Andover home additions that look like they belong

Across Ballardvale, Shawsheen Village, West Andover, South Andover, Downtown Andover and West Parish, Andover ranges from 19th-century mill-village homes in Ballardvale and planned Shawsheen Village houses to newer homes in West Andover and colonials near downtown. A Andover addition has to match the roofline, siding and structure of the existing home, so it reads as part of the house, not a box bolted on.

This page is built for Andover homeowners comparing home addition contractors near them. It connects the Andover search to project photos, neighborhoods, the full addition scope and a direct estimate path.

• Clear estimate conversations before the project starts.
• Direct communication with the homeowner from walkthrough to final walkthrough.
• Local coverage across Andover and the wider Essex County area.

Most Andover home additions land between $60,000 and $150,000 for a room addition, and more for a large or second-story build, roughly $150 to $350 per square foot depending on the work.

• How many square feet the addition adds.
• Foundation work and whether you build out or up.
• Matching the roof, siding and trim to the current house.
• The finish level inside the new space.

In Andover, 19th-century mill-village homes in Ballardvale and planned early-1900s houses in Shawsheen Village often add layout and access constraints, so the estimate accounts for access, structure and prep before a single fixture is ordered.

DeFaria gives a fixed, itemized Andover estimate at the walkthrough, so the price matches the actual scope instead of a guess.

Because a Andover addition ties into the existing home, the exterior and insulation are matched and built for New England weather.

• A foundation built for the addition and the existing structure.
• Weatherproofing and insulation for four-season comfort.
• Exterior materials matched to siding, roof and trim.
• Trim, doors and finishes that carry through from the old space.

Around Ballardvale and Shawsheen Village, 19th-century mill-village homes in Ballardvale and planned early-1900s houses in Shawsheen Village often add layout and access constraints, so materials and waterproofing are matched to the home instead of picked from a generic list.

DeFaria Construction supports home addition searches across Andover and nearby Essex County towns, giving visitors enough local context to decide whether DeFaria is the right fit before they call.

Across Ballardvale, Shawsheen Village and West Parish, Andover projects are matched to the neighborhood and run through the Town of Andover Building Division.

• Ballardvale
• Shawsheen Village
• West Andover
• South Andover
• Downtown Andover
• West Parish

DeFaria Construction is a local, owner-led remodeling company working across Essex County and Middlesex County. With Luiz DeFaria involved directly and an A+ BBB record behind the work, the Andover home addition page is written around real structure, exterior tie-ins and finish coordination, not a city name dropped into a template.

DeFaria Construction is a licensed and insured local contractor with an A+ BBB rating and verified customer reviews, and every Andover project is owner-led by Luiz DeFaria from the first walkthrough to the final one.

"they tied the new Andover space into the old house cleanly, structure and finish both."

Andover homeowner

Reviewed by Luiz DeFaria, owner of DeFaria Construction · Updated September 2026

The goal is to help someone searching for Andover home addition contractors understand the scope, the neighborhoods covered and how to start a direct conversation before requesting a free estimate.