My house is from the 1950s. Does it have a perimeter drain?

The year cannot answer it. Houses of the same age on the same street differ, because the requirement has always turned on the site rather than the date. What settles it is looking — for a discharge point, for cleanouts, or in an open trench.

If there is no pipe, is my house not up to code?

Not necessarily. The Code accepts a layer of clean crushed rock as drainage in its own right, and exempts the requirement altogether where drainage can be shown to be unnecessary. A house with no pipe may be exactly what was approved.

A contractor says my drains have failed. Can they know that without looking?

They can suspect it from symptoms. They cannot know it, and on a house that may have no pipe at all they cannot even assume the system exists. Ask what they have seen and how.

We found clay tile. Does that have to be replaced?

Not because it is clay. Clay drain tile and vitrified clay pipe are both on the Code's accepted materials list today. Clay fails for ordinary reasons — roots, settlement, silt — and those are things a camera can show.

People keep telling me to get my perimeter drain scoped. How do I know my house even has one?

Does every house have a perimeter drain?

Direct answer · reviewed 2026-10-13

No, and the reason is more interesting than age. The Building Code has never required a pipe — it requires drainage, and it names a layer of clean crushed rock as an accepted way to provide it. So a house can be entirely compliant with no perimeter drain pipe anywhere around it. On top of that, the requirement itself carries an exemption: it applies unless drainage can be shown to be unnecessary, which on a sand or gravel site is a real finding rather than a loophole. Between those two sentences there are houses in Greater Victoria with a pipe, houses with a granular layer and no pipe, and houses with neither, all of them legal. Which yours is decides whether “scope the drain” is even a sentence that applies to you.

Conditions and exceptions

This is about what is required, not about what is there. Fifty-year-old work is not always what the drawings said.
A contractor quoting a replacement should be able to tell you what exists now and how they know. If the answer is vague, that is a scope question before it is a price question.
Nothing here says a house without a pipe is fine. It says a house without a pipe is not automatically defective.

Drain problem assessment Scope, clean, repair or replace

Local evidence

Every figure below is quoted from the source shown or is our labelled estimate. Verified dates are the day we last checked the source; a figure whose check is overdue is withheld rather than shown.

Does a house have to have a foundation drain?: Yes — unless it can be shown to be unnecessary, the bottom of every exterior foundation wall must be drained, either by drainage tile or pipe around the outside of the foundation or by a layer of clean crushed rock; Applies to new construction and to work that replaces the drainage · A granular drainage layer is an accepted alternative to pipe; Province of British Columbia (BC Codes) · quoted · verified 2026-09-22
What the Code requires about water getting into a crawl space: Except where it can be shown to be unnecessary, the ingress of water into a crawl space shall be controlled by grading or drainage; Grading is listed first and is the cheaper of the two · The same 'unless shown to be unnecessary' wording appears in the foundation drainage requirement; Province of British Columbia (BC Codes) · quoted · verified 2026-09-22
Pipe materials the Code accepts for foundation drainage: Clay drain tile (ASTM C 4), concrete drain tile (ASTM C 412M), perforated concrete pipe (ASTM C 444M), vitrified clay pipe (ASTM C 700), polyethylene flexible drainage pipe (BNQ 3624-115), plastic drain and sewer pipe (CAN/CSA-B182.1) or corrugated steel pipe (CSA G401); Province of British Columbia (BC Codes) · quoted · verified 2026-09-22
Where a foundation drain is allowed to discharge: To a sewer, a drainage ditch or a dry well; A dry well may be used only where the natural groundwater level is below the bottom of the dry well, and must be at least 5 m from the foundation (Sentences 9.14.5.3.(1) and (2)); Province of British Columbia (BC Codes) · quoted · verified 2026-09-22

The Code asks for drainage, and a pipe is one way to give it

Read the requirement as written: Yes — unless it can be shown to be unnecessary, the bottom of every exterior foundation wall must be drained, either by drainage tile or pipe around the outside of the foundation or by a layer of clean crushed rock

Two things in that sentence do work. The first is the word or — drainage tile or pipe around the outside of the foundation, or a layer of clean crushed rock. The second is the opening clause: unless it can be shown to be unnecessary. Neither is an obscure exception; both are in the sentence that creates the obligation.

This is why a builder on a free-draining gravel site can put a granular layer against the footing and be finished, and why a homeowner looking for a cleanout on such a house will never find one. There is nothing to find.

Under a crawl space, grading is named first

A large share of older Greater Victoria houses sit on crawl spaces rather than basements, and the Code treats them with the same latitude. Except where it can be shown to be unnecessary, the ingress of water into a crawl space shall be controlled by grading or drainage

Grading or drainage — and grading comes first in the sentence, which is also the order of cost. A house whose ground falls away on every side may genuinely never have needed a pipe.

Where a crawl space does have drainage, it is not a lesser system: the Code sends it back to the same section as a basement house, so the pipe size, the depth, the stone cover and the discharge rules are identical.

How to tell what you actually have

Start at the end of the pipe rather than the beginning, because the discharge is above ground and the rest is not. To a sewer, a drainage ditch or a dry well So look for where water leaves: a connection at the property line, an outfall into a ditch, or a dry well set back from the house. No outfall anywhere is a signal.

Then look for cleanouts — capped vertical pipes at the corners of the house, usually 100 mm, often buried under a few centimetres of soil or hidden in a shrub. Plenty of real installations have none, so finding nothing proves less than finding something.

If a trench is ever open, what comes out of it dates the house more honestly than any document, and it is worth knowing that old material is not automatically wrong material: Clay drain tile (ASTM C 4), concrete drain tile (ASTM C 412M), perforated concrete pipe (ASTM C 444M), vitrified clay pipe (ASTM C 700), polyethylene flexible drainage pipe (BNQ 3624-115), plastic drain and sewer pipe (CAN/CSA-B182.1) or corrugated steel pipe (CSA G401) Clay tile is still on the Code's own accepted list. Finding it tells you the era, not that somebody cheated.

Why this is worth settling before a quote, not after

The honest version of a drainage quote starts with what is there. A price to replace a perimeter drain on a house that turns out to have a granular layer and no pipe is not a replacement, it is an installation — a different job, a different scope, and a different number.

It also changes what a camera can do for you. Scoping is how you see inside a pipe; it cannot tell you anything about crushed rock. On a house where nobody has established that a pipe exists, booking a scope can mean paying someone to discover there is nothing to look down.

So the first question is not what is wrong with my drain. It is whether this house has one, and the person quoting the work should be able to answer that before they price it.

Questions homeowners ask

My house is from the 1950s. Does it have a perimeter drain?: The year cannot answer it. Houses of the same age on the same street differ, because the requirement has always turned on the site rather than the date. What settles it is looking — for a discharge point, for cleanouts, or in an open trench.
If there is no pipe, is my house not up to code?: Not necessarily. The Code accepts a layer of clean crushed rock as drainage in its own right, and exempts the requirement altogether where drainage can be shown to be unnecessary. A house with no pipe may be exactly what was approved.
A contractor says my drains have failed. Can they know that without looking?: They can suspect it from symptoms. They cannot know it, and on a house that may have no pipe at all they cannot even assume the system exists. Ask what they have seen and how.
We found clay tile. Does that have to be replaced?: Not because it is clay. Clay drain tile and vitrified clay pipe are both on the Code's accepted materials list today. Clay fails for ordinary reasons — roots, settlement, silt — and those are things a camera can show.

Your next step

Whether this house has a pipe at all changes which of the usual answers can apply to it.

Work out what is probably going on

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Sources

British Columbia Building Code 2018, Division B, Section 9.14 — Drainage — Province of British Columbia (BC Codes), accessed 2026-09-22
British Columbia Building Code 2018, Division B, Section 9.18 — Crawl Spaces — Province of British Columbia (BC Codes), accessed 2026-09-22

Code and municipal requirements are quoted from the sources above; price ranges are what named local companies publish, and the companies that publish them sell the work. Nothing here is a diagnosis of a particular house: only a camera in your own drain can tell you what is wrong with it. Report a correction.