Home Extension Builder Old Guildford — Approved in 60 Days
Old Guildford 2161 extensions with tight approval timelines. CDC where eligible (~15 days), DA via Fairfield City Council in 40–60 days. Construction 12–24 weeks depending on scope.
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A home extension in Old Guildford costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Fairfield City Council approvals, and construction under one fixed-price contract.
Home Extension Builder in Old Guildford
A home extension in Old Guildford works the quiet pocket between two centres — post-war homes on standard blocks with the rear depth for the family addition, and both Fairfield and Guildford minutes away.
The era read leads: the post-war fibro gets the licensed strip-out where touched, brick extends cleanly, and out beats up on the lighter framing.
At the $900K to $1.15M median, extending keeps the pocket's quiet and the household's networks.
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 Old Guildford — 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 Old Guildford from $150K
- Fairfield City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M–H soil — structural engineering included
- 1960s–1980s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Yennora (1 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The quiet pocket grows
Old Guildford's quiet streets between Fairfield and Guildford are worth keeping — and the rear wing lets the household grow without leaving them.
The standard blocks take the addition with the plan worked properly.
Era handled properly
The post-war fibro gets licensed strip-out where touched, brick extends cleanly, and the footings are engineered to the ground.
The strip-out and the engineered footings both sit in the quote up front.
Home extension builder in Old Guildford — key facts
- Suburb
- Old Guildford, NSW 2161
- Council / LGA
- Fairfield City Council (Fairfield City)
- Primary zoning
- R2 Low Density
- Typical lot size
- 450–700m²
- Soil class
- Class M–H
- Median house price
- $900K–$1.15M
- Home era
- 1960s–1980s
- 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 |
|---|---|
| Small rear extension (up to 30m²) | $86,000 – $170,000 |
| Medium rear/side extension (30–60m²) | $170,000 – $300,000 |
| Large ground-floor extension (60–100m²) | $300,000 – $480,000 |
| Second-storey addition (60–120m²) | $270,000 – $520,000 |
| Wrap-around (ground + 1st floor) | $480,000+ |
| Structural engineering & tie-in | Included |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. We assess your Old Guildford home — existing structure, block size (450–700m²), 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 Old Guildford home's streetscape. Multiple design options presented.
⏱The Old Guildford construction phase. Fixed price, programmed, supervised. Documentation pack covers structural engineering for the new footings sized to match existing depths on Class M–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 M–H soil, structural connection to existing home, frame, fit-out, and finishes. Weekly updates from your project manager.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. 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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Other Buildana services in Old Guildford
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Old Guildford 2161. Fairfield City Council regulations and local controls are covered on each page.