Home Additions Built to Code in New Hampshire
When you need more room, an addition can be the simplest answer. Atlas builds additions to code and ties them into the existing house cleanly, inside and out.
- NH licensed home inspector
- EPA certified lead renovator
- 55+ years combined experience
- 115K+ hours combined experience
- Read our Google reviews
Additions we build
- Bedroom and family room additions
- Mudrooms and entries
- Porches and covered entries
- Bump-outs for kitchens and baths
One team from foundation to finish
Atlas handles all types of construction projects from foundation to finish work, that way you don't need to trust dozens of subcontractors to achieve your goals.
Common questions
Should I build an addition or an ADU?
An addition adds space to your home. An accessory dwelling unit (ADU) is a separate living unit with its own kitchen and bath, which New Hampshire law allows on most single-family lots. Our ADU page covers the rules.
Do I need a permit for an addition?
Yes. Additions need a building permit, and many towns also check setbacks and lot coverage. We help with the drawings and the permit application.
How do you tie an addition into the old house?
The roof, walls and foundation of the addition have to join the existing house without leaks or cold spots. We plan the flashing, air sealing and insulation at that joint before construction starts.
What clients say
Did several renovations for us that went very smoothly. Would rehire and recommend!
More in repairs & remodeling
Siding replacement
Old siding off, repairs made, new siding on.
Flooring
Hardwood refinishing, vinyl plank (LVP), laminate, subfloor repairs.
Bathroom remodeling
Vanities, toilets, tub and shower updates, floors and fans.
Doors, plumbing and repairs
Leaky toilets, doors, drywall, trim and rot.
Mold cleanup and repair
Cleanup, repairs and the moisture fix. Testing is done by an independent assessor.
New home construction
Homes built to current code, from your plans or ours.
Drywall repair
Water-damaged ceilings and walls cut out, replaced and repainted.- Window replacementVinyl replacement windows set in your existing frames, sealed and capped.
- DecksPressure-treated decks on frost footings, with railings and steps.
- Interior paintingWalls prepped properly, then two coats, in homes and rental units.
- Kitchen remodelingNew cabinets, counters, backsplash and lighting in your existing layout.
- RoofingAsphalt shingle replacement, metal roofing, repairs and flashing.