for a home addition in Massachusetts? Yes. Learn the permit process, how long an addition takes, and what to expect — from a 40-year MA builder.

How much does a dormer cost? Most run $10,000–$40,000, while full-width shed dormers run $50,000–$150,000. Compare shed, gable, hip & more for your home.