Railings in Vancouver
Railings are one of the few things in a house whose dimensions are prescribed by code rather than taste. Those rules exist because a guard that fails does so at exactly the moment somebody is leaning on it.
Code height requirements
The BC Building Code sets minimum guard heights, and the required height differs between interior stairs and exterior guards, and increases where the drop below is greater. A guard that was compliant when built may not meet current requirements if the deck or landing has since been altered.
We do not publish guard height figures on this page, and you should be wary of any contractor who quotes them to you from memory. The required minimum differs between an interior stair, an exterior guard and a balcony, and it increases with the drop below — so the only number that matters is the one applying to your situation. We confirm it against the current BC Building Code for your job and tell you what it is before building anything.
The 100mm sphere spacing rule
Openings in a guard are limited so that a small sphere cannot pass through — the rule exists specifically to stop a young child getting through or becoming trapped. It applies to the gaps between balusters and also to the gap at the bottom.
It is the requirement most often missed in decorative and horizontal-cable designs, and it is worth checking on any existing railing in a home where small children live. We verify the exact dimension against current code for your railing rather than working from the figure everyone half-remembers.
Guard load requirements
A guard has to resist a specified lateral force — it must hold when somebody falls against it or a crowd leans on it, not merely stay upright under its own weight. That load is carried by the posts and, critically, by how the posts attach to the structure.
This is where most failures originate. The railing itself is rarely the weak point; the connection between post and framing is, particularly where it has been fixed only through decking rather than into a rim joist or blocking.
When a permit is needed
Like-for-like replacement of an existing compliant guard is generally treated as maintenance. Building a new deck, altering its height or structure, or changing a guard configuration may require a permit, and requirements vary between municipalities.
We check the requirement for your address before starting. Where a permit applies, an inspected railing is also documented, which matters when you sell.
What this costs
$3,200–$16,000 installed
Painted steel and wood sit at the bottom, frameless glass at the top. All work is built to current BC Building Code guard requirements, confirmed for your specific drop height.
Materials are always separate from labour and passed on at cost. Quotes are free and written, and the full rate card is published rather than given out on request.
Common questions
How high does a railing have to be in BC?
The code sets minimums that differ between interior stairs and exterior guards, and they increase with the drop below. We deliberately do not publish the figures here, because the one applying to your railing depends on which of those conditions it is in — we confirm it against current code for your specific situation and tell you before we build.
What is the 4-inch sphere rule?
Gaps in a guard must be small enough that a specified sphere cannot pass through, to prevent a small child getting through or becoming trapped. It applies between balusters and at the bottom gap, and we confirm the exact dimension against current code rather than relying on the popular name for the rule.
Does replacing a railing need a permit?
Like-for-like replacement of a compliant guard is usually maintenance. New decks, height or structural changes, or a different guard configuration may require one — and it varies by municipality, so we check for your address.