Home Extension West Pennant Hills — Design, Approval, Structural, Build
Full-service extensions in West Pennant Hills 2125: structural survey of existing 1970s–1990s home, design, The Hills Shire Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
HIA Member
MBA NSW0476 300 300Second-Storey & Rear Additions in West Pennant Hills
A home extension in West Pennant Hills grows the blue-gum belt home — 1970s-1990s stock on 700 to 1,200m² blocks where the wing uses the leafy room and the canopy is designed around, not through.
Tree controls are checked early, the bush-edge lots get the BAL assessment, and the shale junctions are engineered.
At the $2.2M to $3.5M+ median, the wing beats surrendering the forest setting and the catchments to move.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the canopy mapped, before you commit.
Buildana manages the complete home extension process in West Pennant Hills — 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 West Pennant Hills from $150K
- The Hills Shire Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1970s–1990s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Cherrybrook Metro (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The canopy stays in the plan
West Pennant Hills' forest setting is the premium — and the wing is designed around the significant trees, with the controls checked before the footprint is drawn.
The generous blocks leave real room once the canopy is mapped.
Edges and junctions handled
BAL ratings apply on the bushland boundaries, and the shale junctions are engineered where new footings meet the 1970s-1990s originals.
The tree work, the BAL materials and the engineering are all costed up front.
Home extension builder in West Pennant Hills — key facts
- Suburb
- West Pennant Hills, NSW 2125
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 700–1,200m²
- Soil class
- M
- Median house price
- $2.2M–$3.5M+
- Home era
- 1970s–1990s
- 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
We extend West Pennant Hills homes with a structural engineer on every job. Second storey, rear addition, multi-room — engineered and priced upfront.
How It Works
From First Call to Final Key
Walk through your West Pennant Hills 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 West Pennant Hills qualify for CDC — cleaner, faster, no neighbour notification. Second-storey additions typically need DA through The Hills Shire 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.
⏱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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Free design consultation for West Pennant Hills 2125. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in West Pennant Hills
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in West Pennant Hills 2125. The Hills Shire Council regulations and local controls are covered on each page.