Apron-front sinks, often called farmhouse sinks, are sized differently from every other sink in the kitchen aisle. The exposed front panel, the deeper bowl and the modified cabinet they sit in all mean the width printed on the box is only the beginning of the fit story. Whether you are renovating a century home in Halifax, updating a bungalow on the Prairies or building outside Vancouver, sorting out the dimensions before you order is the difference between a smooth install and a very heavy return shipment.
This guide covers the standard size ranges you will actually find in Canada, how to measure your space properly, the clearances that matter and the spec-sheet lines worth reading twice.
Standard apron-front sink sizes
Most apron-front sinks sold in Canada cluster into a handful of widths. Manufacturers such as Shaws, Blanco, Bosco and Zomodo publish dimensions in both inches and millimetres, and every model varies a little, so treat the ranges below as orientation rather than gospel.
| Dimension | Typical range | Notes |
|---|---|---|
| Overall width | 24 to 36 inches (about 610 to 915 mm) | 30 and 33 inch models are the most common; 24 to 27 inch sinks suit condos and compact kitchens |
| Front to back | 18 to 22 inches (about 457 to 560 mm) | Must work with your countertop depth and overhang |
| Bowl depth | 8 to 10 inches (about 203 to 254 mm) | Deeper than most drop-in sinks, which affects drain height below |
| Apron height | Roughly 7 to 10 inches | The exposed front panel; varies widely by design |
Single-bowl layouts dominate at 30 inches and under. From 33 inches up, you will also find double-bowl, low-divide and workstation-style models with an integrated ledge for cutting boards. If that last format appeals, our workstation sinks collection shows what it looks like in practice.
Measure the cabinet, not the countertop
The measurement that decides everything is the interior width of your sink base cabinet. As a widely used rule of thumb, an apron-front sink needs a cabinet about 3 inches wider than the sink itself, so a 33 inch sink typically calls for a 36 inch base. The exact requirement is printed on the spec sheet as a minimum cabinet size, and it varies with material because fireclay walls are thicker than stainless steel.
- Interior width: measure between the inside faces of the cabinet side panels, not across the front frame.
- Front to back: measure the interior depth and note where the water supply and drain rough-in sit on the back wall.
- Countertop depth: confirm the counter overhang at the front, since the apron projects proud of the cabinet face on many designs.
- Height below: a deeper bowl pushes the drain connection lower, so check what room is left for the trap and any dishwasher tie-in.
Clearance rules worth knowing
These are general planning guidelines, not code citations. The National Plumbing Code of Canada sets the framework, but the enforceable details come from provincial and municipal amendments, so confirm anything drain-related with a licensed plumber in your province.
- Behind the sink: leave enough deck space for the faucet base and a full handle swing. If a window sits above the sink, check the sill height against the faucet's overall height; the tall pull-down models in our kitchen faucets collection list that figure on their own spec sheets.
- Below the sink: the deeper bowl lowers the drain outlet. In a retrofit, compare the sink's drain height against your existing rough-in before you order.
- Beside the sink: keep the dishwasher within easy reach, but confirm its open door clears the apron in corner layouts.
- Under the sink: fireclay and cast iron are genuinely heavy, especially filled with water and dishes. These materials need a reinforced support frame inside the cabinet, which the installation sheet will describe.
Common fit mistakes
- Ordering by cabinet width. A 36 inch cabinet does not take a 36 inch sink. It takes the sink whose minimum cabinet size is 36 inches, which is usually a 33 inch model.
- Ignoring apron height. A tall apron can collide with the top drawer bank or leave an awkward reveal above the doors. Sketch the front elevation before you commit.
- Leaving the reveal decision to the last minute. Your countertop fabricator needs to know whether the counter will sit flush with, slightly over or slightly behind the bowl edge, and they should template from the actual sink, not the brochure.
- Skipping the weight question. Granite composite and stainless models are far lighter than fireclay, which changes what your cabinet has to carry.
- Assuming a retrofit is plug and play. Standard cabinets almost always need the front rail cut down and a support frame added. Budget for the carpentry, not just the sink.
- Missing the drain location. Centre drains and offset rear drains route plumbing differently and change how much storage survives below.
How to read the spec sheet
Every reputable manufacturer publishes a dimensioned drawing, and it answers most fit questions on one page. Look for these lines:
- Overall exterior dimensions versus interior bowl dimensions, since wall thickness eats usable space
- Minimum base cabinet size, the number that overrides every rule of thumb
- Apron height, and whether the apron is reversible with a different profile on each face
- Drain size and placement, and whether a garburator is supported
- Corner radius, which affects both cleaning and how stock pots sit in the bowl
- Installation style, since some apron-front models undermount to the counter while others rest fully on the support frame
The sink itself carries few regulatory marks, but the drains, strainers and faucets you pair with it should carry cUPC or CSA certification, which inspectors across Canada expect to see. Matching flanges and baskets live in our sink drains collection.
A note on shipping and cold weather
Heavy fireclay and cast iron sinks usually travel by freight rather than parcel, and they ship this way right across the country, from Vancouver Island to St. John's. Carriers expect visible damage to be noted on the delivery receipt, so inspect the crate before signing. In winter, let a cold-delivered ceramic sink come up to room temperature before running hot water into it. When you are ready to compare dimensions side by side, browse our apron-front sinks collection, and find more planning help in our kitchen and bath guides.
Frequently asked questions
What size cabinet does a 33 inch apron-front sink need?
Typically a 36 inch base cabinet, following the general rule that the cabinet runs about 3 inches wider than the sink. Confirm against the minimum cabinet size on the exact model's spec sheet, because wall thickness differs between fireclay, stainless steel and composite.
Are apron-front sinks deeper than regular kitchen sinks?
Usually, yes. Bowls in the 9 to 10 inch range are common, which is part of the appeal for washing stock pots and roasting pans. The trade-off is a lower drain outlet, so retrofit installations should compare drain height against the existing rough-in before ordering.
Can I install an apron-front sink in my existing cabinets?
Often, but plan on modifications. The cabinet front rail generally needs to be cut down to accept the apron, and heavier materials need a support frame built inside the cabinet. A carpenter or experienced installer can usually adapt a standard base, but it is not a same-day swap.
Do spec sheets in Canada use inches or millimetres?
Both, in most cases. Sinks are marketed by nominal inch widths, while the dimensioned drawings usually carry millimetres as well. If your cabinetmaker or fabricator works in metric, use the millimetre figures from the drawing rather than converting the rounded inch value yourself.
