Licensed Home Extension Builder Cremorne Point
NSW licensed extension specialist. Cremorne Point 2090 extensions on 1900s–1940s heritage + 1960s+ apartments-era homes require structural sign-off, Class M (sandstone) / H–E (harbour fall) footings, and matched connection — we engineer and document properly.
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A home extension in Cremorne 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 Cremorne Point
Extension in Cremorne Point is the dominant scope given heritage controls and harbour-fall sites that rule out KDR and duplex. Federation mansion additions, harbourside reconfiguration, second-storey heritage-grade work all common. Suspended slab engineering, rock anchoring, harbour-view setback negotiation drive cost. Realistic budget $600K–$1.5M for a premium 80–150m² addition. Pre-construction 6–9 months.
Most Cremorne Point blocks run 350–700m² on Class M (sandstone) / H–E (harbour fall) ground. Extension feasibility depends on what's underneath the existing slab and whether the frame can carry a second-storey load — Buildana checks both before quoting, so what's in the contract is what gets built. Median price band: $3.5M–$8.0M. Nearest rail is North Sydney (4 km, ferry to Circular Quay).
Buildana manages the complete home extension process in Cremorne 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 Cremorne Point from $150K
- North Sydney Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M (sandstone) / H–E (harbour fall) soil — structural engineering included
- 1900s–1940s heritage + 1960s+ apartments-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near North Sydney (4 km, ferry to Circular Quay) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Why Extend Your Home in Cremorne Point?
Cremorne Point is the harbourside peninsula extending into Sydney Harbour between Mosman Bay and Shell Cove. Premium residential — Federation mansions, inter-war flats and harbourside apartments on 350–700m² blocks with substantial fall to the water. Sandstone-dominant soil; engineered slabs and substantial retaining standard. Heritage controls heavy. Cremorne Point ferry wharf, no train.
Cremorne Point's established streetscape and median house prices of $3.5M–$8.0M reflect a premium location within North Sydney. Building costs sit above the metro average, offset by stronger capital growth and rental returns. Transport access via North Sydney (4 km, ferry to Circular Quay) connects Cremorne Point to the wider Sydney network. 1900s–1940s heritage + 1960s+ apartments-era homes in Cremorne Point often have good structural foundations worth building on. Extensions add living space at a fraction of the full rebuild cost. Ground conditions (Class M (sandstone) / H–E (harbour fall)) across Cremorne Point are well understood by local builders — Buildana's engineering accounts for extremely reactive soil movement.
Extensions in North Sydney are mostly heritage-sensitive — Federation and inter-war terraces, cottages and harbourside mansions in Kirribilli, Lavender Bay, McMahons Point, Milsons Point, Cammeray, Neutral Bay, Waverton, Wollstonecraft and Cremorne. Council expects retention of heritage detail (stone walls, leadlight, slate roofs, decorative plasterwork) on character work. Second-storey additions on harbour-fall lots are engineering-intensive — suspended slabs, structural underpinning, harbour-view setback negotiation. Crows Nest Metro 2024 SEPP affects the Crows Nest extension scene with redevelopment pressure. Realistic budget $400K–$1.2M for a thoughtful 60–120m² heritage-grade addition; $300K–$700K for simpler post-war stock outside heritage zones.
Planning Controls — North Sydney Council
North Sydney LEP 2013 & North Sydney DCP 2013. R3 Medium Density dominates much of the LGA: FSR up to 0.85:1, building height 8.5–12m varying by precinct. R4 High Density along the North Sydney CBD edge and the Victoria Cross Metro 2024 SEPP precinct permits substantially higher FSR and height. B3/B4 mixed-use zones along Pacific Highway, Miller Street and Military Road. R2 pockets exist in Cammeray, Cremorne, Neutral Bay and parts of Waverton/Wollstonecraft with FSR 0.5:1 and minimum 9m frontage. Heritage Conservation Areas cover virtually all of Kirribilli, Lavender Bay, McMahons Point and Milsons Point, plus pockets of Cammeray, Neutral Bay, North Sydney, Waverton, Wollstonecraft and Cremorne. Tree Preservation Order applies LGA-wide. The 2024 Victoria Cross Metro SEPP TOD precinct opens density bonuses inside 400m of Victoria Cross Metro station — major redevelopment opportunity in central North Sydney. Crows Nest Metro 2024 SEPP also affects the Crows Nest portion of the LGA. Substantial harbour-fall sites on Kirribilli, Milsons Point, McMahons Point, Lavender Bay, Waverton, Cremorne Point and Kurraba Point require engineered slab and retaining design.
Home extension builder in Cremorne Point — key facts
- Suburb
- Cremorne Point, NSW 2090
- Council / LGA
- North Sydney Council (North Sydney)
- Primary zoning
- R3 Medium / R4 / B4 mixed
- Typical lot size
- 350–700m²
- Soil class
- Class M (sandstone) / H–E (harbour fall)
- Median house price
- $3.5M–$8.0M
- Home era
- 1900s–1940s heritage + 1960s+ apartments
- 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
Building in Cremorne Point — Local Context
Site & Ground Conditions in Cremorne Point
Cremorne Point sits on Class M (sandstone) / H–E (harbour fall) soil — extremely reactive clay. For a home extension, that rules out the cheapest off-the-shelf slab designs straight away. and pushes engineered footings into the $45,000–$80,000 range on most 350–700m² blocks here. Geotechnical testing isn't optional — every Buildana extension in Cremorne Point starts with a borehole report so the slab and footings are sized to your actual block, not a generic spec. Skipping that step is how you end up with cracked cornices and sticking doors three years in. Drainage design matters too — overland flow paths on Cremorne Point's topography can collect water against rear setbacks if the contour survey is sloppy.
Planning Controls in Cremorne Point
Cremorne Point is zoned R3 Medium / R4 / B4 mixed with R3 Medium Density pockets. North Sydney Council controls FSR, height limits (typically 8.5–9m), site coverage, landscaped area minimums, and setbacks. For a extension, the binding constraints on most 350–700m² blocks here are: front setback (around 4.5–6m), side setbacks (1.0–1.5m articulated), rear (3–6m depending on lot depth), and landscaped area (usually 35–40%). Buildana's design team works to those numbers from the first sketch — no late re-design when council comes back with comments.
Cost vs Value in Cremorne Point
Median sale price in Cremorne Point is $3.5M–$8.0M. For a extension, the decision tree runs through three numbers: build cost, expected post-completion value, and how long you plan to hold. Ground-floor extensions of 30–50m² typically return 1.1–1.3× their cost at sale in suburbs around $3.5M–$8.0M. Second-storey adds tend to outperform — 1.3–1.6× — because they unlock larger family layouts on standard blocks. We map this in feasibility before you commit.
Designing for the Cremorne Point Streetscape
Cremorne Point's housing stock is predominantly from the 1900s–1940s heritage + 1960s+ apartments. North Sydney (4 km, ferry to Circular Quay) from the nearest station. The local anchor is Cremorne Point Reserve & Robertsons Point lighthouse. For a home extension, the streetscape question matters more than most builders admit — a brand-new double-storey on a street of single-storey 1900s–1940s heritage + 1960s+ apartments weatherboards will draw council attention on bulk and scale, even if technically compliant. Buildana designs the front elevation to read appropriately for the street while modernising the floor plan and structure behind it. Materials palette, roof pitch, fenestration rhythm — all chosen to settle into the existing rhythm rather than fight it.
Building Activity in Cremorne Point Right Now
Cremorne Point is seeing steady residential activity — extensions are picking up as families choose to upsize their existing home rather than face stamp duty on a move. Buildana sits inside that pipeline — we know what's getting approved, what's stalling, and why.
Builder's Take on Cremorne Point
BASIX re-certification on extensions catches people out. Any extension over 50m² triggers BASIX on the combined envelope. Your existing home might be well short of 7-star, so the extension has to pull the whole house closer to compliance. That can mean insulation upgrades in the existing walls and ceiling.
The cost-per-square-metre on an extension is almost always higher than new build — roughly $3,800–$5,500/m² vs $3,200–$4,500/m² for new. Reason: connecting new to old adds engineering, matching adds material cost, working around occupation adds time. Budget accordingly.
Cremorne Point vs Nearby Suburbs
Cremorne Point vs nearby suburbs — key metrics for extending.
| Suburb | Median Price | Typical Lot | Soil Class | Era | Station |
|---|---|---|---|---|---|
| Cremorne Point2090this suburb | $3.5M–$8.0M | 350–700m² | Class M (sandstone) / H–E (harbour fall) | 1900s–1940s heritage + 1960s+ apartments | North Sydney (4 km, ferry to Circular Quay) |
| Cremorne2090 | $2.5M–$4.0M | 350–600m² | Class M (sandstone ridges) / H to E (harbour fall) | 1900s–1960s detached + apartments 1960s+ | North Sydney (3 km) |
| Kurraba Point2089 | $3.2M–$6.5M | 300–600m² | Class M (sandstone) / H–E (harbour fall) | 1900s–1940s + 1960s+ apartments | North Sydney (3 km, ferry to Circular Quay) |
| Mosman2088 | $4.5M–$8.0M | 500–1,000m² | Class M (sandstone ridges) / H to E (harbour fall) | 1880s–1940s heritage | North Sydney (4 km, ferry from Mosman Bay) |
Median price, soil class, and lot size shape build feasibility and final cost. Buildana assesses every site against these and other constraints during the free feasibility stage.
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How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. We assess your Cremorne Point home — existing structure, block size (350–700m²), R3 Medium / R4 / B4 mixed 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 Cremorne Point home's streetscape. Multiple design options presented.
⏱The Cremorne Point construction phase. Fixed price, programmed, supervised. Documentation pack covers structural engineering for the new footings sized to match existing depths on Class M (sandstone) / H–E (harbour fall) 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 (sandstone) / H–E (harbour fall) 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.
⏱Quality Promise
Buildana's Cremorne Point home extension process: assess the existing structure, design the addition, approve, build. Fixed price throughout.
Cost Guide
| Item | Estimated Range |
|---|---|
| Small rear extension (up to 30m²) | $119,000 – $240,000 |
| Medium rear/side extension (30–60m²) | $240,000 – $420,000 |
| Large ground-floor extension (60–100m²) | $420,000 – $660,000 |
| Second-storey addition (60–120m²) | $370,000 – $730,000 |
| Wrap-around (ground + 1st floor) | $660,000+ |
| Structural engineering & tie-in | Included |
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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Liverpool, NSW
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Last updated: 1 April 2026
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