Kingsgrove Home Extension Builder — Live In, Build On
Buildana extends homes across Kingsgrove 2208 while you stay in place. 1920s–1960s heritage Federation/Californian Bungalow + 1960s–1990s brick veneer + 2010s+ R3/R4 redevelopment around Hurstville/Kogarah/Beverly Hills CBDs-era structure, Georges River Council rules, weatherproofing during build — all managed locally from Fairfield.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Kingsgrove costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Georges River Council approvals, and construction under one fixed-price contract.
Kingsgrove Home Extensions & Additions
A home extension in Kingsgrove hinges on two reads: the era of the house and the ground under it. The Federation and Bungalow homes extend character-behind while the later brick moves freely, but pockets here sit on reactive clay, so the junctions between old and new get engineered rather than assumed — that is where lazy extensions crack.
On the Kingsgrove Road R3 I check the zoning before a big spend, and the pre-war fabric has its lead paint and asbestos processed under licence where we open it.
At a $1.5M to $2.4M median the wing beats the friction of upsizing inside the district, and the station keeps the finished home in demand.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the zoning checked, before you commit.
Buildana manages the complete home extension process in Kingsgrove — 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 Kingsgrove from $150K
- Georges River Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1920s–1960s heritage Federation/Californian Bungalow + 1960s–1990s brick veneer + 2010s+ R3/R4 redevelopment around Hurstville/Kogarah/Beverly Hills CBDs-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Kingsgrove station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Read the era, then the clay
The heritage streets extend character-behind and the later brick moves freely, but the reactive pockets decide the detailing — the junction of old slab to new is engineered for the movement.
On the Kingsgrove Road R3 the redevelopment value gets weighed before any big wing.
Fabric and ground handled
Lead paint comes out with the asbestos on anything pre-war, both under licence.
The reactive junctions are engineered, and the whole lot is costed in the quote from the outset.
Home extension builder in Kingsgrove — key facts
- Suburb
- Kingsgrove, NSW 2208
- Council / LGA
- Georges River Council (Georges River Council)
- Primary zoning
- R2 Low Density
- Typical lot size
- 400–700m² typical (Hurstville/Kogarah/Beverly Hills/Penshurst/Mortdale/Carlton/Kingsgrove/Allawah); 600–1,200m² premium foreshore (Oatley/Lugarno/Peakhurst Heights/Connells Point)
- Soil class
- M
- Median house price
- $1.5M–$2.4M typical; $2.0M–$3.5M Oatley/Lugarno/Peakhurst Heights premium foreshore; $3.0M–$8.0M+ direct waterfront
- Home era
- 1920s–1960s heritage Federation/Californian Bungalow + 1960s–1990s brick veneer + 2010s+ R3/R4 redevelopment around Hurstville/Kogarah/Beverly Hills CBDs
- 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
Walk through your Kingsgrove home with our designer and structural engineer. We measure, photograph, and check the bones — footings, frame condition, roof structure. The cost estimate that follows is grounded in what we found, not a generic per-m² number.
⏱Our designer works with your existing home's layout — connecting new living areas to existing rooms, matching materials and roof pitch, and maximising natural light. You approve floor plans and 3D renders before we proceed.
⏱Most rear extensions in Kingsgrove qualify for CDC — cleaner, faster, no neighbour notification. Second-storey additions typically need DA through Georges River Council because of overshadowing and privacy assessments. We choose based on your design, not on what's easier to lodge.
⏱Extension built from new footings to completion — connecting structurally to your existing home. Class M soil design managed. Temporary weatherproofing maintains liveability where possible.
⏱Walk through the completed extension, confirm finishes, collect your OC. Six-year structural warranty covers all new work including the junction with your existing home. Maintenance guide provided.
⏱Quality Promise
We extend Kingsgrove homes with a structural engineer on every job. Second storey, rear addition, multi-room — engineered and priced upfront.
Cost Guide
| Item | Estimated Range |
|---|---|
| Single-room addition (bedroom/study) | $57,000 – $130,000 |
| Kitchen/living extension | $140,000 – $330,000 |
| Master suite + ensuite addition | $120,000 – $270,000 |
| Second storey (full or partial) | $270,000 – $520,000 |
| Multi-room ground floor wrap | $330,000 – $570,000 |
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
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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
Start a Kingsgrove Home Extension
Free design consultation for Kingsgrove 2208. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Kingsgrove
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Kingsgrove 2208. Georges River Council regulations and local controls are covered on each page.