Home Extension Miranda — Design, Approval, Structural, Build
Full-service extensions in Miranda 2228: structural survey of existing 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore) home, design, Sutherland Shire Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Miranda costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Sutherland Shire Council approvals, and construction under one fixed-price contract.
Second-Storey & Rear Additions in Miranda
A home extension in Miranda comes with a tenant queue attached. As the Shire's largest retail centre, anchored by Westfield Miranda, the suburb draws a strong family-occupied rental pool, so every extra bedroom does double duty as space now and income later. The 1960s to 1990s fibro and brick-veneer stock runs on 550 to 800m² R2 blocks with room to spare for an addition.
Hawkesbury Sandstone is the line item to respect, with rock-cutting common in the dig, so we test before pricing groundwork. The fibro-era framing extends best at ground level and needs steel to go up, so out usually wins on these blocks, and R3 zoning along the station precinct adds density options on the right lot. The Kingsway and Miranda Park keep the pocket genuinely liveable.
What I would check first on your Miranda block: where the sandstone starts under a rear addition, the frame type, and whether an R3 precinct lot changes the options. Those decide both how it is built and what it costs.
We build these fixed-price, licence HBL 487805C. Ask us for a feasibility number built on a test dig.
Buildana manages the complete home extension process in Miranda — from design consultation and structural engineering through to DA or CDC approval, and fixed-price construction to handover. Extend your home without the stress.
Read our Home Extension Cost Guide 2026 or explore extension approval pathways in NSW.
- Home extensions in Miranda from $150K
- Sutherland Shire Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone bedrock — structural engineering included
- 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore)-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Miranda station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
A built-in tenant pool
As the Shire's largest retail centre, anchored by Westfield Miranda, the suburb draws a strong family-occupied rental pool, so every extra bedroom is space now and income later.
Those 550 to 800m² R2 blocks under the fibro and brick-veneer homes leave real room to build.
Respect the sandstone
Hawkesbury Sandstone means rock-cutting is common in the dig, so we test before pricing groundwork rather than guessing.
The fibro-era framing extends best at ground level and needs steel to go up, so out usually wins, and R3 zoning along the station precinct adds density options on the right lot.
Home extension builder in Miranda — key facts
- Suburb
- Miranda, NSW 2228
- Council / LGA
- Sutherland Shire Council (Sutherland Shire)
- Primary zoning
- R2 Low Density predominant
- Typical lot size
- 550–800m² typical; 600–1,000m² premium beachside/foreshore (Cronulla/Burraneer/Lilli Pilli/Yowie Bay/Caringbah South/Sylvania Waters); 700–2,000m² bushland-fringe (Bundeena, Maianbar, Bangor, Menai)
- Soil class
- Hawkesbury Sandstone bedrock
- Median house price
- $1.4M–$2.2M mid-tier; $1.8M–$3.8M foreshore; $2.5M–$6.0M+ Cronulla/Burraneer/Lilli Pilli/Caringbah South premium beachside
- Home era
- 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick
- Typical price range
- $150,000 – $600,000+
- Typical timeline
- 6–12 months design to handover
- Approval pathway
- CDC for most rear extensions, DA for second-storey
Want a real number for YOUR block — not a generic estimate?
Free site assessment, fixed-price contract, line-itemised quote within 48 hours. No high-pressure sales — just a real builder talking real numbers.
How It Works
From First Call to Final Key
The first job on an extension is finding out what you're extending onto. Miranda homes from the 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore) were built to different standards — we open walls, check footings, verify load paths. The existing house has to carry the new work.
⏱Design follows the existing roof. A bad extension looks like a bolt-on; a good one reads as original. Matched brickwork or contrasting render (whichever the architecture calls for), tied-in roofline, continuous flooring where it should be continuous.
⏱Construction happens while you live in the house. That means weatherproofing every night, staging the works so kitchens and bathrooms don't disappear on the same week, and keeping the site clean of debris that doesn't belong in a family home.
⏱Finish is seamless. Paint match, floor match, roofline match, brick match where possible. The only way to tell the extension is new is the date on the plans.
⏱Quality Promise
Miranda home extension specialists: we work on your home while you live in it, weatherproof the site nightly, finish clean.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $90,000 – $200,000 |
| Moderate extension (multiple openings, roof extended) | $200,000 – $380,000 |
| Complex extension (structural steel portals, re-roofing) | $380,000 – $600,000 |
| Second-storey tie-in (existing house re-engineered) | $350,000 – $650,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
Our Team
Oliver Alameri
Founder / Director / Builder · MPropDev · PhD Student
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
Estimate Your Build Cost
Use our free calculator to get an instant cost estimate for your project
Still got questions? Talk to Oliver directly.
30-min free call — bring your block, your brief, your budget. We'll map out feasibility, timeline, and realistic cost. No sales pitch.
Frequently Asked Questions
Buildana built our granny flat in just 12 weeks. Fast approvals, great communication, and a beautiful final product. Highly recommend.
Fatima Al-Rashid
Liverpool, NSW
We Build Across Sydney
Headquartered in Western Sydney's Fairfield. Active across all 28 metropolitan Sydney LGAs — from Penrith to the Eastern Suburbs, the Hills to the Sutherland Shire.
Last updated: 1 April 2026
Explore Related Topics
Start a Miranda Home Extension
Free design consultation for Miranda 2228. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in Miranda
Other Buildana services in Miranda
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Miranda 2228. Sutherland Shire Council regulations and local controls are covered on each page.