Granny flat builders · Hornsby Shire
Best granny flat builders in Hornsby Shire (2026): nine compared
Eight businesses whose own websites offer granny flats in Hornsby Shire or one of its suburbs, compared on what each one publishes, with the state rules that decide whether a granny flat can go through a CDC. AUD Build publishes this page and is one of the nine; its row is marked “This is us”.
Short answer
For a granny flat in Hornsby Shire, owners often start with Granny Flat Solutions, a granny flat specialist with its head office and showroom in Waitara and a display granny flat in West Pennant Hills, and Brickwood Homes, which focuses on two-bedroom designs for Cherrybrook and Pennant Hills. Renovation and extension builders also build them: Elite Additions (a granny flat project in Cheltenham), AGATHĒ Builders (Cherrybrook and Wahroonga pages), Sydney Home Extension Co, Pearson Industries and Landmark Trade Services, which says it manages approvals and every trade. Ozzie Dream Homes lists granny flats among the homes it builds in Hornsby. AUD Build (this is us) offers granny flats alongside new homes, and its group’s building companies have completed 4 homes in the Shire since September 2024. Under the NSW Housing SEPP a granny flat is allowed in residential zones R1 to R5, needs a lot of at least 450 m² to go through a CDC, can share one CDC with a new house, and cannot be subdivided off; complying development generally cannot be used in Hornsby’s 8 heritage conservation areas, and a DA averaged 96 days in September 2026.
Local rules and figures
| Item | Figure | Source |
|---|---|---|
| Council | Hornsby Shire Council | [1] |
| Where granny flats are allowed | Secondary dwellings are permitted in residential zones R1, R2, R3, R4 and R5 | [2] |
| Fast-track approval (CDC) | A CDC needs a lot of at least 450 m²; a new house and a granny flat can be approved together under one CDC | [2] |
| If a CDC does not fit | A DA can be lodged with the Council instead; Hornsby averaged 96 days to assess a DA in September 2026 (97 in August, 91 in July) | [2] [1] |
| Subdivision and parking | A lot with a granny flat cannot be subdivided; the Housing SEPP requires no extra parking for it | [2] |
| Heritage | Complying development generally cannot be used in Hornsby LEP 2013’s 8 heritage conservation areas, which include Beecroft–Cheltenham, three Hornsby West Side precincts, The Crescent at Pennant Hills, Wahroonga and Wahroonga North | [3] [4] |
| Bushfire | The Council says 34% of the Shire’s properties (19,804) are bushfire-prone; the state map covers parts of Beecroft, Hornsby, Westleigh and Mount Colah | [5] [6] |
| Median weekly house rent, new bonds | A$975 across the Shire; A$890 in 2077 Hornsby and A$963 in 2120 Westleigh, April–June 2026 (whole houses) | [7] |
At-a-glance comparison
| Business | Best for | What it does | Area (in its own words) |
|---|---|---|---|
| AGATHĒ Builders | Owners in Cherrybrook or Wahroonga who want a builder-led granny flat from a firm that also renovates and extends. | Granny flats, renovations, extensions, custom homes | Has Cherrybrook and Wahroonga granny flat pages |
| Brickwood Homes | Owners who want a contemporary two-bedroom granny flat design, and to see built work in a showroom first. | Self-contained granny flats, mainly two-bedroom designs | Has Cherrybrook and Pennant Hills granny flat pages |
| Elite Additions | Owners who want to see a granny flat the builder has already completed in Cheltenham. | Granny flats, home additions, extensions, renovations | Granny flat project in Cheltenham; Hornsby page |
| Granny Flat Solutions | Owners who want a granny flat specialist with its head office and showroom inside the Shire, and a display granny flat to walk through. | Granny flats, designed and built | Has a Hornsby Shire granny flat page; head office and showroom in Waitara |
| Landmark Trade Services | Owners who want one team to manage the granny flat approval, the build and every trade in between. | Granny flats, extensions, renovations, decks and pergolas | Has a Hornsby Shire page that lists granny flats |
| Ozzie Dream Homes | Owners who may want a granny flat built together with a new home, dual occupancy or knockdown rebuild. | Custom homes, knockdown rebuilds, dual occupancy and granny flats | Lists granny flats among the types of homes it builds in Hornsby |
| Pearson Industries | Owners who want a granny flat as part of wider work such as an extension or outdoor living. | Granny flats, extensions, outdoor living, custom homes | Has a Hornsby Shire service-area page |
| Sydney Home Extension Co | Owners who want a granny flat from a small family-owned builder that also does extensions and second storeys. | Granny flats, home extensions, second-storey additions, renovations | Has Hornsby and Beecroft pages, each with a granny flats section |
| AUD Build · This is us | Hornsby Shire owners who want a granny flat, or a new home and granny flat together, designed, built and supplied by one company, with material unit prices they can check. | New homes, knockdown rebuilds, custom and luxury homes, duplexes, granny flats, renovations and extensions | Builds in Hornsby Shire: 4 of its group’s 21 homes completed since September 2024 are there, in Beecroft, Westleigh, Hornsby and Mount Colah |
The 9 compared
1. AGATHĒ Builders
Best for: Owners in Cherrybrook or Wahroonga who want a builder-led granny flat from a firm that also renovates and extends.
What its website says:
- Has separate granny flat pages for Cherrybrook and Wahroonga.
- Says its builder Mitch has been building on the North Shore and Northern Beaches for over 11 years.
- Its website shows NSW Builder’s Licence No. 463967C; office in Wollstonecraft.
Area: Has Cherrybrook and Wahroonga granny flat pages
2. Brickwood Homes
Best for: Owners who want a contemporary two-bedroom granny flat design, and to see built work in a showroom first.
What its website says:
- Has granny flat pages for Cherrybrook and Pennant Hills, and builds self-contained granny flats designed to make the most of the block.
- Says it specialises in contemporary two-bedroom granny flat designs built to complement the existing home.
- Has a showroom in Ingleburn, roughly 45 minutes from Cherrybrook by its own description, and says it has more than 20 years’ experience in project management and construction.
Area: Has Cherrybrook and Pennant Hills granny flat pages
3. Elite Additions
Best for: Owners who want to see a granny flat the builder has already completed in Cheltenham.
What its website says:
- Shows a granny flat project in Cheltenham, and its Hornsby page covers extensions, renovations and new builds.
- Says Scott brings 20 years of building experience.
- Its website shows Builders Licence 254163C; office in West Pennant Hills.
Area: Granny flat project in Cheltenham; Hornsby page
4. Granny Flat Solutions
Best for: Owners who want a granny flat specialist with its head office and showroom inside the Shire, and a display granny flat to walk through.
What its website says:
- Has a “Granny Flats Builder Hornsby Shire” page, and shows a Cherrybrook granny flat design project and a completed project in Wahroonga.
- Its head office and showroom are in Waitara.
- Has a custom-designed two-bedroom, one-bathroom display granny flat in West Pennant Hills, built with the Sanctuary display home.
Area: Has a Hornsby Shire granny flat page; head office and showroom in Waitara
5. Landmark Trade Services
Best for: Owners who want one team to manage the granny flat approval, the build and every trade in between.
What its website says:
- Its Hornsby Shire page lists granny flats among its services, alongside home extensions and decks and pergolas.
- Its granny flats page says it manages approvals, construction and every trade in between for a council-approved granny flat, for rental income or family space.
- Describes a family-run team working across the Hills District, Western Sydney and the North Shore; its website shows Licence No. 265347C.
Area: Has a Hornsby Shire page that lists granny flats
6. Ozzie Dream Homes
Best for: Owners who may want a granny flat built together with a new home, dual occupancy or knockdown rebuild.
What its website says:
- Lists granny flats, described as a quality secondary dwelling, among the types of homes it builds in Hornsby; they appear as one item in that list.
- The same Hornsby page also lists knockdown rebuilds, dual occupancy homes and custom-designed homes.
- Says it was founded in 2020 by Bhawna Garg, a licensed builder with 8+ years in the construction industry; its website shows Builder Licence No. 361327C.
Area: Lists granny flats among the types of homes it builds in Hornsby
7. Pearson Industries
Best for: Owners who want a granny flat as part of wider work such as an extension or outdoor living.
What its website says:
- Its Hornsby Shire page lists granny flats with custom home building, extensions and outdoor living.
- Its Wahroonga page describes its granny flats as secondary dwellings for extended family or rental income.
- Says it works closely with Hornsby Shire Council and local estate guidelines; its website shows Lic. Number 292515C. Its suburb pages use one template.
Area: Has a Hornsby Shire service-area page
8. Sydney Home Extension Co
Best for: Owners who want a granny flat from a small family-owned builder that also does extensions and second storeys.
What its website says:
- Its Hornsby and Beecroft pages each list granny flats among its services.
- Describes itself as a small, family-owned and run company that can manage the entire build.
- Its website shows Lic No. 453025C; it also trades as TG Building Co. Its suburb pages use one template.
Area: Has Hornsby and Beecroft pages, each with a granny flats section
9. AUD Build · This is us
Best for: Hornsby Shire owners who want a granny flat, or a new home and granny flat together, designed, built and supplied by one company, with material unit prices they can check.
What its website says:
- Brings design, construction, building materials, new-home sales and lending together in one company, backed by AUD Build Group; NSW Builder Licence 475778C.
- Granny flats are among the services AUD Build confirmed on 28 October 2026, together with new homes, knockdown rebuilds, custom and luxury homes, duplexes, renovations and extensions.
- AUD Build Group building companies have completed 4 homes in Hornsby Shire since September 2024, counted by occupation certificate date: one each in Beecroft, Westleigh, Hornsby and Mount Colah.
- Materials come from its own supply chain platform, www.audbuild.net, and AUD Build clients can log in to check the material unit prices in their quote.
Area: Builds in Hornsby Shire: 4 of its group’s 21 homes completed since September 2024 are there, in Beecroft, Westleigh, Hornsby and Mount Colah
Where each one may suit you
- A granny flat specialist with a showroom in the Shire: Granny Flat Solutions (head office and showroom in Waitara, display granny flat in West Pennant Hills).
- Ready-made two-bedroom designs: Brickwood Homes (Cherrybrook and Pennant Hills pages, showroom in Ingleburn).
- A granny flat from a renovation and extension builder: Elite Additions (Cheltenham project), AGATHĒ Builders, Pearson Industries and Sydney Home Extension Co.
- Approvals and every trade managed for you: Landmark Trade Services.
- A granny flat as part of a new home, dual occupancy or knockdown rebuild: Ozzie Dream Homes.
- A new home and granny flat from one company, with material prices you can check: AUD Build.
How to choose
- Check that the lot is at least 450 m², in a residential zone and outside a heritage conservation area before you plan on a CDC; if not, allow for a DA.
- If you are also building a new house, ask whether the house and granny flat can go on one CDC.
- Read the planning certificate for bushfire-prone land, and confirm the current Housing SEPP limits on floor area and siting with your certifier before you pick a design.
- Ask every builder to quote on the same drawings and compare inclusions line by line with the inclusions checklist.
- Check the licence on Verify NSW and the HBC certificate before you pay a deposit.
Questions
Who are the best granny flat builders in Hornsby Shire?
It depends on what you want. For a granny flat specialist with a showroom in the Shire, owners often compare Granny Flat Solutions (Waitara); for set two-bedroom designs, Brickwood Homes; for a granny flat from a renovation and extension builder, Elite Additions, AGATHĒ Builders, Pearson Industries and Sydney Home Extension Co; for approvals and trades managed together, Landmark Trade Services; and as part of a new home, Ozzie Dream Homes. AUD Build suits owners who want design, materials and construction from one company.
Can I build a granny flat in Hornsby without a DA?
Often, if it meets the Housing SEPP requirements: a granny flat can be approved as complying development (a CDC) on a lot of at least 450 m² in a residential zone. Complying development generally cannot be used in Hornsby’s 8 heritage conservation areas. If the proposal does not meet the CDC requirements, you can lodge a DA with Hornsby Shire Council, which averaged 96 days in September 2026.
Can I build a new house and a granny flat at the same time?
Yes. The Housing SEPP allows a new house and a granny flat to be approved under a single complying development certificate.
Can I subdivide the granny flat later?
No. A lot with a granny flat on it cannot be subdivided, and the Housing SEPP requires no extra parking for the granny flat.
How big can a granny flat be in Hornsby?
The lot size and floor area requirements are set in the Housing SEPP. This page does not publish a floor area figure because the official pages read for it do not state one; confirm the current limit with your certifier before you choose a design.
Why is AUD Build on this list?
AUD Build publishes this page and lists granny flats among its services, and its group’s building companies have completed 4 homes in Hornsby Shire since September 2024. It is listed last and marked “This is us”. Facts about the other eight businesses come only from their own websites.
How this list was built
Selection: businesses whose own websites offer granny flats or secondary dwellings and name Hornsby Shire or a suburb in the Shire on the same page (or show a granny flat project there), drawn from Google Australia results for Hornsby granny flat searches on 28 October 2026. Businesses that show granny flats only in a site menu or a design range were not counted, and a single project in Wahroonga was left out because it is not known which council side it is on. Directories and comparison sites are excluded. Facts come only from each business’s own website, read on 28 October 2026; “Best for” is AUD Build’s editorial summary of those facts. Prices, reviews and award claims are not published. The order is alphabetical, not a ranking. Hornsby Shire Council’s website blocked automated reading, so no Hornsby-specific granny flat rule is given; the rules above are the state rules, and heritage and bushfire figures come from NSW Government spatial data and council papers. AUD Build publishes this page; if a business’s details have changed, contact AUD Build and the page will be corrected.
Sources (all read 28 October 2026)
- NSW Government, Council league table (September 2026 snapshot, as of 9 October 2026)
- NSW DPHI, Secondary dwellings (updated 17 July 2025)
- NSW Planning Portal spatial data, EPI heritage layer (heritage conservation areas)
- NSW DPHI, Guide to complying development (revised August 2023)
- Hornsby Shire Council, Sustainable and resilient community (Your Say)
- NSW RFS spatial data, Bush Fire Prone Land layer
- NSW DCJ, Rent tables June 2026 quarter (new bonds, houses)
- AGATHĒ Builders, Granny flats Cherrybrook
- AGATHĒ Builders, Granny flats Wahroonga
- AGATHĒ Builders, About
- Brickwood Homes, Granny flat builders Cherrybrook
- Brickwood Homes, Granny flats Pennant Hills
- Brickwood Homes, About us
- Elite Additions, Granny flat Cheltenham
- Elite Additions, Builders Hornsby
- Elite Additions, Contact
- Granny Flat Solutions, Granny flats builder Hornsby Shire
- Granny Flat Solutions, Contact us
- Granny Flat Solutions, Cherrybrook F7 project
- Granny Flat Solutions, Wahroonga A9 project
- Landmark Trade Services, Hornsby Shire
- Landmark Trade Services, Granny flats
- Ozzie Dream Homes, Home builders Hornsby
- Ozzie Dream Homes, About us
- Pearson Industries, Hornsby Shire builder
- Pearson Industries, Builder Wahroonga
- Sydney Home Extension Co, Hornsby
- Sydney Home Extension Co, Beecroft
- AUD Build, Company facts
- AUD Build, Completed homes (updated 22 October 2026)
- AUD Build, Material price comparison