North Shore & Northern Beaches
Private building certifier in the Hornsby Shire Council area
Throughout Hornsby Shire, CertifiBuild certifies new homes, additions, outbuildings and pools. Bushfire is the big local issue. Most of the shire is bushland or national park. So the bushfire rating often settles the approval path before design work begins.
Local plan
Hornsby Local Environmental Plan 2013
Bushfire prone land
Large parts
Flood planning
Council mapping
Heritage areas
Most suburbs
Most building activity right now
The 10 busiest suburbs for building work in Hornsby
Ranked by ABS building approvals for new homes, duplexes, townhouses and renovations over the 12 months to August 2026. Choose a suburb for its local guide.
Local rules
What shapes approvals here.
A shire that is mostly bush
Hornsby Shire spans 510 square kilometres, reaching from the M2 up to Wisemans Ferry. Around seventy per cent is national park or land zoned for environmental purposes. Urban zones make up only around a tenth. So many ordinary suburban blocks still sit close to bushland.
How bushfire affects your approval
If mapped bushland or its buffer reaches your lot, it is treated as bushfire prone. That takes in plenty of homes in suburbs such as Galston, Westleigh and Hornsby Heights. These lots need a bushfire attack level (BAL) assessment. The BAL rates how exposed a site is to flame, radiant heat and embers.
A complying development certificate (CDC) is a code-based approval a private certifier can issue. It cannot be issued where the rating is Flame Zone or BAL-40. In that case the work needs a development application (DA) to council, with a bushfire report. An asset protection zone may also shrink the area you can build on. This is a cleared buffer kept around the home.
Which planning rules apply?
The main rulebook is the Hornsby Local Environmental Plan 2013. The detailed design rules are in the Hornsby Development Control Plan 2024. It also has parts for rural land and for the river settlements on the Hawkesbury.
Some land below the M2 was once part of Hornsby Shire. That land has moved into the City of Parramatta. Parramatta's rules now apply. Older paperwork may still say Hornsby. We check the planning certificate to confirm the current council.
Your next step
Send us a survey with levels, your current drawings and the planning certificate. We will check the bushfire position first and then confirm the approval path.
Local know-how
Hornsby suburbs and the issues each one raises
Pennant Hills
Pennant Hills grew as a railway town after its station opened in 1887. Census 2021 counted separate houses at 73.3 per cent of all lived-in homes. The Crescent Heritage Conservation Area is a largely intact Federation subdivision laid out with formal gardens. There, council looks for low-scale homes, traditional materials and few garages or carports at the street. Council also seeks single-storey homes there. A new garage, front fence and driveway should be drawn along with the house.
Cherrybrook
Cherrybrook was subdivided from orchard land from the 1970s. Most homes are family houses, at 81.5% in 2021. On 7 August 2026, the state finalised the rezoning of the metro station precinct. Lots inside it follow new maps. Beyond its boundary, a rear extension or a pool still follows the usual house rules. Council's landscaped area rule leaves out pools and hard paving, so test every structure together.
Berowra Heights
Berowra Heights is almost entirely houses, at 93.8%. Common jobs are granny flats, pools, extra bedrooms and covered outdoor areas. A big backyard can still fall short on garden area once the pool, paths and sheds are counted. A granny flat must also fit with the current house, the parking and the access.
Brooklyn
By 1883, land in Brooklyn was already being divided up and sold under its current name. It is a river village with hillside pole homes and a working waterfront. Council's plan sets street setbacks for named roads, for example three metres on Brooklyn Road and nil on Dangar Road. Jetties are measured against local limit diagrams that consider navigation and public access. Boat sheds and ramps may also need separate waterway authorisations.
How CertifiBuild helps Hornsby projects run smoothly
CertifiBuild certifies houses, granny flats and Class 10 work like pools, sheds and decks, and nothing larger. Our team regularly works across the shire, from rail suburbs to river settlements. We read the Hornsby plans for your lot early, including any precinct maps. Calls and emails are answered promptly. We schedule inspections around your build program, so each stage can move on without delay. Where a lot cannot use a complying development certificate, we say so early and plainly.
Suburbs we cover
All 39 suburbs in Hornsby
We certify homes and Class 10 structures in every suburb listed. Some suburbs cross council boundaries, so we always confirm the council on your planning certificate.
- Arcadia
- Asquith
- Beecroft
- Berowra
- Berowra Creek
- Berowra Heights
- Berowra Waters
- Berrilee
- Brooklyn
- Canoelands
- Castle Hill
- Cheltenham
- Cherrybrook
- Cowan
- Dangar Island
- Dural
- Fiddletown
- Forest Glen
- Galston
- Glenhaven
- Glenorie
- Hornsby
- Hornsby Heights
- Laughtondale
- Maroota
- Middle Dural
- Milsons Passage
- Mount Colah
- Mount Kuring-gai
- Normanhurst
- North Epping
- Pennant Hills
- Singletons Mill
- Thornleigh
- Wahroonga
- Waitara
- West Pennant Hills
- Westleigh
- Wisemans Ferry
Nearby council areas
Neighbouring councils we cover.
Building near a council boundary, or planning another project close by? Each neighbouring council page explains its own local rules.
Our services
From approval to sign-off.
One certifier for the whole job, whichever council your lot is in.
Local questions
Questions we hear in this area.
No two lots are alike. Share your address and we will review the maps that cover it.
All council areasWhy does bushfire come first on a Hornsby job?
Because national parks and environmental zones make up around seventy per cent of Hornsby Shire, so many ordinary suburban blocks sit close to the bush. If mapped bushland or its buffer reaches your lot, it is treated as bushfire prone. The bushfire attack level (BAL) then sets the building standard and decides whether a complying development certificate (CDC) is possible. A cleared buffer around the home, which planners call an asset protection zone, may also shrink the buildable area. Suburbs such as Galston, Westleigh and Hornsby Heights have plenty of affected homes, so we check the rating first.
What if my lot has a Flame Zone or BAL-40 rating?
At Flame Zone or BAL-40, a complying development certificate (CDC) cannot be issued, so the work would need a development application (DA) to council, supported by a bushfire report. That only works if the use is permitted in the zone. These ratings mean the site faces the most severe exposure to flame, radiant heat and embers, so construction requirements are demanding. An asset protection zone may also be needed, cutting into the buildable area. Talk to a bushfire consultant early, and we can explain what follows once council approves, including the construction certificate.
My home lies below the M2. Is it still in Hornsby Shire?
Possibly not. A strip of former Hornsby Shire land below the M2 now belongs to Parramatta council, whose planning rules govern it. Older paperwork, such as past approvals or contracts, may still say Hornsby. This matters, since Hornsby and Parramatta use different plans and design rules, and using the wrong set can lead to drawings that do not comply. Your planning certificate confirms the current council and plan for your address. Send it with your survey, and we will check it before reviewing any design.
Building in this area?
Send us the address first.
We check the local maps for your lot, confirm the approval path and quote in writing.