The ensuite is the one bathroom you use every single day, twice a day, usually half-awake. When it works, mornings run smoother; when it doesn’t, you notice every day. It is also the bathroom where renovation budgets climb the fastest, because it tends to carry the most wish-list items: a double vanity, a glass shower, a freestanding tub, heated floors.
Here is what a primary ensuite renovation actually costs in Oakville in 2026, what pushes the number up or down, and how to plan it properly.
The short answer
Ensuite renovations follow the same three tiers as any bathroom in Oakville, but most primary ensuites land in the upper two:
- A refresh — $12,000 to $18,000. New vanity, toilet, lighting, flooring and paint, with the layout and plumbing staying exactly where they are. Realistic for an ensuite only if you are happy with the current footprint.
- A mid-range remodel — $18,000 to $28,000. New tile, a tub-to-shower conversion, better fixtures, frameless glass, minor layout changes. This is where many ensuite projects start.
- A full or custom ensuite — $30,000 to $60,000 or more. Relocated plumbing, custom tile and glass, heated floors, premium fixtures — a primary ensuite done properly.
As a rule of thumb, finished bathroom work in Oakville runs roughly $160 to $280 per square foot. Because ensuites are often larger than a hall bathroom — and because the finish level is usually higher — the total lands higher even at the same rate. Our full Oakville bathroom renovation cost guide breaks the tiers down line by line.
Why ensuites cost more than hall bathrooms
Two of everything. A double vanity means two sinks, two faucets, two drain runs and a longer countertop. It is the single most requested ensuite feature, and it multiplies the fixture budget.
A tub and a shower, not a tub-shower. Most primary ensuites separate the freestanding tub from a glass shower. That is two waterproofed zones instead of one — for a standard shower alone, budget roughly $1,500 to $3,500 for waterproofing done right.
Layout changes. Ensuites in older Oakville homes were often built small, so the renovation frequently borrows space from a closet or the bedroom. The moment plumbing moves, you are in the full-renovation tier — and usually into permit territory.
Comfort upgrades. Heated floors, a towel warmer, backlit mirrors and built-in niches are small line items individually; together they add real money. They are also the things clients tell us they would never give up afterward.
You can see all of this in one place in our Gregwood ensuite project — twin floating vanities, a freestanding tub, a glass shower and a geometric tile floor, carved out of a dated primary bathroom.
Do you need a permit?
It depends on scope, and the line is plumbing. A like-for-like refresh with every fixture staying put usually does not need a building permit; moving plumbing or relocating fixtures generally does — and most full ensuite renovations change something. The Town of Oakville’s Building Services department confirms what applies to your specific project, and we prepare and submit the drawings as part of our design work. Our Oakville renovation permit guide walks through the whole process.
How long does it take?
Design and drawings usually take four to six weeks, and construction on a single room runs about eight weeks once it starts. Add permit review time when plumbing moves. The honest planning window from first conversation to finished ensuite is three to six months — our guide on how long a renovation takes explains where the time actually goes.
How to keep the budget honest
The expensive ensuite mistakes happen before demolition, not after: a tub ordered before the drain location was confirmed, tile chosen after the waterproofing was quoted, a vanity that arrives two inches too wide. That is why we finalize every finish, fixture and dimension on paper before construction starts — you know the real number before anyone swings a hammer. It is also what a design fee actually buys; our interior design fee guide covers how that works.
If you are planning an ensuite in Oakville, our bathroom design in Oakville page shows how we approach these projects end to end.
Frequently asked questions
How much does an ensuite renovation cost in Oakville?
A refresh with the same layout runs $12,000 to $18,000, a mid-range remodel $18,000 to $28,000, and a full custom ensuite with relocated plumbing and premium finishes $30,000 to $60,000 or more. Most primary ensuites land in the upper two tiers.
Do I need a permit to renovate my ensuite?
A like-for-like refresh usually does not need one; moving plumbing or relocating fixtures generally does. The Town of Oakville’s Building Services department confirms what applies to your project.
How long does an ensuite renovation take?
Design and drawings take four to six weeks and construction about eight weeks, plus permit review when plumbing moves. Plan for three to six months from first conversation to finished room.
What adds the most cost to an ensuite?
Moving plumbing, separating the tub from the shower, and doubling the vanity. Each one adds trades, waterproofing and fixtures — they are also the changes that make an ensuite work for two people.
Ready to start? Contact us — we will give you a real number for your ensuite before construction begins.