Licensed Home Extension Builder Riverstone
NSW licensed extension specialist. Riverstone 2765 extensions on Mixed-era homes require structural sign-off, Class M–H footings, and matched connection — we engineer and document properly.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Riverstone costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Blacktown City Council approvals, and construction under one fixed-price contract.
Second-Storey & Rear Additions in Riverstone
A home extension in Riverstone splits along the same line the suburb itself does. The heritage homes around the old town centre extend the traditional way — character kept out front, the new living built behind where the street never sees it. The new-release stock on the growth edges is mostly too young to need any of that yet.
On the older homes the era fabric gets licensed handling, and any heritage considerations are checked early so the approval runs clean rather than stalling. The growth building up around the suburb lifts the value of every established result along the way.
At an $800K to $1.05M median the staying maths works where the home genuinely deserves the wing. I will tell you honestly which side of Riverstone your house sits on before anything gets drawn.
We build these fixed-price, licence HBL 487805C. Tell me about the property and I will give you the honest read.
Buildana manages the complete home extension process in Riverstone — 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 Riverstone from $150K
- Blacktown City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M–H soil — structural engineering included
- Mixed-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Riverstone station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The heritage side grows
Riverstone's town-centre homes extend the right way — the character stays at the front and the new living is built behind — while the surrounding growth lifts the value of everything established.
The release stock rarely needs extending yet, and I say so rather than scope work it does not need.
Old fabric, checked early
The era fabric gets licensed handling wherever the work opens it up, and any heritage position is checked before design so the approval runs clean.
All of that is inside the fixed price from the outset.
Home extension builder in Riverstone — key facts
- Suburb
- Riverstone, NSW 2765
- Council / LGA
- Blacktown City Council (Blacktown City)
- Primary zoning
- R2 Low Density
- Typical lot size
- 300–600m²
- Soil class
- Class M–H
- Median house price
- $800K–$1.05M
- Home era
- Mixed
- 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.
Cost Guide
| Item | Estimated Range |
|---|---|
| Single-room addition (bedroom/study) | $56,000 – $130,000 |
| Kitchen/living extension | $140,000 – $330,000 |
| Master suite + ensuite addition | $120,000 – $260,000 |
| Second storey (full or partial) | $260,000 – $510,000 |
| Multi-room ground floor wrap | $330,000 – $560,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
On-site assessment of your Mixed-era home in Riverstone. We check structural condition, block dimensions (300–600m²), setback availability, and Blacktown City Council's DCP requirements. Written feasibility and cost estimate provided.
⏱Designing an extension is half about the new space and half about how it joins the old one. Doorway position, ceiling height transition, floor level matching, light wells — the junction makes or breaks how the finished home feels.
⏱We lodge your extension approval — CDC for eligible designs or DA through Blacktown City Council. Full documentation including structural engineering for Class M–H soil, BASIX, and shadow diagrams. CC issued before works start.
⏱For ground-floor rear extensions you usually stay in the house during the build, with temporary weatherproofing at the junction wall until the new section is locked up. Second-storey additions need a 4–8 week relocation during the roof-off and frame-up phase.
⏱Final inspection, Occupation Certificate, 6-year structural warranty. Your Riverstone home now has the space your family needs.
⏱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
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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
Extend Your Home in Riverstone
Free design consultation for Riverstone 2765. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Riverstone
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Riverstone 2765. Blacktown City Council regulations and local controls are covered on each page.