Home Extension McMahons Point — Design, Approval, Structural, Build
Full-service extensions in McMahons Point 2060: structural survey of existing 1880s–1940s heritage home, design, North Sydney Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
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MBA NSW0476 300 300Quick Answer
A home extension in McMahons Point costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, North Sydney Council approvals, and construction under one fixed-price contract.
Second-Storey & Rear Additions in McMahons Point
A home extension in McMahons Point is harbour-village work, and the setting is unusual — 1880s to 1940s terraces and cottages on 200 to 450m² blocks, with the CBD skyline sitting right across the water. The addition is designed to the centimetre within the conservation areas, because there is no spare land and the streetscape is protected.
On the attached stock the party walls are assessed before anything ties in, the oldest fabric gets licensed lead and asbestos handling, and where the streets drop to the harbour the fall is engineered properly.
At a $3.2M to $6.5M median, the exact addition is what the village's standing rewards — you keep the wharf-and-ferry life and simply make the cottage work for a modern household.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the heritage position mapped, before you commit.
Buildana manages the complete home extension process in McMahons Point — 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 McMahons Point from $150K
- North Sydney Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1880s–1940s heritage-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near North Sydney (1 km), McMahons Point ferry station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Village precision
McMahons Point's terraces and cottages grow by precision — rear additions and level reworks designed to the centimetre within the HCAs, with the skyline outlook drawn in where the envelope allows.
The wharf-and-village lifestyle is exactly what building rather than moving preserves.
Oldest fabric, precise process
Party walls are assessed on the attached stock before anything ties into them.
Lead paint joins asbestos in the licensed processes, and the fall is engineered where the streets drop — all priced into the job from the outset.
Home extension builder in McMahons Point — key facts
- Suburb
- McMahons Point, NSW 2060
- Council / LGA
- North Sydney Council (North Sydney)
- Primary zoning
- R3 Medium
- Typical lot size
- 200–450m²
- Soil class
- M
- Median house price
- $3.2M–$6.5M
- Home era
- 1880s–1940s heritage
- 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) | $81,000 – $190,000 |
| Kitchen/living extension | $200,000 – $470,000 |
| Master suite + ensuite addition | $180,000 – $380,000 |
| Second storey (full or partial) | $380,000 – $740,000 |
| Multi-room ground floor wrap | $470,000 – $810,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Walk through your McMahons Point 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 McMahons Point qualify for CDC — cleaner, faster, no neighbour notification. Second-storey additions typically need DA through North Sydney 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
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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
McMahons Point Extension — Free Consultation
Free design consultation for McMahons Point 2060. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in McMahons Point
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in McMahons Point 2060. North Sydney Council regulations and local controls are covered on each page.