A custom glass four-season sunroom glowing at sunset

Custom designed · Built to belong

More home.
More life.

A sunroom should feel like it was always part of your home. We design and build spaces made for bright mornings, long dinners, winter storms, and every season between.

30+Years building sunrooms
4Seasons of real comfort
1Team from design through build

Not a kit.
Not an afterthought.

Every Mattison room begins with your home, your property, and how you want to use the space. Rooflines connect. Materials make sense. The finished room feels intentional—from the foundation to the last piece of trim.

Sunny the Sunroom Sun giving a thumbs-up

Hi, I’m Sunny.

I can compare room choices, explain Simonton 5500 windows, show the sources behind technical answers, prepare your project plan, and help you picture a room on your home.

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Architectural drawing of an all-season sunroom addition01

All-season sunrooms

Insulated, conditioned living space with expansive glass and year-round comfort.

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Architectural drawing of a three-season room02

Three-season rooms

Multi-track windows and screens for fresh air with protection through spring, summer, and fall.

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Architectural drawing of a screened porch03

Screen rooms & porches

Fresh air, shade, and a protected place to stretch out the season.

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Architectural drawing of a complete exterior remodel04

Exterior remodeling

Decks, siding, roofing, windows, doors, trim, porches, and exterior upgrades.

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Know the room before we build it.

We don’t take a deposit until you have a detailed contract and a set of drawings approved. You see the plan, understand the materials, and know what is included.

  1. 01

    Walk the space

    We learn how you live, inspect the house, and listen to what the new room needs to do.

  2. 02

    Design the solution

    We shape the size, roof, windows, finishes, and connection to your home.

  3. 03

    Approve every detail

    You receive drawings and a detailed contract before a deposit is due.

  4. 04

    Build it right

    One experienced team carries the project from structure through finish work.

30+

Experience you can see in the details.

Ian Mattison began building custom waterfront homes in Annapolis, Maryland, with his family’s construction business. At 22, he began specializing in sunrooms. More than 30 years of sunroom construction later, that foundation still shapes every project—from respecting an existing roofline and preserving a view to building a room that feels solid in every season.

Serving Maryland and select projects in Northern New York.

5.0★★★★★Verified Google rating

Craftsmanship people remember.

“The quality of the work is outstanding and durable… Converting our screen room was a great decision.”

— Roy Smoot, verified Google review

Plan with clearer answers.

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What would you do
with one more room?

Schedule a free consultation, or use the customer portal if your Mattison project is already underway.