Castle Building & Remodeling is a locally owned Minneapolis remodeler that works exclusively on older urban homes in the Twin Cities, handling kitchens, bathrooms, basements, attics, additions, porches and decks, and whole-house renovations. It keeps a licensed architect and experienced designers on staff, guarantees upfront pricing and completion dates, and uses an in-house construction team to carry each project from plan to completion.
Home Additions in St. Paul, MN
7 vetted design-build firms serving St. Paul · how we vet & rank
Home Additions in St. Paul
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.
Top Home Addition Contractors Serving St. Paul
JJH Homes is a custom home builder and remodeler in the greater Twin Cities, in business since 2007 and based in Blaine. The company builds custom homes it describes as beautifully designed, energy-efficient, and designed specifically for each family's lifestyle, and also takes on full home, kitchen, and bathroom remodels. Its process runs from a one-on-one consultation through design, development, and after-care follow-up.
Founded in 2000, McDonald Remodeling is a full-service design/build firm based in Inver Grove Heights with a dedicated interior design studio, building on values cultivated since Jim McDonald built his first home in 1976. The team works on projects of all sizes — bathrooms, kitchens, additions, lower levels, and whole-home remodels — serving St. Paul, Minneapolis, the surrounding metro area, and western Wisconsin. Its contract includes one-year workmanship, two-year mechanical, and ten-year structural warranties, and its site describes the firm as one of the most awarded home remodelers in the Twin Cities.
Prima Construction is a woman-owned remodeling contractor based in Columbia Heights, specializing in custom kitchens and baths for older homes in Minneapolis, St. Paul, and the surrounding areas — early-1900s through 1920s houses are its stated specialty. Owner Kim Studham holds multiple architecture degrees and does most of the hands-on building herself with an in-house team rather than a chain of subcontractors, while her husband Scott leads the design. The firm puts a fixed price in writing before construction begins, and its site lists Guildmaster with Highest Distinction Awards (2021-2024 and 2026) for customer satisfaction.
Quartersawn Design Build is a Minneapolis design and build remodeling firm founded in 2005 by Jeff and Leslie Nicholson above their home garage, since grown to a team of over 25 craftspeople. Each project gets a dedicated three-person team and follows the firm's seven-step process through design and construction, with kitchens, additions, and whole-home remodels — including over 200 completed whole-home renovations across the Twin Cities — in neighborhoods from Minneapolis and Saint Paul to Edina and out to Medina.
Scala Design & Construction is a design-build remodeling firm founded in 2009 and based in Shorewood, with 500+ projects completed across Minneapolis, St. Paul, and the surrounding metro. Its services span kitchen remodeling, bathroom remodeling, basement finishing, full home renovations, and home additions, with design and construction managed by the same team and a detailed fixed-price estimate before work begins. The company is a member of the National Association of the Remodeling Industry and holds Minnesota residential building contractor license BC791994.
TreHus Architects + Builders is an architect-led design-build firm founded in 1982 by Dave Amundson, a descendant of Norwegian craftsmen. Now a full-service design-build remodeling company celebrating 44 years, it puts residential architects, interior designers, project managers, and on-staff craftsmen on one team for whole-home renovations, kitchen and bath remodels, additions, and custom homes. Its Master Carpenter system lets carpenters focus entirely on their craft while project managers handle the details, and the Golden Valley-based firm serves homeowners throughout Minneapolis, Edina, Minnetonka, and the surrounding Twin Cities area.
Home Addition Cost in St. Paul
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.
Process & Timeline
- Design & scope. A design-build firm develops plans, selections, and a fixed scope before construction pricing. Expect several weeks of design for anything beyond a cosmetic refresh.
- Permits. Your contractor pulls city permits for plumbing, electrical, and structural work. This is non-negotiable in St. Paul.
- Construction. Timeline depends on scope; see the FAQ below for typical durations. Good firms give you a milestone schedule and a named project lead.
- Punch list & inspection. Final inspections close the permits; a written warranty (1 year workmanship is standard in MN) should back the work.
Frequently Asked Questions
How much does a home addition cost in St. Paul?
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. St. Paul'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.
How many home addition contractors serve St. Paul?
We currently list 7 design-build remodelers handling home additions in St. Paul. All are being verified against Minnesota's contractor licensing records as we expand the directory.
Do I need a permit for a home addition in St. Paul?
Almost always, yes. Any project touching plumbing, electrical, structure, or egress requires permits and inspections in St. Paul. A legitimate contractor pulls the permits themselves — treat any suggestion to skip permitting as a red flag.
How long does a home addition take?
Additions typically run 3–6 months of construction depending on size and season; foundation work in a Minnesota winter needs experienced scheduling.
Get matched with home addition contractors in St. Paul
Tell us about your project and we’ll shortlist up to 3 vetted local builders that fit your city, budget, and timeline.
Home Addition Contractors in Nearby Cities
Planning new construction instead? See St. Paul home builders.