Home Additions
Room additions in Sioux Falls, drafted and permitted under one contract
Sioux Falls, South Dakota
One licensed contractor takes your addition from drafting through City of Sioux Falls permits to the finished build.
5.0 across 25 Google reviews · Licensed & insured · BBB Accredited, rated A · TimberTech PRO Gold contractor
If your house is short a bedroom, a bigger kitchen, or a main-floor bath, you have two options: move, or add on. In Sioux Falls, adding on often makes the stronger case. The city's central neighborhoods carry a deep stock of mid-century and older homes on lots people don't want to give up, and the cost of moving up in today's market can outrun the cost of building the space you're missing. An addition keeps your lot, your neighborhood, and your school routes, and puts the money into square footage you actually chose.
The drawings are where that money is won or lost. Roof line, foundation, and where the new load comes down get settled on paper and through plan review before anything is dug. An addition drawn to match the existing roof pitch and siding reveal stops reading as an addition at all — that match is a drafting decision, not a finish decision.
Tell us what you're building.
Two required fields. Jace follows up directly to set a walkthrough.
Or call or text (605) 679-5223.
Rather not wait for a callback?
Pick a time for your estimateRather talk to an agent after hours?
Call the same number after hours — our phone agent picks up, takes the details and books your walkthrough on Jace's calendar.
Built to match, not bolted on
The difference between an addition and an obvious add-on is how well it matches the original house. On Sioux Falls' mid-century and older homes, that means tying the new roofline into the existing pitch, matching siding profiles and window proportions, and getting floor heights to line up where the two structures meet. It also means foundations poured on footings below the frost line, because South Dakota's freeze-thaw cycles will move anything shallower and open a crack right where new framing meets old. We draft the addition around the house you have, then build it so the seam disappears.
One contract from drawings to final inspection
An addition in city limits runs through City of Sioux Falls permitting: plans submitted, permits pulled, and inspections passed at each stage. We handle that paperwork because we drew the plans, so there's no back-and-forth between a designer and a builder reading each other's work. Financing is available on qualifying jobs. Related work we handle on additions:
Drafting and plans · Siding · Decks and porches · Kitchen remodels
Screened porch addition under its own gable — full-height screen walls over a black-baluster half wall, with a stair entry down to the yard. 
Sunroom-and-balcony addition on the back of a two-story home, the new roofline tied into the existing house over the patio below. 
The same sunroom addition, straight on at dusk — window wall over the walkout patio, the finished lower level behind it.
5.0
Twenty-four reviews. Every one of them five stars.
Highly recommend Hols & Co. if you are looking for someone to build your deck. The whole team was excellent to work with. They were professional, respectful and communicative. They were very efficient when they were on site and kept out property clean while they worked. Solid craftmanship and the finished product is exactly what we were envisioning. We would definitely hire this crew again for future projects.
Carrie Janssen C. · July 2026 · Deck build The team was great. The quality of work is fantastic. I saw their ad on social media and took a chance and contacted them. So glad I did! Wanted my back deck replaced and they did a beautiful job. Even worked Saturday because the wood for the deck didn't show up on time. Looking forward to having them back for my next project!
Laura · July 2026 · Deck replacement Hols and Co. replaced our deck with a covered and screened in deck. We are extremely pleased with the workmanship and attention to detail they put into the deck. They were a pleasure to work with and would definitely recommend them for your home construction needs. Myron H.
Myron H. · July 2026 · Covered + screened deck
Fair questions, straight answers.
Do I need a permit to build a home addition in Sioux Falls?
Yes. Inside city limits, an addition needs a building permit from the City of Sioux Falls, and the work is inspected at set stages of the build. Hols & Co prepares the drawings, submits them, and pulls the permit as part of the project, so approval runs through one contractor. If the project also touches the driveway or sidewalk in the city right-of-way, that portion requires the city's right-of-way contractor approval, which we hold.
When should I start planning a home addition in Sioux Falls?
Earlier than you'd think. South Dakota's building season is short and foundation work needs thawed, workable ground, so the drawing and permitting phase is best done over winter. Drafting, City of Sioux Falls plan review, and permit approval all take calendar time before a shovel moves. Starting the walkthrough and plans in fall or winter positions the build to break ground in spring, when footings and concrete can go in.
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Ready when you are.
Calls answered after hours and on weekends.