How much does a granny flat cost in Australia in 2026?

E2ES fixed prices: 30 m² Compact Studio $110,000 + GST. 60 m² Two-Bedroom $170,000 + GST. 60 m² Dual Living (two independent studios on one footprint) $200,000 + GST. Cash down is ~20% of build cost (~$32k–$52k); the other 80% is a construction loan secured against the new building. All three include permits, slab, frame, cladding, roof, insulation, kitchen, bathroom, flooring, AC, hot water, plumbing and electrical rough-in, and connection to existing mains within 10 m sewer / 15 m cabling.

What is the cheapest granny flat builder in Melbourne?

E2ES's 30 m² Compact Studio at $110,000 + GST is the lowest fixed turnkey price in our July 2026 survey of Melbourne granny flat builders — fully finished, permits and connections included, on an engineered concrete slab. Surveyed competitors' entry turnkey prices start around $133k, and independent 2026 guides put a finished 2-bed at $150k–$255k all-in. Cheaper stickers are kit shells or portable units on steel stumps, or exclude permits/connections/appliances that add $20k–$60k once tallied.

What is a granny flat?

A granny flat (also called a secondary dwelling, ancillary dwelling unit, ADU, backyard studio, or backyard cabin) is a fully self-contained secondary residence built on the same lot as the main house. In Australia it sits on a single title (no subdivision), is Class 1a compliant under NCC 2022, and can be either lived in by family or leased to a tenant for rental income.

How long does it take to build a granny flat?

2 months from decision to finished build: ~1 month of paperwork (design + building permit — no planning permit needed on most Victorian lots under the small second dwelling reform, Amendment VC253) + ~1 month of construction on site (4 weeks; 4–5 for the Dual Living). Typical Melbourne builders quote 4–7 months. A tenant typically moves in 2–3 weeks after handover.

Do I need council approval for a granny flat?

A building permit yes, a planning permit usually no. Victoria's small second dwelling reform (Amendment VC253, Dec 2023) removed the planning-permit requirement for dwellings ≤ 60 m² on lots ≥ 300 m² — E2ES's private surveyor issues the Class 1a Building Permit in 2–4 weeks, so paperwork closes in ~1 month. In NSW, lots ≥ 450 m² use the SEPP Complying Development pathway (~10 days, no neighbour consent). Heritage Overlay or DCP/DCPO sites add 6–12 months. E2ES handles the entire permit process — owner has zero paperwork.

Can I rent out a granny flat as a separate lease?

Yes. All E2ES designs are Class 1a self-contained dwellings, which means up to 3 leases per lot (NCC 2022 Class 1b threshold) without requiring a rooming-house licence. The 60 m² Dual Living layout is two fully independent studios on one footprint, each leasable as a standalone tenancy.

What is the rental yield on a granny flat?

Gross yields on build cost: 30 m² studio ~16.3% ($380/wk on $110k), 60 m² two-bed ~13.9% ($500/wk on $170k), 60 m² dual ~16.5% ($700/wk on $200k). Net yields on cash down are significantly higher (~33% on the 30 m²) because 80% of the build is financed via construction loan, leveraging the owner's existing land equity.

Do E2ES granny flats sit on a concrete slab or steel stumps?

Always an engineered reinforced concrete slab (AS 2870.1 Class M/H, waffle-pod or raft) with termite management — the same foundation as a full-size home, included in every fixed price. Portable and prefab units that undercut on price sit on steel stumps or a trailer chassis, which rent for less and are valued differently by banks.

What materials does E2ES build with?

The best Australian-made materials in the market, locked into the contract by brand: BlueScope Colorbond steel roof (Lysaght Klip-Lok 700), James Hardie Scyon Axon fibre-cement cladding, CSR Bradford Gold insulation, Australian MGP10 H2 termite-treated pine frame, silica-free engineered stone benchtops, double-glazed aluminium windows.

Does E2ES have real multi-lease / room-by-room rental experience?

Yes. OptimaRea, E2ES's property-management arm, runs 300+ tenancies including dual-living and multi-lease setups — separate leases, separate bonds, sub-metered utilities. All Class 1a compliant: up to 3 leases per lot with no rooming-house licence. The 60 m² Dual Living plan was designed from that operating experience.

Can I build a granny flat in Brisbane / Gold Coast / Sydney?

Yes. E2ES operates across Melbourne, Brisbane, Gold Coast and Sydney. Brisbane and Gold Coast follow the Queensland Development Code MP1.1 (Secondary Dwelling) — typically 400–600 m² minimum lot. Sydney uses the NSW Affordable Rental Housing SEPP 2009 (450 m² minimum, 10-day Complying Development). All four cities use the same three E2ES floor plans.

Transparent pricing

Granny flat cost in Australia 2026 —
fixed price, no surprises.

Every line item, every variation, every cash-flow scenario — laid out before you sign. E2ES is one of the few Australian granny flat builders that publishes a full fixed-price schedule with site-variance allowances disclosed up front.

By Yan Zhu · Co-Founder & Chief Data Officer, E2ES

Fixed price by plan (Melbourne / Brisbane / Gold Coast / Sydney)

Plan	Build price	Tax	Cash down (20% + permits)	Construction loan	Build window
30 m² Compact Studio	$110,000	+ GST	$32,000	$88,000	4 weeks on site
60 m² Two-Bedroom	$170,000	+ GST	$44,000	$136,000	4 weeks on site
60 m² Dual Living	$200,000	+ GST	$52,000	$160,000	4–5 weeks on site

Total timeline from your go-ahead: ~1 month of paperwork (design + building permit — no planning permit needed on most Victorian lots under the small second dwelling reform) + ~1 month of construction on site = 2 months decision → finished build. Overlay sites (heritage, bushfire, flood) are flagged in writing before contract.

What's included in the fixed price

Building permit (Class 1a) including private surveyor fees
6-star NatHERS energy assessment
Structural engineering certification
Soil test within standard allowance
Reinforced concrete slab (AS 2870.1 Class M/H, waffle-pod or raft)
Termite management (Termimesh / Kordon, AS 3660.1)
MGP10 timber-stud frame (AS 1684, N1 wind class)
James Hardie Scyon™ Axon™ 9 mm vertical cement-fibre cladding
CSR Bradford Enviroseal ProctorWrap (Class 4 vapour-permeable)
Bradford Gold™ R2.0 wall + R3.5 ceiling insulation
Colorbond Surfmist roof (Lysaght Klip-Lok 700, AS 1562.1)
Colorbond Charcoal half-round gutter + 100 mm round downpipes
Aluminium double-glazed windows in Colorbond Monument
Solid timber entry door, brushed-nickel lever
Internal plasterboard + paint (Dulux Natural White matt + Lexicon Quarter)
Silica-free engineered stone benchtop (post-July-2024 ban compliant)
Matt-white shaker kitchen joinery + cream porcelain tile splashback
Devanti 600 mm electric cooktop + 600 mm range hood (ducted to outside)
304 stainless single-bowl sink + Estilo chrome side-lever mixer (WELS 4-star)
SPC Hybrid 7 mm flooring (AC4 wear, 100% waterproof core)
Duratile Crema 600×600 mm porcelain tile (R10 wet-area slip, AS 4586)
Nero Mecca Care 32 mm T-bar grab rail + adjustable shower set (LHD Silver, AS 1428.1)
Midea 160 L heat-pump hot water system
TCL 2.4 kW reverse-cycle AC (inverter, ~6.0 TCSPF)
Arlec 9 W tri-colour LED downlights (3000K/4000K/5700K, IC-4)
Plumbing rough-in (cold + hot + waste), WaterMark certified throughout
Electrical wiring (3 GPO per room minimum, AS/NZS 3000)
Sewer connection to existing main (up to 10 m included)
Electrical cabling to switchboard (up to 15 m included)
0.2 mm polyethylene vapour barrier under slab (NCC 2022 Part 4.2.8)
Final inspection + occupancy certificate (Class 1a sign-off)
Defect liability period (per Master Builders HC 8 (2023) Clause 14)

What's NOT included — site-conditions variance

Per the signed Master Builders HC 8 (2023) building contract Clause 12. We disclose all variations in writing at the free site visit, before you commit.

Sewer/cabling beyond 10 m / 15 m allowance+$180 per linear metre

Hard-surface cut (concrete / pavers)+$200 per linear metre

Connection depth 1.5–2.0 m+$500 per connection

Connection depth 2.0–2.5 m+$500 per connection

Connection depth 2.5–3.0 m+$1,000 per connection

Excavation > 3.0 m deepSeparately quoted

Extra concrete (above 10 m³ slab allowance)+$800 per m³

Rock removal (if encountered)+$300 per m³

Coastal Hazard Overlay raised slab (Gold Coast / coastal NSW)+$8,000–$15,000

Brisbane City Council Infrastructure Charge+$8,000–$12,000 (BCC sites only)

Gold Coast Council Infrastructure Charge+~$15,000 (GCCC sites)

BAL-29+ bushfire upgrade (fire-rated materials)+$20,000–$40,000

How costs vary across the 4 cities

Melbourne

$110k–$200k + GST

Free (no Infrastructure Charge in most councils)

Class 1a Building Permit, 4–8 weeks. City of Casey, Wyndham, Brimbank fastest.

Brisbane

$110k–$200k + GST

+$8k–$12k BCC Infrastructure Charge

Code Assessable MCU via private certifier, 4–8 weeks. Logan/Ipswich faster than BCC.

Gold Coast

$110k–$200k + GST

+$15k GCCC IC; +$8k–$15k Coastal Hazard if applicable

Code Assessable MCU, 5–7 weeks. Coastal Hazard Overlay common.

Sydney

$110k–$200k + GST

No state-level IC; council DA fees if not SEPP path

10-day CDC under SEPP 2009 for lots ≥ 450 m². Cheapest total cost of the four cities.

How owners typically finance the build

Owner-occupied — ~20% cash deposit (~$32k–$52k including permits/connections), 80% via construction loan secured against the new building. Owner's existing main-house equity is the security buffer.
Investment property — same structure, but the new build's rent typically covers the new loan repayment from day one. Net positive monthly cash flow from first tenant.
SMSF — possible but adds complexity. Must comply with SISA s67A LRBA rules. Talk to a licensed financial adviser first; we refer to brokers experienced in granny-flat SMSF builds.
Joint family build — multi-generational households often use the granny flat for parents. Saves $60k+ per year vs aged-care facility fees. ROI is in saved aged-care fees + future rental optionality.
Refinance after handover — once the occupancy certificate is issued, lenders recognise the ~$180k–$340k property-value uplift. Many owners refinance to consolidate the construction loan into the main mortgage at standard rates, freeing up equity for the next investment.

Keep exploring

Design & order online Granny flat finance FAQ

Free Site Assessment

Start with a
30-minute site visit.

Tell us your address and which of the three plans you're drawn to. We'll review council overlays, confirm feasibility, and come back with a fixed-price quote, indicative rent and yield — all in writing, no obligation.

Sales & Feasibility

+61 480 099 909

hello@e2es.com.au

Office

Suite 631, Waterman Workspace, 44 Lakeview Drive, Scoresby VIC 3179

Granny flat cost in Australia 2026 —fixed price, no surprises.

Fixed price by plan (Melbourne / Brisbane / Gold Coast / Sydney)

What's included in the fixed price

What's NOT included — site-conditions variance

How costs vary across the 4 cities

How owners typically finance the build

Start with a30-minute site visit.

Granny flat cost in Australia 2026 —
fixed price, no surprises.

Start with a
30-minute site visit.