Best Basement Renovation Companies in Toronto & The GTA — 2026 Edition

If you've spent any time researching basement renovation companies in Toronto or Durham Region, you've already figured out that every contractor claims to be the best. They all have websites that look professional. They all say they do quality work. A lot of them have decent Google reviews.

But the GTA basement renovation market is not what it was two years ago. In February 2025, AGM Renovations — one of the most heavily marketed basement companies in Ontario, endorsed by Mike Holmes and backed by national advertising — permanently closed its doors. Homeowners were left mid-renovation. Deposits were lost. Police investigations are ongoing.

That collapse changed how I think about this article. I've been building basements in Durham Region and the GTA for 20 years. Every year homeowners ask me who else they should consider if BCR isn't the right fit for their project. I've always answered honestly, and I'm going to do that here.

But I'm also going to be direct about something most contractor comparison articles won't say: your criteria for choosing a basement renovation company should be fundamentally different after what happened with AGM.

⚠ Before We Start: What Happened to AGM Renovations

AGM Renovations permanently closed in February 2025. If you found this article by searching for them — they are gone. Their website may still appear in search results. Do not contact any number or email associated with AGM.

Here's what happened: CBC Marketplace investigated AGM after homeowners reported shoddy workmanship, unfinished projects, and electrical safety violations. On February 14, 2025, CEO Ivan Atanasov announced the company was permanently closing — blaming the CBC investigation. Eight homeowners filed a joint lawsuit seeking over $1.3 million in damages. One Oshawa homeowner had his $150,000 loan maxed out with the project only 30–40% complete when AGM closed. Halton Regional Police confirmed an active investigation into complaints against the company.

AGM had Mike Holmes' endorsement. They had 4.7 stars on Google with thousands of reviews. They had a professional website, national marketing, and a strong sales operation. None of it protected homeowners when things went wrong.

That's the lesson. A celebrity endorsement, a high review count, or a polished sales pitch is not due diligence. What protects you is a written fixed-price contract, a real warranty, a verifiable process, and a company with genuine roots in your local market — not a national franchise that can walk away.

How to Actually Evaluate a Basement Renovation Company

Before the company profiles below, here are the criteria I'd use if I were a homeowner hiring a contractor. These matter more than any review score:

• Fixed-price contract or estimate? An estimate can change. A fixed-price contract cannot — unless you change the scope. Always ask which one you're signing.
• Do they pull permits? For any basement renovation in Ontario, permits are required. A contractor who suggests you don't need one — or who leaves it to you — is a red flag.
• What does the warranty actually cover? 'Lifetime warranty' sounds impressive until you read what's excluded. Ask specifically: what's covered, for how long, and who do you call if something fails in year three?
• How long have they been operating in your specific area? A company operating in your municipality for 10+ years has a reputation to protect. A national franchise with regional teams does not.
• What happens if they're late? Most contractors have no financial accountability for delays. A contractor who puts cash behind a timeline actually means it.
• Can you speak to recent past clients? Reviews are useful. A direct conversation with a homeowner whose project was completed six months ago is better.

2026 Comparison at a Glance

Here's a summary of every company in this guide. Full profiles follow below.

BCR Basements / BCR Design Build [✓ ACTIVE]

I'm going to be transparent here: this is my company, and I'm obviously not an objective reviewer of my own work. What I can tell you honestly is what makes BCR different — and let you verify it.

BCR operates on a fixed-price model. The number we give you is the number you pay. We back every project with The BCR Promise — three written guarantees before we start: Fixed-Price (no hidden costs), On-Time (we pay you $1,000 for every week of delay within our control), and Defect-Free (you don't pay the final amount until everything is right). Plus a 7-year warranty.

We're also the hosts of the Basement Authority Podcast — the GTA's only podcast dedicated entirely to basement renovation and legal suite education. We believe the most informed homeowner makes the best client, and we put that into practice before anyone signs anything.

Not every project is a fit for BCR. If you're not sure, read our Right Fit page — we wrote it specifically to help homeowners figure out whether we're the right match before wasting anyone's time.

Best for: Homeowners in Durham Region and the GTA who want a fixed price, written guarantees, and a contractor who treats the project like a business commitment — not a handshake.

Harmony Basements [✓ ACTIVE]

Harmony is one of the more established names in the GTA basement market. Their 3D VR design tool is genuinely impressive — homeowners can walk through a virtual version of their finished basement before construction starts, which reduces surprises and helps with decision-making on finishes.

What stands out about their model: they build with sustainable wall boards and engineered vinyl plank as standard, and they back that with a lifetime warranty on those specific materials. Their HomeStars score (4.6 across 353 reviews) is solid. Their Google score (3.9 across 188 reviews) tells a more mixed story — there are enough negative reviews in there to read carefully.

One interesting data point: a reviewer on their HomeStars page noted they switched to Harmony after signing a contract with AGM and discovering a Facebook group called "Victims of AGM" before cancelling. Harmony handled the project well. That speaks to their operation — but it also illustrates the importance of doing this kind of research before signing anything.

Harmony's primary market is Toronto and Vaughan. Durham Region homeowners should confirm service availability and local project experience before committing.

Best for: Toronto and Vaughan homeowners who want 3D design visualization, a lifetime warranty on specific materials, and a contractor with a long track record in the market.

Penguin Basements [✓ ACTIVE]

Penguin is one of the highest-volume basement contractors in Ontario — they've built over 2,800 basements and complete somewhere between 350 and 500 projects per year. That scale is both a strength and a consideration.

The strength: they have established systems, verified trades, and RenoMark certification — which means a minimum 2-year warranty on all work and at least $2 million in liability coverage. That's a real consumer protection standard, and most smaller contractors don't meet it.

The consideration: at 350–500 projects a year, individual project management becomes harder to guarantee. A homeowner working with Penguin is one of hundreds of active projects. That's not automatically a problem — their systems are built for volume — but it's worth understanding going in.

Their pricing isn't published, which makes comparison harder. For a high-volume contractor with standardized packages, you'd expect a published starting price. The absence of one means you need to get a quote before you can evaluate value.

Best for: Homeowners who want a large established contractor with certified credentials and a structured process, and are comfortable being one of many active projects at once.

Moose Basements [✓ ACTIVE]

Moose Basements gets credit for something most contractors refuse to do: publishing real pricing upfront. $77,000–$85,700 for a 900–1,000 sq ft project is a specific, honest number — not a 'starting from' figure designed to get you in the door. That kind of transparency matters, and it's a practice more companies in this market should follow.

Their HomeStars score (4.9 across 110 reviews) is the strongest in this guide. Their Google score (4.6 across 45) is solid but the review count is lower than some others, which means there's less data to average out outliers.

The missing piece is warranty information. For a contractor at this price point ($77K–$85K+), the absence of a published warranty is worth asking about directly before signing anything. What's covered, for how long, and under what terms?

Moose primarily serves Toronto and York Region. Durham Region homeowners should confirm coverage directly.

Best for: Homeowners who want transparent pricing upfront and a contractor with a strong HomeStars track record. Confirm warranty terms and Durham Region availability before proceeding.

RenoDuck [✓ ACTIVE]

RenoDuck has one of the strongest HomeStars track records in the Toronto market — a 99% score and 10 consecutive Best of Award wins is a hard thing to fake over a sustained period. Their model is built around speed and consistency: 26-day average completion, transparent pricing, 3D floor plan included in the quote process.

Their price point ($35–$55/sq ft) positions them at the lower-to-mid range of the market. For a straightforward basement finish — framing, drywall, flooring, lighting — that pricing is realistic. For a full legal suite with a separate entrance, plumbing, fire separation, and permit management, you'd be at the higher end of their range, and possibly beyond it.

The 2-year workmanship warranty is the industry minimum. It's honest — they're not overstating it — but homeowners should understand what that means for a renovation project that should last 15–20 years.

RenoDuck's footprint is Toronto-focused. They serve the broader GTA but Durham Region homeowners should confirm service availability and project team experience in their specific municipality.

Best for: Toronto homeowners who want a fast, structured, well-reviewed contractor for a mid-range basement finish. Strong on process and communication.

Bedrock Basements [✓ ACTIVE]

Bedrock is a newer entry in this guide but worth including for one specific reason: they explicitly serve Durham Region — Oshawa, Whitby, Pickering, Ajax, and surrounding areas — when most of the better-known Toronto contractors have limited or no presence here.

Recent reviews (late 2025 and early 2026) are genuinely positive — "professional, efficient, and detail-oriented" from a partial renovation completed in late 2025. One reviewer specifically mentioned working directly with a project manager focused solely on their project, which is a meaningful distinction from high-volume contractors where individual attention can be harder to guarantee.

The gaps: pricing isn't published, and there's less historical review data than the larger players in this guide. That means less to average out — a smaller sample size of reviews is less reliable as a trust signal than 200+ reviews over several years. Do your due diligence on warranty terms and ask for references from completed projects in your specific area.

Best for: Durham Region homeowners specifically — Oshawa, Whitby, Pickering, Ajax. Worth considering if you want a contractor with confirmed local coverage who isn't a high-volume operation.

CSG Renovation [✓ ACTIVE]

A 5.0 Google rating is notable — it's hard to sustain at any meaningful review volume. CSG's 5-year warranty is above the industry standard and worth noting. They handle a broad range of renovation work beyond basements, which means they may appeal to homeowners who want one contractor relationship for multiple projects.

The lack of published pricing and the broader service scope make it harder to evaluate them specifically as a basement specialist. Ask about their basement-specific project volume and request references from basement projects similar in scope to yours.

Best for: GTA homeowners who want a highly-rated general contractor with a 5-year warranty and the ability to handle multiple renovation types.

Desire Basements [✓ ACTIVE]

Desire Basements sits at the high end of the review spectrum — 4.9 on Google is impressive — and a lifetime warranty is a strong statement. Their focus on custom finishing and second suites aligns with where the market is heading in the GTA, given ongoing demand for legal rental units.

Like several others in this guide, pricing isn't published, which makes it harder to evaluate fit before getting into a quote conversation. Ten years of operation is meaningful but on the shorter end relative to some competitors.

Best for: GTA homeowners prioritizing custom finish quality and a strong review track record. Ask about specific legal suite experience and confirm what the lifetime warranty covers in writing.

Assured Basements [✓ ACTIVE]

Assured's warranty structure is unusual and worth understanding: a 2-year service warranty on workmanship, combined with 30-year warranties on specific materials (floors and tiles). That long-term material warranty is a meaningful differentiator if the materials themselves are the ones covered in your project.

Their published pricing for legal basement apartments ($55–$75/sq ft) gives you a working number to evaluate. At the lower end of that range for a legal suite, expect basic finishes. The upper end starts to approach realistic territory for a compliant, permitted secondary unit.

Experience is not publicly disclosed, which is a gap. Ten years in operation is verifiable. Twenty is more credible. Unknown experience level requires more due diligence from the homeowner.

Best for: GTA homeowners focused specifically on legal basement apartments who want a published price range and a long-term material warranty. Verify years of operation and request references before proceeding.

AGM Renovations — PERMANENTLY CLOSED (February 2025)

Do not contact AGM Renovations. The company permanently closed in February 2025. Any website, phone number, or email address associated with AGM should not be contacted. If you are an affected homeowner, see the resources below.

AGM was one of the highest-profile basement renovation companies in Ontario. Endorsed by Mike Holmes. Thousands of Google reviews. A professional website. A CBC Marketplace investigation revealed electrical safety violations, shoddy workmanship, and unfinished projects — then the company closed abruptly, leaving homeowners with no recourse.

The AGM collapse is the reason every other section in this article exists. When a company with that level of marketing and review volume can fail that badly, it tells you that the standard ways homeowners vet contractors — review scores, website polish, celebrity endorsements — are not sufficient.

If you are an AGM customer who is owed work or a refund:

• Consumer Protection Ontario — file a complaint and understand your rights under the Consumer Protection Act.
• Financeit — if you financed through Financeit, contact them directly about your situation. Some affected homeowners have had partial recourse through the lender.
• CBC's coverage — the full Marketplace investigation documents the collapse and includes contact information for the journalists covering the story.

How to Choose — The Questions That Actually Matter

After 20 years in this industry, here are the questions I'd ask any contractor — including BCR — before signing:

• Is this a fixed-price contract or an estimate? If it's an estimate, ask specifically: what conditions could cause the price to change, and by how much? Get it in writing.
• Who pulls the permits, and who manages the inspections? This should be the contractor, not you. If they're leaving permit management to you, they're reducing their accountability for code compliance.
• What does the warranty specifically cover? Ask for the warranty in writing before you sign, not after. Read what's excluded.
• What is the financial consequence if the project is late? If there's no answer, the contractor has no real accountability for your timeline.
• Can I speak to three recent clients directly? Not just review links — an actual conversation with a homeowner whose project finished in the last 12 months.
• How long have you been operating in my specific municipality? A contractor who's built 50 basements in Oshawa knows local permit timelines, inspector expectations, and supplier relationships that a GTA-wide contractor may not.

Ready to Talk About Your Basement?

If BCR sounds like a potential fit — or if you're not sure yet and just want honest answers about what your project would involve — the right first step is a conversation, not a commitment.

Book a free 20-minute Planning Call — no obligation, no pressure. We'll tell you whether your project is a fit for BCR, what it would realistically cost, and what questions you should be asking every contractor you talk to.

Or use our Basement Cost Calculator to get a ballpark number based on your space and goals before you call anyone.

Every BCR project is backed by The BCR Promise — Fixed-Price, On-Time (with a $1,000/week penalty if we're late), and Defect-Free, in writing. Plus a 7-year warranty. It's not a sales pitch. It's what we put in the contract.