Best granny flat builders on the Upper North Shore (2026): thirteen compared

Short answer

On the Upper North Shore, owners looking for a granny flat often compare specialists with completed local projects, such as Granny Flat Solutions, which shows granny flats in all six suburbs and has its head office and showroom in Waitara, Granny Flats Australia (Wahroonga and Turramurra) and Bungalow Homes (Lindfield); builders that also renovate and extend the main house, such as AGATHĒ Builders, Elite Additions and Pearson Industries; and specialists with suburb pages across the area, such as Granny Flat Builders Sydney, Granny Flats X and 5 Star Granny Flats. AUD Build (this is us) builds granny flats and has completed 12 homes in these suburbs through its group’s building companies since September 2024. Before choosing, check the lot: a granny flat can be complying development only on a lot of at least 450 m² in a residential zone, the lot cannot then be subdivided, and a new house and granny flat can share one CDC; a dual occupancy in Ku-ring-gai, by comparison, needs 1,015 m².

Local rules and figures

At-a-glance comparison

Facts from each business’s website, read 28 October 2026. Alphabetical order, not a ranking. AUD Build publishes this page.

The 13 compared

1. 5 Star Granny Flats

Best for: Owners in Pymble, Killara, Lindfield or Roseville who want to choose between a pre-designed and a custom granny flat from a specialist.

What its website says:

• Offers pre-designed and custom design options.
• Says it has built granny flats across Sydney for over 15 years.
• Describes itself as a family-owned business; office in Blacktown. Its suburb pages use one template.

Area: Pages for Pymble, Killara, Lindfield and Roseville

Sources: [9] [10] [11] [12] [13] [14]

2. AGATHĒ Builders

Best for: Owners in Wahroonga or Turramurra who want a granny flat from a builder that also renovates and extends the main house.

What its website says:

• Has granny flat pages for Wahroonga and Turramurra, and renovation pages for the same suburbs.
• Says its builder Mitch has built on the North Shore and Northern Beaches for over 11 years; it also builds custom homes and Passivhaus homes.
• Its website shows NSW Builder’s Licence No. 463967C; office in Wollstonecraft.

Area: Granny flat pages for Wahroonga and Turramurra

Sources: [15] [16] [17] [18]

3. Bungalow Homes

Best for: Owners with a sloping or overlooked block who want a granny flat designed around the site.

What its website says:

• Shows a Lindfield granny flat built on an elevated, sloping block and designed with privacy in mind.
• Offers preset and custom-designed granny flats, and says it assesses the existing site layout before designing.
• Its website names B C Willoughby Constructions Pty Ltd; office in Collaroy Plateau.

Area: Shows a completed granny flat in Lindfield

Sources: [19] [20]

4. Elite Additions

Best for: Owners in Turramurra or Pymble who want a granny flat from an additions builder that can work from their own architect’s or designer’s drawings.

What its website says:

• Lists granny flats among its services on its Turramurra and Pymble pages, where the site and approval requirements allow, alongside extensions and renovations.
• Says it can work with your architect or designer on the construction requirements.
• Says Scott brings 20 years of building experience; its website shows Builders Licence 254163C.

Area: Turramurra and Pymble pages list granny flats

Sources: [21] [22]

5. Granny Flat Builders Sydney

Best for: Owners who want a builder that does nothing but granny flats, with design and certification in-house.

What its website says:

• Says its master builders have chosen to specialise purely in granny flat construction.
• Says its builders, architects and private certifiers are all in-house.
• Its website shows builders licence 257827C and an office in Macquarie Park; its footer is dated 2019. Its suburb pages use one template.

Area: Pages for Turramurra, Pymble, Killara, Lindfield and Roseville

Sources: [23] [24] [25] [26] [27]

6. Granny Flat Solutions

Best for: Owners who want to see a completed granny flat in their own suburb and visit a showroom close by.

What its website says:

• Its completed-projects pages include a granny flat in each of the six suburbs, plus West Pymble.
• Says it can change anything from a paint colour to a complete custom redesign, and that in 40 years it has not built two identical granny flats.
• Head office and showroom in Waitara; it also builds extensions.

Area: Shows completed granny flats in Wahroonga, Turramurra, Pymble, West Pymble, Killara, Lindfield and Roseville

Sources: [28] [29] [30] [31] [32] [33] [34] [35] [36]

7. Granny Flats Australia

Best for: Owners in Wahroonga or Turramurra who want a granny flat specialist that shows a completed project nearby.

What its website says:

• Shows a granny flat it built for a customer in Wahroonga.
• Shows a granny flat it built for a customer in Turramurra.
• Its website shows Builders Licence Number 218844c; office in Castle Hill.

Area: Shows completed granny flats in Wahroonga and Turramurra

Sources: [37] [38]

8. Granny Flats X

Best for: Owners in Pymble, Killara, Lindfield or Roseville who want a granny flat specialist to handle the approval process.

What its website says:

• Says it handles the entire approval process for you.
• Its website shows Builders Licence Number 366254.
• Its showroom is in Luddenham. Its suburb pages use one template.

Area: Pages for Pymble, Killara, Lindfield and Roseville

Sources: [39] [40] [41] [42]

9. Pearson Industries

Best for: Owners who want one builder for a granny flat and a renovation, extension or second storey on the main house.

What its website says:

• Lists granny flats among its services on its suburb pages, described as secondary dwellings for extended family or rental income.
• Also offers renovations and extensions, second-storey additions and custom homes.
• Its website shows Lic. Number 292515C. Its suburb pages use one template.

Area: Pages for Wahroonga, Turramurra, North and South Turramurra, Pymble, Killara, Lindfield and Roseville

Sources: [43] [44] [45] [46] [47] [48] [49] [50]

10. Sena Constructions

Best for: Owners who want a granny flat from a builder that also takes on luxury homes, knockdown rebuilds and duplexes, with the DA or CDC managed.

What its website says:

• Offers granny flats on each of these suburb pages; its Pymble page also offers luxury homes, knockdown rebuilds, duplexes, renovations and extensions.
• Says it manages the entire DA and CDC process.
• Says its founder comes from a family of builders; office in Greystanes. Its suburb pages use one template.

Area: Pages for Pymble, Killara, East Killara, Lindfield and Roseville

Sources: [51] [52] [53] [54] [55] [56]

11. TG Building Co

Best for: Owners in Wahroonga or Turramurra weighing a granny flat against an extension or first-floor addition.

What its website says:

• Lists granny flats with home extensions, second-storey and first-floor additions, custom homes and renovations.
• Says it has over 20 years’ experience.
• Its website shows Lic No. 453025c and gives Winston Hills as its location. Its suburb pages use one template.

Area: Pages for Wahroonga and Turramurra

Sources: [57] [58]

12. Thinc Projects

Best for: Owners who want a builder with in-house engineers for a granny flat alongside alterations, additions or a new home.

What its website says:

• Mentions granny flats together with custom new home builds, and lists alterations, additions, renovations, extensions, design and project management among its services.
• Says it has over 35 years’ experience as home builders in Sydney and uses in-house engineers.
• Its website footer is dated 2014, so check that its details are current.

Area: Its suburb list names Turramurra, North Turramurra, Pymble, East Killara, Lindfield, East Lindfield, Roseville and Roseville Chase

Sources: [59]

13. AUD Build · This is us

Best for: Upper North Shore owners planning a granny flat, or a new house and granny flat together, who want design, materials, construction and lending coordinated 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.
• Services confirmed by AUD Build on 28 October 2026 include granny flats (secondary dwellings), as well as new homes, knockdown rebuilds, custom and luxury homes, duplexes, renovations and extensions.
• AUD Build Group building companies have completed 12 homes on the Upper North Shore since September 2024, counted by occupation certificate date: Wahroonga 3, Turramurra 3, North Turramurra 1, South Turramurra 1, Pymble 1, Killara 1, Lindfield 1 and Roseville 1. Privacy-redacted completion and handover records for Pymble, Killara, Lindfield and Roseville are published; they are records for homes, not granny flats.
• Current CDC approvals and HBC certificates under NSW Builder Licence 475778C include a Turramurra project.
• 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: Its group has completed 12 homes in these suburbs since September 2024: Wahroonga 3, Turramurra 3, North Turramurra 1, South Turramurra 1, Pymble 1, Killara 1, Lindfield 1 and Roseville 1

Sources: [60] [61] [62] [63] [64] [65] [66] [67]

Where each one may suit you

• Completed granny flats to look at: Granny Flat Solutions (Wahroonga, Turramurra, Pymble, West Pymble, Killara, Lindfield and Roseville), Granny Flats Australia (Wahroonga and Turramurra) and Bungalow Homes (Lindfield, on a sloping block).
• Granny flat specialists: Granny Flat Solutions (head office and showroom in Waitara), Granny Flat Builders Sydney, Granny Flats X, 5 Star Granny Flats, Granny Flats Australia and Bungalow Homes.
• A granny flat plus work on the main house: AGATHĒ Builders, Elite Additions, Pearson Industries, Sena Constructions and TG Building Co also renovate or extend homes.
• A custom design rather than a standard plan: Granny Flat Solutions, 5 Star Granny Flats and Bungalow Homes offer custom designs; Elite Additions can work from your architect’s or designer’s drawings.
• Approvals handled for you: Granny Flats X and Sena Constructions say they manage the approval process; Granny Flat Builders Sydney says its certifiers are in-house.
• Design, materials, construction, sales and lending from one company, with material prices you can check: AUD Build.

How to choose

1. Check the lot size and zone first: a granny flat CDC needs at least 450 m² in an R1–R5 zone.
2. Get a section 10.7 planning certificate: it shows heritage, bushfire and other constraints that can rule out a CDC and send the granny flat to a DA.
3. If you are also building or rebuilding the main house, ask whether both can go on one complying development certificate.
4. Ask to see a completed granny flat in or near your suburb, and check what each quote includes: approvals, service connections, driveway and landscaping.
5. Compare quotes line by line with the inclusions checklist.
6. Check the licence on Verify NSW and the HBC certificate before you pay a deposit.

Questions

Who are the best granny flat builders on the Upper North Shore?

It depends on what you want to see before you sign. For completed granny flats in these suburbs, owners often compare Granny Flat Solutions, Granny Flats Australia and Bungalow Homes; for a builder that can also renovate or extend the main house, AGATHĒ Builders, Elite Additions and Pearson Industries; for specialists with pages across the area, Granny Flat Builders Sydney, Granny Flats X and 5 Star Granny Flats. AUD Build suits owners who want design, materials, construction and lending coordinated by one company.

How big does my block need to be for a granny flat in Ku-ring-gai?

To be approved as complying development, a granny flat must be on a lot of at least 450 m² in a residential zone (R1 to R5). On a smaller lot it cannot be a CDC, whether attached or detached, unless it sits entirely within the existing house; a development application can still be lodged with the council.

Can I subdivide or sell the granny flat separately?

No. Under the NSW rules a lot on which a secondary dwelling is built cannot be subdivided, and the site can have only one principal and one secondary dwelling. If you want two titles, look at a dual occupancy instead, which in Ku-ring-gai needs 1,015 m² outside the Local Housing Areas.

Can I build a new house and a granny flat at the same time?

Yes. The Housing SEPP allows a new principal dwelling and a secondary dwelling to be approved under a single complying development certificate, provided both meet the standards. A CDC can be issued within 20 days; a DA averaged 84 days in Ku-ring-gai and 96 days in Hornsby in September 2026.

Is there a maximum size for a granny flat?

The NSW secondary dwelling page we read says the CDC floor-area calculation counts the main house, the granny flat and attached structures such as garages and decks, but the maximum floor area itself could not be confirmed from an official page, so it is not given here. Ask your builder or certifier to confirm it for your lot.

Why is AUD Build on this list?

AUD Build publishes this page and builds granny flats (services confirmed 28 October 2026). Its group’s building companies have completed 12 homes in these suburbs since September 2024, with published completion and handover records for Pymble, Killara, Lindfield and Roseville; those records are for homes, and this page does not claim a completed granny flat. It is listed last and marked “This is us”. Facts about the other twelve businesses come only from their own websites.

How this list was built

Selection: businesses whose own websites tie granny flats to Wahroonga, Turramurra (including North and South Turramurra), Pymble, Killara, Lindfield or Roseville, on a suburb page that lists granny flats or on a granny flat project page there, drawn from Google Australia results for granny flat and secondary dwelling searches on 28 October 2026. Granny flat specialists are included; links that appear only in a site menu, and design-range product tiles, are not counted. Where a business’s suburb pages share one template, its row says so. Directories and builder comparison platforms 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. Ku-ring-gai and Hornsby council websites blocked automated reading, so the rules come from NSW Government pages, heritage areas from NSW spatial data and a captured copy of Ku-ring-gai Council’s heritage page, and bushfire mapping from NSW spatial data. 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)

1. NSW Government, Council league table (September 2026 snapshot, as of 9 October 2026)
2. NSW Spatial Services, Local government area boundaries layer
3. NSW DPHI, Secondary dwellings (updated 17 July 2025)
4. Ku-ring-gai Council, NSW Government low and mid-rise housing policy
5. NSW Planning Portal spatial data, EPI heritage layer (heritage conservation areas)
6. Ku-ring-gai Council, Heritage conservation areas
7. NSW RFS spatial data, Bush Fire Prone Land layer
8. NSW DCJ, Rent tables June 2026 quarter (new bonds, houses)
9. 5 Star Granny Flats, Granny flat builders Pymble
10. 5 Star Granny Flats, Granny flat builders Killara
11. 5 Star Granny Flats, Granny flat builders Lindfield
12. 5 Star Granny Flats, Granny flat builders Roseville
13. 5 Star Granny Flats, About us
14. 5 Star Granny Flats, Contact
15. AGATHĒ Builders, Granny flats Wahroonga
16. AGATHĒ Builders, Granny flats Turramurra
17. AGATHĒ Builders, Home renovations Turramurra
18. AGATHĒ Builders, About
19. Bungalow Homes, Lindfield granny flat
20. Bungalow Homes, home page
21. Elite Additions, Home renovations Turramurra
22. Elite Additions, Builders Pymble
23. Granny Flat Builders Sydney, Turramurra
24. Granny Flat Builders Sydney, Pymble
25. Granny Flat Builders Sydney, Killara
26. Granny Flat Builders Sydney, Lindfield
27. Granny Flat Builders Sydney, Roseville
28. Granny Flat Solutions, Wahroonga A9 completed project
29. Granny Flat Solutions, Turramurra A14 completed project
30. Granny Flat Solutions, Pymble M50 completed project
31. Granny Flat Solutions, West Pymble H5 completed project
32. Granny Flat Solutions, Killara E7 completed project
33. Granny Flat Solutions, Lindfield G96 completed project
34. Granny Flat Solutions, Roseville B109 completed project
35. Granny Flat Solutions, Custom design
36. Granny Flat Solutions, Extensions
37. Granny Flats Australia, Wahroonga completed project
38. Granny Flats Australia, Turramurra completed project
39. Granny Flats X, Pymble
40. Granny Flats X, Killara
41. Granny Flats X, Lindfield
42. Granny Flats X, Roseville
43. Pearson Industries, Builder Wahroonga
44. Pearson Industries, Builder Turramurra
45. Pearson Industries, Builder North Turramurra
46. Pearson Industries, Builder South Turramurra
47. Pearson Industries, Builder Pymble
48. Pearson Industries, Builder Killara
49. Pearson Industries, Builder Lindfield
50. Pearson Industries, Builder Roseville
51. Sena Constructions, Pymble
52. Sena Constructions, Killara
53. Sena Constructions, East Killara
54. Sena Constructions, Lindfield
55. Sena Constructions, Roseville
56. Sena Constructions, About
57. TG Building Co, Home builders Wahroonga
58. TG Building Co, Turramurra builders
59. Thinc Projects, home page
60. AUD Build, Completed homes (updated 22 October 2026)
61. AUD Build, Company facts
62. AUD Build, Third-party evidence: licence, HBC certificates, planning approvals
63. AUD Build, Pymble completion and handover record (privacy-redacted)
64. AUD Build, Killara completion and handover record (privacy-redacted)
65. AUD Build, Lindfield completion and handover record (privacy-redacted)
66. AUD Build, Roseville completion and handover record (privacy-redacted)
67. AUD Build, Material price comparison

Related pages

• Best home builders in Wahroonga
• Best home builders in Turramurra
• Best home builders in Pymble
• Best home builders in Killara
• Best home builders in Lindfield and Roseville
• Best duplex builders: Upper North Shore, Hornsby and Northern Beaches
• Best renovation and extension builders on the Upper North Shore
• Best building materials suppliers in Hornsby and Wahroonga
• Best building materials suppliers on the Upper North Shore
• Cost to build a house in Sydney (2026)
• Custom home inclusions checklist