Crawl Space to Full Basement Conversions in the Niagara Region
A crawl space is wasted square footage under your house. Theriault Forming Construction Ltd. turns crawl spaces into full-height basements: we excavate, underpin the foundation to the new depth, pour a new floor, and waterproof it so the space stays dry. It is one of the more complex jobs we do, and one of the most satisfying for the homeowner.
What a conversion involves
Assessment of the existing foundation, soil and drainage
Excavation of the crawl space to the new depth
Underpinning the foundation in sections so the house stays supported
New footings, weeping tile and a poured concrete floor
Waterproofing so the finished basement stays dry
Why Theriault
We do every stage ourselves: excavating, forming, pouring and waterproofing. That means one estimate, one crew and one person responsible for the result. Over 40 years in business, family owned in Smithville, never a single complaint.
ABOUT
About Theriault Forming Construction Ltd.
Founded in the 1980s by Bob Theriault with one simple rule: do it right the first time. Over 40 years later the company is still family owned, still based in Smithville, and has never received a single complaint. From a straightforward concrete patio to a complex crawl space conversion or foundation underpinning, Bob and his team take on the job and finish it to the highest standard.
Where we work
We convert crawl spaces for homeowners in Smithville, Grimsby, Beamsville, Vineland, Stoney Creek, Hamilton, St. Catharines, Thorold, Pelham, Fonthill, Welland, Niagara Falls and Niagara-on-the-Lake. If your town is close to one of these, call 905-957-4406 and ask.
Frequently asked questions
Is it cheaper to convert a crawl space or build an addition? It depends on the house, but a conversion uses the footprint you already have and does not change the exterior. Bob can give you a free estimate so you can compare.
Will the finished basement be dry? Yes. Waterproofing and drainage are part of the job, not an add-on.
Do you handle permits? Ask us during the estimate. We will walk you through what your municipality requires.