4 vetted design-build firms serving Chaska · how we vet & rank
Additions add true square footage — primary suites, family rooms, mudrooms, or a second story. They are structurally the most involved remodel category, requiring foundation work, framing into the existing structure, and careful matching of exteriors.
Family-owned since 2004, Shakopee’s Xpand builds custom homes through its Homes of Xcellence division alongside remodels, additions, sport courts, and aging-in-place work across the southwest metro.
A four-generation Minnetonka design-build firm with 70+ years of history, Boyer Building runs full-time carpentry crews and a licensed architect for custom homes and remodels across the west metro.
Hansen Hometech — doing business as Hansen Builders — has remodeled southwest-metro homes from Chanhassen since 1980, focusing on additions, kitchens, and baths, with historical restoration in the mix.
Family-run since 1996, Castle Gate Construction handles home building and remodeling from its Victoria base — kitchens, baths, additions, lower levels, and new builds for the southwest metro.
Additions in the Twin Cities typically run $300–$500+ per square foot all-in, with second-story additions and complex tie-ins at the high end.
Additions in the Twin Cities typically run $300–$500+ per square foot all-in, with second-story additions and complex tie-ins at the high end. Chaska's older housing stock can add scope — outdated wiring, plaster, and framing surprises are common in pre-war homes, so build contingency into the budget.
We currently list 4 design-build remodelers handling home additions in Chaska. All are being verified against Minnesota's contractor licensing records as we expand the directory.
Almost always, yes. Any project touching plumbing, electrical, structure, or egress requires permits and inspections in Chaska. A legitimate contractor pulls the permits themselves — treat any suggestion to skip permitting as a red flag.
Additions typically run 3–6 months of construction depending on size and season — foundation work in a Minnesota winter needs experienced scheduling.
Tell us about your project and we’ll shortlist up to 3 vetted local builders that fit your city, budget, and timeline.
Planning new construction instead? See Chaska home builders.