5 Star Granny Flats
2026 guide

How much does a granny flat cost in Sydney?

Build an indicative estimate for your design, size, finishes and extras, then see what it could return in rent.

The Fairlawn granny flat
Overview

How much does a granny flat cost in Sydney?

Build an indicative estimate for your design, size, finishes and extras, then see what it could return in rent. Free, instant and no obligation.

1 What type of granny flat do you want?

Select the design that suits your property and lifestyle.

2 What size are you considering?

NSW SEPP (Housing) 2021 allows secondary dwellings up to 60m² of habitable floor area.

3 What level of finishes are you after?

Finish quality affects both build cost and achievable weekly rent.

Included as standard across all builds
  • Daikin split system air conditioning
  • Floor to ceiling tiles in bathroom
  • 6 year structural warranty

4 Any extras to include?

Select any additional features. These are added to your base estimate.

Your estimated results

Based on your selections and Sydney average market figures

Build cost est.$172,000 – $195,000Indicative, for a 2 bedroom with mid-range finishes
Weekly rent est.$480 – $590Sydney average for this design type Ref [5] [7]
Annual income$27,820Based on 52 weeks fully tenanted. Vacancy rates in Greater Sydney remained below 2% throughout 2024–25. Ref [1]
Gross yield on cost15.4%Return on build cost. Granny flats in key Sydney suburbs achieve 7–10%+ gross yields. Ref [2]
Break-even6.5 yrsYears to recover build cost from rental income only, excluding capital uplift.
Est. property value uplift$150,000 – $250,000A compliant granny flat typically adds $150,000–$250,000 to a Sydney property’s market value. Ref [3] [4]
Check my block first

Our team will review your selections and contact you within one business day with a tailored estimate. Figures are estimates only, see the disclaimer below.

Data sources and references

Where these figures come from

  1. Sydney vacancy rates below 2%. Source: Sydney Home Renovation Guide (2026).
  2. Gross yields 7–10%+. Source: In House Granny Flat (2025).
  3. Value uplift $150k–$250k. Source: Buildana (2026).
  4. Source: Sydney Home Renovation Guide (2026).
  5. Two-bedroom Sydney granny flats rent $350–$600/week. Source: Fundd 2025 Granny Flat Guide.
  6. Build cost estimates. Source: Buildana (2026).
  7. Rental data by suburb. Source: Domain / SQM Research Q4 2025, compiled Q1 2026.
Important disclaimer

All figures produced by this calculator are estimates only and do not constitute financial advice, investment advice, or a formal building quote.

Build cost estimates are based on published market ranges for compliant secondary dwellings in Greater Sydney as at Q1 2026. Actual costs vary based on site conditions, slope, soil type, services connection, and council requirements.

Rental income figures are indicative weekly median asking rents from Domain / SQM Research Q4 2025. Vacancy, management fees, maintenance, and holding costs are not included. 5 Star Granny Flats recommends obtaining a formal fixed-price quote, independent property valuation, and independent financial advice before making any investment decision. Figures reflect market conditions as at Q1 2026.

Indicative starting prices only; final pricing is always confirmed with a free, no-obligation site quote.

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Visit our display home to experience the quality for yourself, touch the finishes, test the materials, and explore the full range of design options available to you. You'll speak directly with our experienced granny flat designers and visualise what your own space could look like.

📍 2 Mary St, Blacktown NSW 2148

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