This list ranks 10 basement renovation companies in Calgary, AB. It starts from Google Maps searches for basement renovations and related building work in Calgary: 98 firms were checked, and building and renovation firms with their own website and an open Google listing went forward. Firms are weighed on their Google rating, the number of reviews behind it, how closely their services match basement renovation, and their portfolio. The strongest firm overall sits at place 1, places 2 to 4 carry a badge for what each suits best, and places 5 to 10 run in order. Ratings and review counts are Google's, checked October 14, 2026. How we rank
Calgary basement development and renovation company working across the city and surrounding area, plus general home renovations.
Calgary basement development company finishing basements and building legal basement suites in Calgary, Airdrie, Okotoks, Chestermere and Cochrane.
Family-owned Calgary general contractor doing residential and commercial renovations, new builds, basement development, handyman work and design and drafting.
Calgary basement development company that shows each basement in photorealistic renderings before signing and builds to a guaranteed 13-week schedule.
Owner-run Calgary renovation contractor doing basement developments, secondary suites, kitchen and main-floor renovations, bathroom remodels and exterior projects.
Calgary basement contractor focused on basement developments, legal basement suites and home renovations, run through a four-stage process.
| Rank | Firm | Best for | Services | Google rating | Area |
|---|---|---|---|---|---|
| 01 | SBS Basement | Basement developments from framing to finish | Basement developments · Basement renovations · Home renovations · Framing and drywall | Rated 5.0 out of 5 from 93 Google reviews | Calgary |
| 02 | Basement Builders | Legal basement suites | Basement development · Legal basement suites · Basement renovations · Basement design | Rated 4.9 out of 5 from 301 Google reviews | Calgary |
| 03 | Joshua General Contracting | Basements with in-house drafting | General contracting · Residential renovations · Commercial renovations · Basement development · Design and drafting | Rated 4.9 out of 5 from 381 Google reviews | Calgary |
| 04 | ReImagine Builders | Basements rendered before signing | Basement developments · Legal suites · Basement bathrooms · Bars and built-ins | Rated 4.9 out of 5 from 171 Google reviews | Calgary |
| 05 | Two Studs Renovations | Basement developments and secondary suites | Basement developments · Secondary suites · Kitchen renovations · Bathroom remodels · Exterior projects | Rated 5.0 out of 5 from 39 Google reviews | Calgary |
| 06 | Remarkable Projects | Legal basement suites for rental use | Basement developments · Legal basement suites · Home renovations · Kitchen renovations | Rated 5.0 out of 5 from 29 Google reviews | Calgary |
| 07 | The Basement Makers and Renovators | Legal basement suites and basement developments | Basement developments · Legal basement suites · Home renovations · Kitchen renovations · Bathroom renovations | Rated 4.9 out of 5 from 44 Google reviews | Calgary |
| 08 | Sterling Pro Construction | Renovations in Chaparral and Brighton | Basement development · Bathroom renovations · Kitchen remodelling · Deck and fence repair | Rated 4.9 out of 5 from 57 Google reviews | Calgary |
| 09 | Brown Boys Building Developers | Basement and garage suite developments | Basement development · Legal basement suites · Garage suites · Custom homes · Landscaping | Rated 4.8 out of 5 from 85 Google reviews | Calgary |
| 10 | Knight Custom Homes | Additions with in-house carpentry | Home additions · Full-home renovations · Kitchen renovations · Bathroom renovations · Basement renovations | Rated 5.0 out of 5 from 27 Google reviews | Calgary |
Five things to confirm with any firm, on this list or not, before you sign. The rules below are Alberta's and Calgary's.
Ask the firm for a clearance letter from WCB-Alberta, which confirms it is registered for workers' compensation and its account is in good standing. WCB-Alberta advises getting one before the firm starts and again before the final payment, because the hiring party can end up owing premiums on an account that is not in good standing.
Ask for a certificate of insurance that names the firm and shows commercial general liability coverage in force for the dates of your job, and check that the subcontractors it brings in are covered too.
Building permits for homes in Calgary come from the City of Calgary, and finishing a basement or adding a secondary suite usually needs one. Agree in writing who applies for the permit and books the inspections.
Get the scope of work, the payment schedule tied to stages of the work, start and finish dates, how changes are agreed and priced, and who handles permits and cleanup, all in one signed contract before any work starts.
A renovation is not a new home, so the new home warranty rules usually do not apply: get the firm's own workmanship warranty in writing, with what it covers and for how long. Renovators in RenoMark, the Canadian Home Builders' Association program, offer a minimum two-year warranty on their work.
The 10 firms on this list fall into 4 groups, read from what each firm's own site says it does and how it is listed on Google.
Basement specialists work mainly on basements, from family rooms to secondary suites.
General contractors run building projects of many kinds and bring in the trades each job needs.
Renovation companies renovate existing homes, one room at a time or all of it at once.
Home builders build new houses as their main work, and some take on additions and major renovations too.
It is the term Alberta builders and homeowners use for finishing an unfinished basement: framing, insulation, electrical, plumbing, drywall and flooring, often with a bedroom, bathroom or family room. Elsewhere it is usually called a basement renovation or basement finishing.
In many Canadian cities, yes, but a legal secondary suite has to meet the building code and local zoning, including a separate entrance, ceiling heights, fire separation, smoke alarms and egress windows. It needs a permit and inspections, so ask the firm whether it has built legal suites in your city.
Deal with water before finishing: grading and downspouts that carry water away from the house, a working sump pump where the house has one, and repairs to foundation cracks. Then insulate and frame in a way that handles moisture. Ask the firm what it checks before it starts framing.
Usually. A basement bathroom needs a drain connection, which can mean breaking the concrete floor to reach the main drain, or a pump system where the drain sits higher than the floor. The plumbing work needs a permit and inspection.
Ask the firm for a clearance letter from WCB-Alberta. WCB-Alberta advises getting one before the firm starts and again before the final payment, because the hiring party can end up owing premiums on an account that is not in good standing.
Building permits for homes in Calgary come from the City of Calgary. For basement renovation, finishing a basement or adding a secondary suite usually needs one. Many firms apply for the permit as part of the job, so agree who does it before you sign.
What finishing or developing a basement costs in Toronto, Calgary, Edmonton and Vancouver in 2026: prices by size, add-ons, permit fees and the big-ticket scopes.
What a legal basement suite, second unit or basement apartment costs to build or legalize in Calgary, Edmonton, Toronto and Vancouver in 2026, and which code items set the price.
The code and zoning rules a basement suite, second unit or basement apartment has to meet in Ontario, BC and Alberta: ceiling height, fire separation, alarms, exits, heating and how many units a lot can hold.
Send the detail that is out of date, or the name and website of a firm that belongs here.
