Custom Home Guide · Chapter 2 of 6

    Design & Drawings

    What you pay for in design isn't lines on paper — it's decisions you won't have to remake on site at five times the cost.

    Architect vs. builder drawings

    A licensed architect is required in BC for some scopes and optional for most single-family work. Architect-led drawing sets are typically more rigorous on form, light and structural concept; builder-led sets (with a designer and coordinating engineers) are usually more buildable and faster to permit. Neither is universally correct — the question is which the lot, the program and the municipality reward.

    The Architectural Institute of BC publishes the scope-of-practice rules. Read them before assuming you do or don't need an architect.

    Permit-ready isn't the same as construction-ready

    A drawing set that passes permit review still has to be developed into a working construction set — shop drawings, full envelope details, mechanical coordination, structural connections. If your design contract ends at permit, you'll be paying twice for the gap. Pre-construction services agreements exist to bridge it properly.

    Decision-stacking is the silent budget killer

    Most cost overruns aren't caused by one big change — they're the cumulative weight of fifty deferred decisions. Bringing material, mechanical and finishing questions forward into the design phase, when changes cost a redline instead of a re-pour, is the single biggest predictor of a build that lands on time.

    When this chapter applies

    A quick framing of when the advice above is the right advice — and when it isn't.

    Best for

    • Owners committing to a fully custom program who want one source of truth.
    • Hillside, heritage or unusual lots that warrant architect involvement.
    • Anyone whose builder is in conversation before drawings are finalised.

    Fails when

    • Drawings are commissioned in isolation and handed to a builder afterward.
    • Design firm is not coordinating with the structural and mechanical engineers.
    • Owner keeps making finish-level decisions after the permit is submitted.

    Verify before acting

    • Confirm the design contract covers post-permit construction documents.
    • Confirm AIBC registration and current licence for any named architect.
    • Confirm coordinating engineer scope (structural, mechanical, envelope).

    Go deeper in the Journal

    Detail-level posts that expand on specific topics from this chapter.

    Official sources

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    If you're partway through this guide and the questions are getting specific, that's the right moment to bring us in. Planning calls are free.