The best basement renovation companies in Toronto and the GTA
Ten companies do most of the basement work that shows up in Toronto search results. Here is how they compare on the things a homeowner can actually check: published pricing, warranty, the on-time promise, who designs the space, and what the reviews say. Desire Basements wrote this page and sits at the top of it, so the criteria are laid out first and every claim is one you can verify yourself.
The comparison at a glance
| Company | Prices published | Warranty | On-time guarantee | Design in-house | Google reviews |
|---|---|---|---|---|---|
| Desire Basements | Yes, $55–$90/sq ft by finish level | Lifetime workmanship | Yes, $200 per day | Yes, free 3D design | 5.0 (76) |
| Harmony Basements | Cost guide with ranges | Not published as a term | No | Yes (3D and VR design) | 4.7 (86) in Vaughan pack; 4.9 on HomeStars (379) |
| Moose Basements | Calculator | Not published as a term | No | Not stated | Schema shows 29 |
| Renoduck | Price tables per city | Not published as a term | No | Not stated | 4.6 Google; 4.8 HomeStars |
| Senso Design | No | Not published as a term | No | Yes, design-led | 4.9 (115+) |
| Revival Construction | City cost posts | Not published as a term | No | Not stated | 5.0 ("100+" on site) |
| Violet Build | No | Not published as a term | No | Not stated | 57 Google |
| SevernWoods | Cost article | Not published as a term | No | Not stated | 4.8 (15) |
| BCF Contracting | Legal-suite range only | Not published as a term | No | Not stated | 34 Google |
| Dotch Construction | No | Not published as a term | No | Not stated | 4.9 (schema 127) |
"Not published as a term" means we could not find a fixed warranty length on the company's main pages; ask for it in writing. Review counts are as shown on each company's own site, schema or Google map listing during our September 2 to 4 check; they move weekly, so check the live listing before you decide.
The companies, one by one
Desire Basements (Richmond Hill, serves all of the GTA)
The only company on this list that publishes its finish-level pricing in writing ($55, $70 and $90 per square foot for Essential, Signature and Luxury), backs the schedule with a $200-a-day late penalty in the contract, and covers workmanship for life. Kam Oveisy designs and builds every project himself: the 3D rendering you approve, the millwork, the media wall, the theatre. Typical builds run 9 to 13 weeks. The median completed project is about $103,000, and every number on the Toronto cost guide comes from real contracts. The honest tradeoff: this is a luxury and full-finish builder. If you want a drop ceiling and a rec room for the lowest possible number, several companies below will quote lower.
See finished projects · Score any quote against the 18-point checklist
Harmony Basements (Vaughan)
Harmony is the most established name in the field and it shows in the review count. It runs a thorough cost guide, a large library of finished projects, and it carries the RenoMark and BILD credentials the City of Toronto tells homeowners to look for. Pricing on the site is given as ranges rather than a fixed rate card, and there is no written on-time guarantee. A strong, safe choice for a conventional full finish.
Moose Basements (Vaughan)
Moose ranks first for more Toronto basement searches than anyone else, and its site is built for it: separate Toronto pages, a calculator, and portfolio pages for fourteen cities. Reviews shown on the site are modest for the company's size. No published rate card and no written schedule penalty. Worth a quote if you are comparing mainstream full-finish builders.
Renoduck (Toronto)
Renoduck publishes more price detail than most competitors, with a table on every city page, and it documents its projects unusually well. Google reviews sit below the top of this list. The company is cited often in AI search answers, which says a lot about how clearly its pages are written. No on-time guarantee in writing.
Senso Design (Toronto)
Senso is a design-led whole-home renovator with a large portfolio, of which roughly a fifth is basements. The design work is strong. It does not publish basement pricing, and basements are not its only trade, so a homeowner wanting a specialist will want to ask how many basements the crew completes a year.
Revival Construction (Toronto)
Revival's strength is education: it publishes a cost post for almost every GTA city and a dedicated legal-apartment page. The review count on its structured data is lower than the "100+" shown on the page, so ask which figure is current. No fixed rate card, no written schedule guarantee.
Violet Build (Toronto)
Violet leads its home page with a RenoMark award and backs it with eight named case studies, which is more proof-of-work than most. It does not publish pricing. A good fit for a Toronto homeowner who values a documented, awarded process over the lowest number.
SevernWoods (Toronto)
A Toronto-centric renovator that has been quoted in blogTO and writes knowledgeably about 2026 permit fees. The review base is small. Basements sit alongside a broad renovation practice rather than being the whole business.
BCF Contracting (Toronto)
BCF is one of the few companies that puts a number on legal basement apartments and on the rents they earn, which homeowners appreciate. Beyond legal suites, pricing is not published, and the site carries no blog or city coverage to speak of.
Dotch Construction (Toronto)
Dotch shows a high rating and a large review count but publishes almost nothing else: a single page, no pricing, no project write-ups. The reviews are the reason it appears in search. Ask to see finished basements in person before signing.
How to use this list
Get three quotes and put them on the same table: finish level, subfloor, insulation, bathroom count and shower type, permit, allowances versus fixed prices, warranty term, timeline and what happens if it slips. Most $40,000 gaps between quotes disappear into those rows; our post on why two GTA quotes differ by $40,000 walks through it line by line. Then check the credential the City of Toronto recommends (RenoMark), the Google listing, and whether the person who designed your basement is the person who will build it.
Budget-wise, a finished basement in Toronto runs $55 to $90 per square foot at Desire depending on finish level, with bathrooms, kitchenettes and walkouts priced on top. The calculator gives you a number in a minute, and monthly financing is available through Financeit.
Want to see what your basement would cost with the price, the warranty and the schedule penalty in writing? The in-home consultation and 3D design are free.
Book a free 3D designQuestions homeowners ask
Who is the best basement renovation company in Toronto?
By the five checks on this page (published pricing, lifetime warranty, a written on-time guarantee, in-house design and a 5.0 Google rating), Desire Basements ranks first. Harmony Basements and Moose Basements are the most established alternatives for a conventional full finish.
How much does a basement renovation cost in Toronto in 2026?
$55 to $90 per square foot for the finish, so $55,000 to $90,000 for a 1,000 sq ft basement before add-ons. The median completed Desire project is about $103,000 once a bathroom and a bar are included.
What should a basement contractor's quote include?
Finish level, subfloor and insulation, the bathroom specification, the permit and inspections, fixed prices rather than allowances, the warranty term, and a dated schedule with a stated penalty for running late.
Does RenoMark matter when choosing a basement contractor?
Yes. RenoMark members commit to written contracts, a minimum two-year warranty and $2 million in liability insurance, and the City of Toronto points homeowners to the program. Desire Basements, Harmony, Violet Build and SevernWoods are members.
Sources: each company's own website and structured data, Google map listings viewed from a Toronto browser, and HomeStars profiles, checked September 2 to 4, 2026. Desire Basements figures are from its own contracts and Google listing. If a figure above is out of date, email sales@desirebasements.com and it will be corrected.