21 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Duncan: Basement Systems Vancouver, CR Score 55/100; 4.9★ from 80 Google reviews.
Best for emergencies (open 24/7): HomeWise Plumbing & Drainage - Sooke/Westshore, posts 24/7 hours; ranked #2 of 21.
Most-reviewed: HomeWise Plumbing & Drainage - Sooke/Westshore, 120 Google reviews at 4.5★, the most of 21 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
21 Duncan foundation repair companies are ranked here by CR Score, from ten published factors. 3 are open 24/7, 9 open Saturdays and 5 open Sundays, based on posted hours. The median Google rating is 4.9★ across 21 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Basement Systems Vancouver | 55 | 4.9★ (80) | Delta, 63 km away | — | Overall |
| 2 | HomeWise Plumbing & Drainage - Sooke/Westshore | 55 | 4.5★ (120) | Sooke, 48 km away | 24/7 | Emergencies, Most reviews |
| 3 | Cardinal Roofing and Waterproofing ltd | 53 | 5.0★ (4) | Nanaimo, 19 km away | 24/7 | — |
| 4 | Van-Isle Coating & Sealants | 53 | 5.0★ (9) | Victoria, 44 km away | Sat | — |
| 5 | Island Basement Systems | 52 | 4.4★ (34) | Colwood, 57 km away | — | — |
| 6 | CWS - Canadian Waterproofing Systems | 52 | 3.9★ (10) | Victoria, 46 km away | 24/7 | — |
| 7 | RainTek Drainage & Waterproofing | 50 | 4.6★ (33) | Victoria, 44 km away | — | — |
| 8 | Cunningham Sealing Ltd. | 50 | 4.6★ (9) | Richmond, 55 km away | — | — |
| 9 | Your Friendly Neighbourhood Roofer | 50 | 4.9★ (9) | Nanaimo, 30 km away | Sat · Sun | — |
| 10 | Sublime Sundecks | 49 | 5.0★ (28) | Nanaimo, 49 km away | Sat | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 80 Google reviews, listed on Google as “Waterproofing service”.
Based in Sooke, 48 km away
Ranked #2 because of its Google rating and review volume: 4.5★ from 120 Google reviews, the most in Duncan.
Based in Nanaimo, 19 km away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Roofing contractor”.
Based in Victoria, 44 km away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Waterproofing service”.
Based in Colwood, 57 km away
Ranked #5 because of its Google rating and trade focus: 4.4★ from 34 Google reviews, listed on Google as “Waterproofing service”.
Based in Victoria, 46 km away
Ranked #6 because of its Google rating and trade focus: 3.9★ from 10 Google reviews, listed on Google as “Roofing contractor”.
Based in Victoria, 44 km away
Ranked #7 because of its Google rating and review volume: 4.6★ from 33 Google reviews.
Based in Richmond, 55 km away
Ranked #8 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Waterproofing service”.
Based in Nanaimo, 30 km away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 9 Google reviews, listed on Google as “Roofing contractor”.
Based in Nanaimo, 49 km away
Ranked #10 because of its Google rating and review volume: 5.0★ from 28 Google reviews.
Based in Nanaimo, 59 km away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “General contractor”.
Based in Victoria, 46 km away
Ranked #12 because of its Google rating and review volume: 4.7★ from 32 Google reviews.
Based in Richmond, 57 km away
Ranked #13 because of its Google rating and review volume: 5.0★ from 36 Google reviews.
Based in Victoria, 47 km away
Ranked #14 because of its Google rating and review volume: 5.0★ from 22 Google reviews.
Based in Nanaimo, 44 km away
Ranked #15 because of its Google rating and review volume: 4.5★ from 28 Google reviews.
Based in Victoria, 45 km away
Ranked #16 because of its Google rating and review volume: 4.9★ from 14 Google reviews.
Based in Salt Spring Island, 34 km away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Concrete contractor”.
Based in Victoria, 37 km away
Ranked #18 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Roofing contractor”.
Based in North Cowichan, 18 km away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Concrete contractor”.
Based in Vancouver, 64 km away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Deck builder”.
Based in Victoria, 43 km away
Ranked #21 because of its Google rating and review volume: 3.4★ from 10 Google reviews.
20 more foundation repair companies within 64 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Boreas Enterprises | 5.0★ (2) | In Duncan |
| Coastline Concrete | 5.0★ (54) | In Duncan |
| Cowichan Wastewater Plus Inc. | 5.0★ (4) | In Duncan |
| Flatwork Concrete Construction | 5.0★ (3) | In Duncan |
| Fornelli Deck & Awning Ltd | 45 km | |
| Green Isle Homes & Timberworks | 5.0★ (2) | In Duncan |
| HazForce Environmental Ltd | 4.8★ (51) | In Duncan |
| High Definition Roofing Ltd. Duncan | 4.9★ (56) | In Duncan |
| Island Basement Systems | In Duncan | |
| K & S Cleaning Systems & Roof Demossing/Treatments | 5.0★ (2) | In Duncan |
| MGY Construction | In Duncan | |
| Neway Drainage Ltd. | 5.0★ (1) | 64 km |
| Optimus Electric, Inc | In Duncan | |
| Quik Lay Concrete Finishing | In Duncan | |
| Raintek Exterior Waterproofing | 40 km | |
| Richard’s Island Perimeter Drains | 4.1★ (28) | In Duncan |
| Trafalgar Homes | 4.5★ (20) | In Duncan |
| Victoria Waterproofing | 5.0★ (1) | 47 km |
| VIP Property Restorations Ltd. | 4.7★ (12) | In Duncan |
| Vortech Plumbing & Drainage Inc | 4.6★ (115) | In Duncan |
US national ranges converted to CAD, not adjusted for Duncan. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Foundation repair | CA$3,130 | CA$7,270 | CA$11,430 | Per project: typical range of customer-reported repairs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 21 Duncan foundation repair companies on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Duncan data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |