Bright open-concept living and dining space with large windows

Home Additions in Decatur, Indiana

More Room. Built To Match.

Need an extra bedroom, a sunroom, or a bigger garage? We design and build home additions that blend seamlessly with your home, matched from the foundation to the roofline. Serving homeowners across Adams County.

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Why Add On

More Room, Same Address

Moving to a bigger house means a new mortgage, a new neighborhood, and leaving behind the schools and streets your family already knows. A well-planned addition gives you the extra bedroom, bathroom, or living space you need while keeping the equity and the home you already love. We build additions for homeowners in Decatur, Berne, Monroe, Geneva, Bluffton, and the rest of Adams County.

One Real Project

From First Cut to Final Walkthrough

Drag the handle to see the same addition project from framing day to finished home.

Room addition framed and wrapped during construction by the MAS crew The same home finished, with its new covered front entry
During Finished
What We Build

Addition Options for Every Need

From a single extra room to a full second story, we handle additions of every size. Here is what we build most often.

Blueprint drawings for a home addition floor plan

Room Additions

Need an extra bedroom, home office, or larger living room? We frame, insulate, and finish new rooms that tie into your existing floor plan.

Sunrooms

Bring in natural light with a sunroom addition, a bright space to relax that is built to handle Indiana seasons.

Garages

Attached or detached, we build garages sized for your vehicles, tools, and storage needs.

Bump-Outs

Sometimes you just need a few extra feet. A bump-out can expand a kitchen, bathroom, or closet without a full room addition.

MAS Quality Construction crew framing a second-story home addition
How We Build

From First Sketch to Final Walkthrough

An addition touches your foundation, roofline, and siding, not just one room. Here is how we manage the process.

Design Help

Not sure what will fit or flow well with your home? We help you plan a layout that fits your budget before we ever break ground.

Permits Handled

We manage the full permitting process with the City of Decatur and Adams County so your addition is fully compliant from day one.

Seamless Tie-Ins

We match your addition to the existing roofline and siding so the new space looks built in, not bolted on. Need the whole exterior updated too? We also offer roofing and siding services.

We also keep a clean job site with dust barriers during construction, and we never perform extra billable work without your approval first.

Common Questions

Home Addition FAQs

In most cases, yes. Additions typically require a permit from the City of Decatur or Adams County, depending on where your home is located. We handle that entire process for you as part of the project.
Timelines depend on the size of the addition, the scope of work, and the time of year. Once we scope your project, we provide a written timeline so you know what to expect before work begins.
Matching your existing exterior is a priority on every addition. We work to tie in the roofline and siding so the new space looks like it was always part of your home, whether that means matching brick, vinyl, or LP SmartSide.
No, we never ask for full payment upfront. We typically require a deposit to secure your spot on the schedule and cover materials, with the remaining balance due in stages as work is completed.

Start Your Addition

Ready to add on? Call us directly or request a free estimate.

(260) 223-1004
Get a Free Estimate

Part of a bigger remodel? Explore our home remodeling services.