Home Extension Builder Horningsea Park — From $150K Fixed Price
Fixed-price home extensions in Horningsea Park 2171. Rear extension $150K–$300K, second storey $300K–$500K. Liverpool City Council approvals managed. Free site consult.
HIA Member
MBA NSW0476 300 300Second-Storey & Rear Additions in Horningsea Park
A home extension in Horningsea Park grows the 2000s home hitting its outgrown point — the estate's earliest stock now holds bigger households than the plans anticipated, and the rear addition solves it.
The 400 to 550m² blocks demand tight design, the clean fabric keeps the work simple, and the Class H junctions are engineered.
At the $900K to $1.1M median, the wing beats upsizing where the plan is genuinely outgrown.
We build these fixed-price, licence HBL 487805C. Ask us to measure what your block can hold.
Buildana manages the complete home extension process in Horningsea Park — 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 Horningsea Park from $150K
- Liverpool City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class H soil — structural engineering included
- 2000s–present-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Liverpool (5 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The outgrown 2000s plan
Horningsea Park's 2000s homes now hold households their plans never anticipated — and the rear addition adds the bedrooms and living the family needs, designed tight to the 400 to 550m² blocks.
The clean fabric drives the budget into the new space, not into fixing the old.
The Class H junction
The Class H ground is reactive, so the footing tie is engineered and the new wing moves with the existing home.
The junction is engineered as a line item in the scope.
Home extension builder in Horningsea Park — key facts
- Suburb
- Horningsea Park, NSW 2171
- Council / LGA
- Liverpool City Council (Liverpool City)
- Primary zoning
- R2 Low Density
- Typical lot size
- 400–550m²
- Soil class
- Class H
- Median house price
- $900K–$1.1M
- Home era
- 2000s–present
- 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.
Quality Promise
Our Horningsea Park home extensions connect old-to-new cleanly. Matched brickwork, tied roofline, no awkward transitions.
How It Works
From First Call to Final Key
We assess your Horningsea Park home — existing structure, block size (400–550m²), R2 Low Density zoning, setbacks, FSR, and your space requirements. You'll know what's achievable before spending on detailed design.
⏱Design phase covers the extension layout, junction with existing structure, window and door placement, and external finish to match your Horningsea Park home's streetscape. Multiple design options presented.
⏱Documentation pack covers structural engineering for the new footings sized to match existing depths on Class H soil, BASIX 2025 compliance, shadow diagrams to neighbours' POS, hydraulic, and detailed sections through the wall-tie junction. Approval-grade, not concept-grade.
⏱Fixed-price construction of your extension. New footings engineered for Class H soil, structural connection to existing home, frame, fit-out, and finishes. Weekly updates from your project manager.
⏱Handover documentation covers the new work specifically — OC for the extension, structural certs, BASIX certificate updates, and warranty for the new section plus the junction detailing. Existing house remains under whatever warranty position applied before.
⏱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
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Start a Horningsea Park Home Extension
Free design consultation for Horningsea Park 2171. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Horningsea Park
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Horningsea Park 2171. Liverpool City Council regulations and local controls are covered on each page.