- Source reference
- 5706-4131-01
- Licence class
- Entrepreneur
- First issued
- 2015
- Valid through
- Jul 2027
- Source checked
- Jul 28, 2026
Public evidence profile
Devaille & Si Inc
Credentials & registries
Régie du bâtiment du Québec
Trust Score
32out of 100
32 out of 100, with a caution: newest review we found is from July 2020. Weigh that age against the score.
- Rated 5.0 from 2 reviews
- 1 credential shown
Newest review July 2020
How this score is worked out
Rating5.0 / 5
Review volumeLow · 2
Independent sources1 independent public source
Credentials1 credential shown
How this score is made up
What customers say19.7 of 64.1
Independent checks10.6 of 21.9
Track record1.3 of 14.1
See the independent checks
- Ways to reach them10.6 of 12.5
- Photos of their work0 of 6.3
- Industry recognition0 of 3.1
Missing evidence lowers the score because we can't check it. It doesn't mean it doesn't exist. Claiming a profile never changes the score. Evidence context, not a guarantee of workmanship.
Credentials and associations
1Credentials and memberships
These credentials and memberships are attributed to named public sources. Check the source before relying on them.
Reviews · public evidence
What customers say
These reviews are published independently on the named public source below, not testimonials this business chose to show. We bring them together and link each one back to where it appeared, so you can open the source and read it yourself.
5.0out of 5
Where these reviews are published
- Soumission Rénovation2 reviews · 5.0 avg
Detailed reviews
Excellent service, les gars sont consciencieux et très professionnels. Nous sommes plus que satisfaits du résultat des travaux d'agrandissement qu'ils ont fait sur notre maison. Nous les recommandons sans aucune hésitation à tout ceux qui ont des projets, grands ou petits.
Bonne présentation, le devis était bien fait et lisible, démontre avoir de l'expérience
Local context
Rated 5.0, above the local average for basement conversion specialists in Saguenay
Across 9 basement conversion specialists in Saguenay, the typical rating is 4.8 out of 5. We compare against the same businesses a homeowner would find searching for this trade locally.
Sources
2 named public sourcesWhere this information comes from
Everything on this page is drawn from named public sources. Where a source provides a public link, you can open the original and dig deeper.
Review sources
Registers and membership directories
Check dates vary by source. Where we hold a date, the check shows it.
Services they list
Adaptation DomiciliaireAgrandissement de maisonAgrandissement de maison - Avec PlanAménagement Paysager - PergolaAuventBalcon (Fibre + Béton) & Ame. paysagerBalcon & Patio Multi-MatériauxBalcons - BoisCarrelageCharpenteCréation ouverture portes/fenêtres (fondation)Entrée d'eau (avec excavation)
Listed on public sources or the business's own website; check directly that they cover your job before you book.
Your own checks
What to check before you hire
Worth checking yourself
Only a few public reviews are shown. Ask for recent references you can contact.
Their public evidence comes from a single source. Look them up on another site before deciding.
Trade licensing in Canada is set by each province or territory. Electrical, gas and plumbing are licensed trades almost everywhere (for example ESA for electrical and TSSA for gas in Ontario), so check your provincial regulator that the contractor is certified for the work before you hire.
A construction lien is a real risk: in every province an unpaid subcontractor or supplier can register a lien against your home even if you already paid the main contractor. Hold back the statutory amount (commonly around 10%) and get signed lien waivers as you pay.
Ask to see a portfolio of completed work like yours, plus recent references you can contact.
Want an extra legitimacy check? Run the Rogue Contractor Check on Devaille & Si Inc before you contact them.
Run Rogue Contractor Check →Good to know
Common questions about Devaille & Si Inc
Is Devaille & Si Inc a legitimate business?
Devaille & Si Inc has 2 independent public reviews, rated 5 out of 5. This is independent public evidence gathered from named public sources (no ads, no paid placement), not a guarantee of workmanship. If anything here is out of date, the business can request a correction.
What do customers say about Devaille & Si Inc?
Devaille & Si Inc has 2 public reviews, averaging 5 out of 5. You can read the individual reviews and where each came from in the reviews section above.
How do I know Devaille & Si Inc's reviews are genuine?
Devaille & Si Inc's 2 public reviews come from a named public review source, and MyTrustedTraders links every one back to where it was published, so you can open the source and read them yourself rather than trusting a single curated page. MyTrustedTraders brings this public evidence together with no ads and no paid placement: we show where every review came from rather than selling rankings, so you can weigh the evidence for yourself.
Is Devaille & Si Inc qualified and accredited?
We hold 1 independently sourced credential for Devaille & Si Inc, including Régie du bâtiment du Québec. Each is attributed to the body that issued it in the credentials section. For example, Régie du bâtiment du Québec is the Régie du bâtiment du Québec: the provincial authority you must hold a licence from to run a construction business in Quebec.
What does Devaille & Si Inc specialise in?
Devaille & Si Inc lists specialist services including Adaptation Domiciliaire, Agrandissement de maison, Agrandissement de maison - Avec Plan, Aménagement Paysager - Pergola, Auvent, Balcon (Fibre + Béton) & Ame. paysager. If your job is one of these, look for it in their listed services or ask them to confirm for your project.