The short answer
Most unenclosed pergolas need no council approval at all in NSW: attached to the house, up to 25m², behind the building line, within the height rules and clear of boundary setbacks = exempt development under the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 — the same rulebook that covers balconies, decks, patios, terraces and verandahs as one family. Outside those limits = CDC(private certifier, weeks). Constrained land = DA (council, months).
| Your pergola | Path | Approval cost & time |
|---|---|---|
| ≤25m², unenclosed, attached, behind the building line, setbacks met | Exempt — no approval | Nothing to pay in approvals — build when ready |
| Larger, freestanding, or otherwise outside the limits, standard block | CDC via private certifier | A private certifier's fee and drawings, typically a few weeks |
| Heritage conservation / bushfire complications / foreshore | DA via council | Council application fees, and months rather than weeks |
The honest fine print: exempt development is a conjunction of conditions, not a vibe. The area cap sits alongside height limits, setbacks (commonly 900mm from side and rear boundaries), a floor no more than 1m above ground where the pergola sits over a deck, lawful stormwater disposal, and lot-size caveats — smaller lots carry tighter totals, and the combined area of existing sheds, decks and patio covers can count against you. Miss one condition and the structure isn't exempt; it simply routes to a CDC, which is a detour of weeks, not a refusal. And heritage conservation areas — mapped street by street across parts of Willoughby, Mosman and North Sydney — change the answer before design even starts.
We give every pergola quote its approval answer in writing — exempt, CDC or DA — before you commit. See our pergolas and patios service or ask below with a photo of the space.
Open pergola vs roofed patio cover
The words blur around Sydney, but the SEPP cares about two things: whether the structure isunenclosed, and what sits on top. An open-battened pergola and a solid-roofed patio cover can both be exempt within the same limits — the roof doesn't disqualify you. It does add considerations:
| Consideration | Open pergola | Roofed patio cover |
|---|---|---|
| Exempt pathway available | Yes, within the limits | Yes, within the same limits |
| Height measured to | Top of the frame | Top of the roofline — solid roofs sit higher sooner |
| Bushfire-prone land | Fewer material constraints | Higher BAL ratings expect non-combustible roofing |
| Where it meets the house | Fixing detail only | Flashing and drainage become critical — and must be lawful |
| What ends the exemption | Enclosing the sides | Enclosing the sides — walls make it a room, not a pergola |
The pattern to hold onto: roof on, walls off. The moment battens become a sealed roofand the sides start filling in with screens, blinds tracked into channels, or glass, you're drifting out of the pergola family and into enclosed-structure territory, where the exempt provisions no longer apply. Plenty of backyard disputes start exactly there — a compliant patio cover that grew walls one winter at a time.
Attached vs freestanding
Attached to the dwelling is the standard exempt configuration — the SEPP's provisions for this family assume the structure hangs off the house, behind the building line. A freestanding pergola down the garden is a different conversation: it falls outside those provisions and usually needs its own assessment, which in practice means a CDC on most standard blocks. That's not a reason to avoid freestanding — sometimes the far corner is where the afternoon sun is — it's a reason to know the path before ordering posts. Attachment carries its own obligations too: the connection into the house frame and the flashing at the wall are building details that decide whether the structure stays dry, whatever the approval status.
Heritage conservation areas: check before you design
On the Lower North Shore this is the caveat that bites most often. Willoughby, Mosman and North Sydney councils all map heritage conservation areas — and inside one, the exempt pathway generally disappears even for a modest open pergola. Expect a DA, with the council interested in materials, roof form and how the structure reads against the house. The practical advice: find out whether you're in a conservation area before the design conversation, because it shapes what's worth drawing. A federation home in a mapped street might land on a rough-sawn hardwood frame with an open top rather than the insulated-panel roof the neighbours over the boundary line could build without asking anyone.
Bushfire pockets and BAL ratings
Parts of the North Shore back onto bush, and mapped bushfire-prone land brings Bushfire Attack Level ratings into the picture. For pergolas the practical effect lands mostly on roofed designs: at the higher BAL ratings, roofing and key components are expected to be non-combustible — steel over timber battens, metal sheeting over polycarbonate. An open pergola has fewer material constraints, but the rating still shapes sensible choices. If your block edges the bush around Castlecrag or Northbridge, the BAL rating belongs in the first design conversation, not the last.
Not sure which column your backyard lands in? Send a photo of the space and we'll tell you —our pergolas and patios serviceincludes the approval path, in writing, with the quote.
What happens if you build without approval
Honestly: often nothing, for a while — and then it matters at the worst time. Council can order an unapproved structure rectified or removed. Pre-sale building reports flag it, and buyers' conveyancers ask questions that stall settlements. Insurers can get difficult about claims involving an unapproved structure, which is a bad discovery to make after a storm. If you've inherited an unapproved pergola with the house, sound structures can often be regularised through a certifier — a building information certificate is the usual instrument — but that route costs more in time and fees than the paperwork would have. The approvals are the cheap part of a pergola; skipping them is a false economy.
How we handle it
Every quote we give includes the approval answer in writing: exempt, CDC or DA, for your structure on your block. If it's exempt, we say so and you can book the build. If it needs a CDC, the certification runs in parallel with material lead times, so it rarely delays a well-planned job by much. If you're in a conservation area, we tell you before the design gets expensive. And if you're planning the full outdoor room — building a deck under it? — the deck rules are in our deck council approval guide, and designing deck and pergola as one structure is the cleanest way through both rulebooks: shared posts, one approval assessment, one build.