Home Additions in Somerville MA | North Heritage Construction

Your Somerville Home Has Good Bones — Let's Build on Them

Somerville is one of the most densely built communities in Massachusetts. Lots are tight. Setback requirements limit what you can do with the footprint. But the homes here — many of them multi-family Victorians and classic New England two-families — have solid structure and real character worth preserving.

When you need more space in Somerville, the answer is usually building up or rebuilding what's already there. That's exactly what we do. We've removed aging enclosed porches and replaced them with full two-story additions — expanding living rooms, creating new offices, and adding usable square footage without touching the lot line. The key is matching the existing architecture so the addition looks original to the home — not bolted on.

North Heritage Construction is a licensed and insured general contractor based in Massachusetts, serving Somerville and surrounding communities since 2004. Every project is managed by our own experienced team — coordinating every trade from start to finish.

2004

Est. in Massachusetts

5★

Google Rating

5-Star Reviews

Licensed and Insured

What We Build in Somerville

Additions and renovations designed for Somerville's dense lots and historic housing stock.

Second-Story Additions

When you can't expand out, you go up. We build second-story additions over existing first-floor structures — adding bedrooms, offices, or full living space without changing your footprint. New framing, roofing, and exterior finishes are matched to the original home.

Porch-to-Addition Conversions

Many Somerville homes have enclosed porches that waste valuable square footage. We remove these aging structures and rebuild them as fully insulated, code-compliant additions — expanding living rooms, creating home offices, or adding new entry areas.

Full Home Renovations

Complete interior and exterior renovations that modernize your Somerville home while preserving its character. Andersen 400 series windows, Boral siding, PVC trim, layout reconfiguration, updated systems — managed from start to finish by one team.

Dormers

Shed dormers and gable dormers that convert underutilized attic space into functional rooms. A cost-effective way to add bedrooms, bathrooms, or a home office in Somerville's tight-lot housing.

Featured Project

Two-Story Addition — Somerville, Massachusetts

Removed an existing enclosed first-floor porch, rebuilt the structure, and added a full second story — expanding the living room and creating a new home office. Finished with Andersen 400 series windows, Andersen patio front door, PVC trim, and Boral siding. Complete project management by our experienced team.

Somerville MA home before addition project

Before — Enclosed Porch

Completed home addition in Somerville MA by North Heritage Construction

After — Two-Story Addition

Completed two-story addition exterior front view Somerville MA

Exterior — Finished

Andersen patio front door on completed Somerville MA home addition

Front Entry

Addition Interior

Addition Living Space

Custom interior French doors with crown molding trim Somerville home addition

French Doors & Trim

Bathroom

Vanity & Tub

Quartz countertop bathroom vanity with undermount sink Somerville renovation

Quartz Vanity

Carrara marble subway tile shower with glass mosaic accent border

Marble Tile Detail

Custom bathroom vanity with quartz countertop and shaker cabinet doors

Custom Cabinetry

View Full Portfolio

Experienced Team — Every Phase Managed

Somerville's permitting process is particular, and working on dense, close-setback lots adds complexity that most contractors underestimate. We've worked in Somerville before. We know how to navigate the inspections, how to manage site logistics on tight lots, and how to deliver a finished product that meets code and looks right.

Everything is coordinated by our experienced team. One point of contact, clear accountability from demo day through final walkthrough.

Architectural design and permit drawings

All Somerville permits pulled and inspections managed

Demolition and structural removal

New foundation work and structural framing

Roofing tied into existing structure

Andersen 400 series windows and patio doors

Boral siding and PVC trim — matched to existing home

Clean site and final walkthrough

Why Somerville Homeowners Choose North Heritage

Experience on Dense Lots

Somerville lots are tight. We know how to manage material staging, equipment access, and neighbor coordination on properties with minimal setbacks and shared driveways.

Local Permitting Knowledge

We handle all permits and inspections with the City of Somerville. We know the requirements, the process, and the timeline — so your project doesn't stall waiting on paperwork.

Experienced Team — Every Phase Managed

Our own crew handles all carpentry, framing, and finish work. For licensed trades, we coordinate trusted specialists we've worked with for years. Consistent quality and clear communication throughout.

Premium Materials, Seamless Finish

We use Andersen 400 series windows, Boral siding, and PVC trim — materials that perform in New England weather and age well. Every detail is matched to the existing home so the addition looks original.

Free Estimate

Tell Us About Your Project

We respond within 1 business day. No obligation, no pressure — just an honest conversation about your project.

Prefer to call? 508-353-2368 — Mon–Fri 7AM–5PM, Sat 8AM–12PM

Frequently Asked Questions

How much does a home addition cost in Somerville, MA?

Home additions in Somerville typically range from $200 to $400 per square foot depending on complexity and finish level. A two-story addition with full interior finish typically starts at $200,000. Somerville's dense lots often make building up the most practical option. We provide a detailed, itemized estimate after walking your property.

Do I need a permit for a home addition in Somerville?

Yes — all structural additions require a building permit in Somerville. North Heritage handles all permit applications and inspections as part of every project. Somerville's building department typically takes 4–8 weeks to approve permits; we factor this into the project schedule from day one.

How long does a home addition take in Somerville?

Most home additions take 3–6 months from permit approval to final walkthrough. A two-story addition with full interior finish typically takes 4–6 months. We give you a realistic schedule upfront and stick to it.

Can you work on tight lots in Somerville?

Yes — tight lots are the norm in Somerville and we build in them regularly. When the footprint can't expand outward, we build up. We assess setback requirements, zoning restrictions, and structural feasibility before recommending an approach — so you understand exactly what's possible before any work begins.

Will the addition match my existing Somerville home?

Yes — matching the existing structure is a core part of how we work. We match rooflines, siding, window styles, and trim details so the addition looks like it was always part of the original home. Somerville's Victorian and multi-family housing stock has distinct architectural character that we take seriously.

Do you use subcontractors?

Our own crew handles all carpentry, framing, roofing, siding, and interior finish work. For licensed trades — plumbing, electrical, HVAC, insulation, and plaster — we work with trusted specialists we've coordinated with for years. Our team manages the site every day.

Home Additions and
Second-Story Additions in Somerville

Your Somerville Home Has Good Bones — Let's Build on Them