Serving Ajax & South Durham

Bathroom Renovations
Ajax

From the established homes near the lakeshore to the newer subdivisions north of the 401, Cornerstone builds waterproof, built-to-last bathrooms in Ajax — fixed price, daily cleanup, and a 5-year written warranty.

Start Your Bathroom Diagnostic Call 1-888-404-7383

Local Knowledge

Bathroom Renovations Built for Ajax Homes

Ajax grew quickly, and most of its housing reflects that — large subdivisions built from the late 1990s through the 2010s spreading north of the 401. These homes are structurally sound but the bathrooms were finished to a builder's price point: basic tile, entry-level fixtures, and standard vanities. They're ideal candidates for an upgrade that adds comfort and value without touching the structure.

Closer to the lakeshore and the older south Ajax neighbourhoods, you'll find more established homes — and bathrooms that sometimes need plumbing updates or a smarter layout when they're opened up. Knowing which situation you're dealing with before demo is what keeps the project on budget.

Whichever Ajax home you've got, the engineering underneath is what protects it — and that never changes with budget. Every bathroom we build gets the same Schluter waterproofing system and a mandatory 24-hour flood test before a single tile goes in.

Plenty of Ajax projects don't stop at the bathroom. If you're already opening up the home, it's the right time to fold in a kitchen renovation in Ajax while the trades are on site — and if you're finishing the lower level, a legal basement apartment in Ajax needs its own fully waterproofed bathroom built to this exact standard.

Recent Work

Bathrooms We've Built Around Durham

Bathroom renovation Durham Region Cornerstone Construction Custom tiled shower Durham Region bathroom renovation Finished Durham Region bathroom renovation Cornerstone

A recent Cornerstone bathroom built here in Durham Region — Schluter waterproofing, 24-hour flood test, and a 5-year written warranty. The same standard goes into every Ajax project.

The Cornerstone Standard

The Same Build Quality at Every Budget

Whether your Ajax bathroom is a focused refresh or a full ensuite, the structural standard never changes. Here's what goes into every one.

Waterproof Fortress

Schluter-KERDI-BOARD in all wet zones and Schluter-DITRA under every tile floor — water physically cannot reach your wall cavities or crack your tile.

24-Hour Flood Test

Every shower basin is flooded to the brim and held for 24 hours before any tile goes in. If the water drops a millimetre, work stops.

Fixed Price & On-Time

A detailed multi-page proposal with a locked price and a committed schedule — backed by a $300/day penalty if we miss the end date.

Dust & Site Protection

Sealed dust containment, HEPA air scrubbers, floor armour, and a 30-minute cleanup every single day. Your home stays livable.

Common Questions

Ajax Bathroom Renovation FAQ

I have a builder-grade bathroom in an Ajax subdivision — is it worth upgrading?
Definitely — these are some of our most popular and efficient projects. The bones are sound, so the work goes into what you see and use every day: better tile, a properly waterproofed shower, upgraded fixtures, a new vanity, and lighting. You get a dramatic transformation and real added value without major structural cost.
How long does a bathroom renovation take?
Most bathroom renovations run 2 to 4 weeks depending on scope — a focused refresh is 1 to 2 weeks, a full ensuite gut with custom tile and Schluter waterproofing runs 3 to 5 weeks. Before any work begins you get a written schedule with a committed start and end date, backed by a $300 per day penalty if we miss it.
What does a bathroom renovation cost in Ajax?
A focused refresh runs $12,000–$25,000, a full renovation $20,000–$40,000, and a high-end ensuite build $25,000–$80,000+. Your investment depends on the size of the space, your fixtures, the tile scope, and whether we're moving plumbing or electrical. You get a fixed price in writing before any work starts.
Do you pull permits?
Yes. Any work involving plumbing, electrical, or structural changes requires a permit in Ontario, and we pull and manage all permits with the Town of Ajax so the work is inspected and done to code. Contractors who skip permits create a liability that sits on your property title and can void your home insurance.
Can you reconfigure the layout, not just refinish it?
Yes. Many Ajax subdivision bathrooms have a standard builder layout that doesn't make the best use of the space. We can move plumbing and reconfigure — turning a tub-shower combo into a proper walk-in shower, adding a double vanity, or reworking the layout for better flow. We map it all out in the proposal with a fixed price before we start.
The Full Bathroom Build Standard
See exactly how we engineer every bathroom — waterproofing, process, and investment guide
See How We Build

Ready to Renovate Your Ajax Bathroom?

Start with a free bathroom diagnostic. We'll walk your space, assess the scope, and deliver a detailed multi-page proposal with a fixed price before any work begins — built once, built right.

Start Your Bathroom Diagnostic Call 1-888-404-7383

Durham Region's trusted renovation contractor. Led by Mike Brock since 2017. We Listen, We Build, We Deliver.

Service Areas

  • Oshawa, ON
  • Whitby, ON
  • Bowmanville, ON
  • Clarington, ON
  • Ajax, ON
  • Pickering, ON
  • Newcastle, ON
  • Scarborough, ON
  • Whitchurch-Stouffville, ON
  • Port Perry, ON
  • Peterborough, ON
  • Port Hope, ON
  • Cobourg, ON
  • Northumberland County, ON
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