Thoughtfully Designed Room Additions in Littleton, MA 01460

Thoughtful Room Addition Design Build Projects, tailored to suit homes like yours in Littleton MA

Our Wilco design team can craft a wide array of design concepts for the room addition you have wanted by now for quite awhile. We know that a room addition is a major life decision that our design team will assess to create where you have dreamed of living.

Glass enclosed Walk in Shower bathroom design...

Charming coastal cottage design with covered porch, classic shingle siding, manicured landscaping, and ocean views creating a timeless seaside retreat.

A Design Build project for an Aging In Place Room Addition that features ease of access.

Custom aging-in-place home addition design with craftsman-style architecture, featuring seamless integration, accessible first-floor living, energy-efficient windows, and timeless curb appeal designed for long-term comfort and independence

A Design Build project for a Custom Laundry Room Addition
that features natural lighting from the skylights in the roof.
the natural flow makes movement simple and efficient.

Stylish custom laundry room with built-in cabinetry, front-load washer and dryer, open shelving, warm wood floors, and abundant natural light for an organized, upscale space. This Room Addition Design took advantage of unused space and delivered a well organized laundry that is natually lit during daylight and moonlight hours.

Custom Aging in Place Room Addition Design Integrated with the body of the Main Home.

Thoughtfully designed aging-in-place addition seamlessly integrated with the main home, featuring single-level living, covered outdoor spaces, and accessible entry points to support comfort, safety, and long-term independence.

One Night Reveals Party

It's quite remarkable — the design and pricing process usually takes two weeks. But the Wilco Design Team delivers OneDay Design and Good, Better, and Best pricing — all in a single day! These lucky homeowners in Melrose, MA were treated to a One Night Reveal Party to experience their home transformation firsthand.

Jen's One Night Reveal

Karen' One Night Reveal

Liz's One Night Reveal

Let's imagine your Reveal with OneDay.

Every transformation begins with a conversation.
We'd love to hear what you are dreaming about.

Or speak with someone now:

Call (781) 859‑9610
Monday-Friday 9-5pm EST

Why Homeowners Choose Us

Room to grow without moving.
Custom designs tailored to the style of your home.
Energy-efficient windows, insulation, and HVAC.
Seamless interior transitions and exterior finishes.
Fully permitted and code-compliant additions.
Design-first solutions for families in Littleton.

Room addition remodeling Services Offered

Sunrooms and three-season rooms
Main floor guest suites or in-law additions
Home offices and creative workspaces
Primary bedroom expansions
Family room and open-concept add-ons
Garages with bonus room potential

Room addition remodeling

Our Proven Process

Vision Session

Explore needs, zoning, and design goals.

Design + Estimate

We deliver drawings, specs, and transparent pricing.

Pre-Construction

Permits, engineering, materials ordered.

Build Phase

Framing, trades, inspections, and clean jobsite practices.

Finish + Handoff

Final walkthrough, warranty guide, and design docs.

Frequently Asked Questions

Do I need a full architect?

Not always. We provide permit-ready design drawings.

Will this match my home?

Yes. We prioritize seamless integration and curb appeal.

How long do additions take?

Typically 2-4 months depending on complexity and season.

What Littleton Homeowners Say

"Adding a family room changed how we live — it flows like it was always there."

Homeowner, Littleton

"Design, planning, and build were smooth — love the extra space."

Resident, Littleton

Also Serving Nearby Cities

Amherst NH, Andover MA, Atkinson NH, Brentwood NH, Brookline NH, Dunstable MA, Hollis NH, Hudson NH, Lincoln MA, Londonderry NH, Merrimack NH, Nashua NH, North Andover MA, Pelham NH, Salem NH, Sherborn MA, Shirley MA, Stow MA, Stratham NH, Townsend MA, Windham NH.