Home Extension Builder Longueville — Approved in 60 Days
Longueville 2066 extensions with tight approval timelines. CDC where eligible (~15 days), DA via Lane Cove Council in 40–60 days. Construction 12–24 weeks depending on scope.
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A home extension in Longueville costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Lane Cove Council approvals, and construction under one fixed-price contract.
Home Extension Builder in Longueville
Extension is the dominant scope in Longueville given heavy heritage controls. Federation mansion additions on harbour-fall sites — suspended slabs, structural underpinning, foreshore consent. Realistic budget $500K–$1.5M for premium 80–140m² addition. Pre-construction 7–9 months.
Practical realities of extending in Longueville: Nearest rail is Wollstonecraft (4 km, ferry), which influences site access during construction (deliveries, cranage, skip placement). 600–1,400m² blocks usually have enough room for proper site set-up, but tight battle-axe lots and narrow frontages need staging plans factored into the build program. Lane Cove Council processes a steady volume of residential applications — clean documentation moves fast, and Buildana lodges everything at full standard the first time. Class M (sandstone ridges) / H–E (river fall) soil (extremely reactive clay) sets foundation cost in the $45,000–$80,000 range; budget allocation for that line item is fixed in your contract, not estimated.
Buildana manages the complete home extension process in Longueville — 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 Longueville from $150K
- Lane Cove Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M (sandstone ridges) / H–E (river fall) soil — 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 Wollstonecraft (4 km, ferry) 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 Longueville?
Longueville is the harbour-fall peninsula on the north side of Tambourine Bay and Woodford Bay. Federation mansions, inter-war heritage and contemporary harbour-fall builds on 600–1,400m² blocks. Heritage Conservation Areas cover most streets. Sandstone-dominant with substantial fall to the water. Lane Cove River and Woodford Bay frontage. Premium for harbour outlook.
Longueville's established streetscape and median house prices of $3.5M–$7.5M reflect a premium location within Lane Cove. Building costs sit above the metro average, offset by stronger capital growth and rental returns. Transport access via Wollstonecraft (4 km, ferry) connects Longueville to the wider Sydney network. 1880s–1940s heritage-era homes in Longueville 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 ridges) / H–E (river fall)) across Longueville are well understood by local builders — Buildana's engineering accounts for extremely reactive soil movement.
Extensions are the dominant scope across the heritage harbour-fall peninsulas (Greenwich, Longueville, Northwood, Linley Point) where KDR is restricted. Federation mansion additions, sandstone terrace reconfiguration, river-fall heritage-grade work all common. Suspended slab engineering on river-fall sites; bushfire BAL upgrades on Lane Cove West and Riverview bush-edge lots. Heritage Council expects retention of stained glass, ornate plasterwork, marble fireplaces, slate roofing on protected streets. Realistic budget $400K–$1.4M for thoughtful 60–130m² addition; $700K–$2M for premium harbour-fall heritage-grade work.
Planning Controls — Lane Cove Council
Lane Cove LEP 2009 & Lane Cove DCP 2010. R2 Low Density dominates the LGA: FSR 0.5:1, building height 9.5m, front setback 7.5–9m varying by streetscape, landscaped area 35–40%. R3 Medium Density along Burns Bay Road, Longueville Road and the Lane Cove village core permits FSR up to 0.8:1. R4 High Density and B4 Mixed Use along the St Leonards / Crows Nest fringe in Lane Cove North. The 2024 Crows Nest Metro SEPP TOD precinct overlay reaches the south-eastern portion of Lane Cove North, opening density bonuses inside 400m of Crows Nest Metro station. Heritage Conservation Areas cover most older streets in Greenwich, Longueville, Northwood, Linley Point, Lane Cove West, Riverview and parts of Lane Cove village. Tree Preservation Order applies LGA-wide. River-fall and harbour-fall sites on the Lane Cove River and Sydney Harbour peninsulas (Greenwich, Longueville, Northwood, Linley Point) require engineered slab and retaining design — sandstone rock excavation $20K–$60K standard. Lane Cove National Park frontage on Lane Cove West and Riverview adds bushfire BAL ratings on bush-edge lots.
Home extension builder in Longueville — key facts
- Suburb
- Longueville, NSW 2066
- Council / LGA
- Lane Cove Council (Lane Cove)
- Primary zoning
- R2 Low Density / R3 Medium (Lane Cove village)
- Typical lot size
- 600–1,400m²
- Soil class
- Class M (sandstone ridges) / H–E (river fall)
- Median house price
- $3.5M–$7.5M
- 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
Building in Longueville — Local Context
Longueville Block Realities
Typical Longueville blocks are 600–1,400m² on Class M (sandstone ridges) / H–E (river fall) ground (extremely reactive clay). For a extension, the structural envelope is more constrained than the headline lot size suggests — once you subtract setbacks, easements, landscaped area requirements, and any tree preservation, the actual buildable area is usually 35-45% of the block. We map that early in the feasibility stage so you're designing to what's actually allowed, not what looks possible from the title plan. Foundation cost band on most Longueville blocks: $45,000–$80,000.
Lane Cove Planning Context
Lane Cove has its own LEP and DCP layered over State planning controls. For extending in Longueville, the practical impact: Lane Cove Council's DCP sets local rules for streetscape character, materials palette in some precincts, vehicle crossover widths, and tree retention. R2 Low Density / R3 Medium (Lane Cove village) zoning on most Longueville blocks permits single dwellings, alterations, and additions. Buildana checks every overlay (heritage, bushfire, flood, acid sulfate soil, biodiversity) before quoting.
What a Extension Costs in Longueville
Longueville's median house price sits at $3.5M–$7.5M. That's the number that decides whether a home extension stacks up financially. If you're spending more than 50% of $3.5M–$7.5M on a extension, the economics tilt toward knockdown rebuild instead. Worth running the numbers properly before locking in scope. Buildana provides itemised quotes — no provisional sums, no allowances, no "as per engineering" line items.
Longueville Housing Stock & What That Means
Most homes in Longueville were built 1880s–1940s heritage. That puts asbestos risk firmly in play — sheeting, eaves linings, vinyl floor tiles, and pipe lagging are likely. Licensed removal adds $5,000–$25,000 to a extension where demolition is involved, and Buildana manages SafeWork NSW notifications, removal, and clearance certificates as part of the contract. Existing structures from 1880s–1940s heritage usually need wiring, plumbing, and insulation upgrades to meet NCC 2025 — worth costing that into the extension scope upfront, not as a variation later.
Building Activity in Longueville Right Now
Longueville 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 Longueville
Matching brick on a Longueville extension: 1880s–1940s heritage brick is often discontinued. We specify a close-match or deliberately contrast with render or cladding so the extension reads as intentional, not as a failed match. Done well, an intentional contrast looks better than a forced match.
Extension or move? In Longueville, the maths usually favours extension once you factor in stamp duty ($40K–$60K), agent fees ($25K–$40K), and moving costs. An extension of $200K–$350K often delivers the space without the 12-week disruption of moving.
Longueville vs Nearby Suburbs
Longueville vs nearby suburbs — key metrics for extending.
| Suburb | Median Price | Typical Lot | Soil Class | Era | Station |
|---|---|---|---|---|---|
| Longueville2066this suburb | $3.5M–$7.5M | 600–1,400m² | Class M (sandstone ridges) / H–E (river fall) | 1880s–1940s heritage | Wollstonecraft (4 km, ferry) |
| Lane Cove2066 | $2.4M–$4.0M | 400–700m² | Class M (sandstone ridges) / H–E (river fall) | 1900s–1960s + apartments | St Leonards (2.5 km) |
| Northwood2066 | $4.0M–$8.0M | 600–1,400m² | Class M (sandstone ridges) / H–E (river fall) | 1880s–1940s heritage | Wollstonecraft (3 km, ferry from Longueville) |
| Riverview2066 | $3.0M–$5.5M | 500–1,200m² | Class M (sandstone ridges) / H–E (river fall) | 1900s–1950s | Wollstonecraft (3 km) |
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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Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $115,000 – $260,000 |
| Moderate extension (multiple openings, roof extended) | $260,000 – $490,000 |
| Complex extension (structural steel portals, re-roofing) | $490,000 – $770,000 |
| Second-storey tie-in (existing house re-engineered) | $450,000 – $830,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
The first job on an extension is finding out what you're extending onto. Longueville homes from the 1880s–1940s heritage were built to different standards — we open walls, check footings, verify load paths. The existing house has to carry the new work.
⏱Design follows the existing roof. A bad extension looks like a bolt-on; a good one reads as original. Matched brickwork or contrasting render (whichever the architecture calls for), tied-in roofline, continuous flooring where it should be continuous.
⏱Construction happens while you live in the house. That means weatherproofing every night, staging the works so kitchens and bathrooms don't disappear on the same week, and keeping the site clean of debris that doesn't belong in a family home.
⏱Finish is seamless. Paint match, floor match, roofline match, brick match where possible. The only way to tell the extension is new is the date on the plans.
⏱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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