A single story addition is the most common project Twin Cities Exteriors builds for homeowners across Elk River, Otsego, Rogers, St Michael, Albertville, Monticello, Maple Grove, Plymouth, Corcoran, and St. Paul. Families outgrow their main floor before they outgrow their lot, and a single story addition adds a new kitchen, primary suite, family room, or home office without the added structural evaluation that comes with building a second story.
That doesn't mean it's a simple project. A single story addition still means new foundation work engineered for Minnesota's frost depth, framing that has to tie cleanly into the existing house, and a roofline connection that has to shed water correctly for decades, not just look good on move-in day.

We believe your home's exterior should perform as good as it looks. Functioning together as a beautifully-integrated system. This means your roof is much more than just shingles and plywood, and that a new single story addition has a deeper meaning than simply additional square footage. From looking to upgrade your old, faded vinyl siding, to expanding your summer grilling set-up with a brand new composite deck. Twin Cities Exteriors' 11 years of hands-on, industry specific experience, makes us the go-to provider for all things exteriors in the NW Metro.
Single story additions still require approved plans from the City of Elk River before excavation starts. Plans need to meet Minnesota State Building Code requirements and be drawn to scale showing the full scope of the addition. Twin Cities Exteriors manages the permit application and inspection scheduling as part of the project, so homeowners aren't tracking down approvals on their own.
New foundation built for Minnesota conditions: Every single story addition starts below the surface. Elk River requires foundations to reach a minimum frost depth of 42 inches, and the soil conditions across the NW Metro vary enough from lot to lot that a foundation plan built for one home doesn't automatically work next door. Twin Cities Exteriors designs and pours a new foundation section engineered specifically for your property before framing ever starts.
Framing that reads as one structure, not two: The framing on a single story addition has to connect to the existing house at the header, the wall lines, and often the floor system. Getting this wrong is how additions end up with the telltale sag or seam where old meets new. Twin Cities Exteriors frames every addition to function structurally as one continuous house.
Roofline integration: Where a new roof ties into the existing one is one of the most common places additions leak, especially on single story additions built against a taller existing roofline. This connection is planned at the design stage, with flashing and roof pitch worked out before construction begins, not improvised once framing is already up.
Exterior finishes that match: Siding, trim, and window selections are chosen to match or intentionally complement your existing exterior, so the addition reads as part of the home. Twin Cities Exteriors handles siding and windows directly as part of the addition, so there's no gap between the crew that built the structure and the crew that finishes it.
Expanded kitchen with more counter and storage space
New primary suite with a private bath
Family room or main floor living space
Home office or main floor bedroom for aging-in-place needs
Second Story Add-Ons: Sometimes you'd rather build up than out, which requires a structural evaluation of the existing foundation and framing to determine what reinforcement is needed before construction begins.
Mother-In-Law Suites and Smaller Expansions: For additions that don't require a full new foundation system, a bump out can add meaningful space, like an expanded kitchen or primary suite, with a smaller structural and permitting footprint.
Garage Additions: Finally building that She-Shed? Or man cave, depending on your style. Either way, attached garage additions involve the same foundation, framing, and roofline tie in considerations as living space additions, with the added complexity of coordinating the connection to the existing house envelope.
The City of Elk River requires approved plans before any addition work starts, and Twin Cities Exteriors handles the permit process as part of the project. The foundation gets designed for Minnesota's frost depth requirements, which run a minimum of 42 inches in this area, before a shovel touches the ground.
Twin Cities Exteriors evaluates whether the existing framing, including load bearing walls and floor joists, can support the new construction or needs reinforcement first. This step determines what the addition can realistically be before design decisions get locked in.
How the new roof ties into the existing one is planned at the design stage, not figured out once framing is underway. This connection point is one of the most common sources of leaks in additions when it's improvised rather than planned.
Siding, trim, and window selections are chosen to match or intentionally complement the existing exterior, so the addition reads as part of the house rather than an obvious add on. For more information on our siding process, click HERE.
Permitted addition work goes through inspection stages tied to foundation, framing, and final completion. Twin Cities Exteriors coordinates each inspection and walks through the finished space with the homeowner before calling the project done.
Timelines depend on the size of the addition and the scope of foundation and roofline work, but most single story additions in the Elk River area move from permitted plans through final inspection over the course of a construction season. Twin Cities Exteriors walks through a project-specific timeline during the quote process.
Most single story additions that expand the home's footprint require a new foundation section engineered for the site's frost depth and soil conditions. Smaller bump outs may not require a full new foundation. See our Mother-In-Law Suites and Smaller Expansions page for more on that option.
Yes. Matching siding, trim, and window styles to your existing exterior is part of the design process so the addition integrates visually rather than reading as a separate structure.
Matching siding, trim, and window styles to the existing exterior is part of the design process so the addition integrates visually rather than looking like a separate structure attached to the house. Twin Cities Exteriors handles siding and windows directly, so those selections get made by the same crew doing the structural work.

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