Home Extension Builder Lane Cove — Approved in 60 Days
Lane Cove 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.
HIA Member
MBA NSW0476 300 300Second-Storey & Rear Additions in Lane Cove
Extension in Lane Cove village works mid-tier additions on Federation cottages and inter-war stock. Heritage Conservation Areas require character retention on protected streets. Apartment renovations the other major category. Realistic budget $300K–$800K for 60–130m² addition; $180K–$400K apartment-scale.
Practical realities of extending in Lane Cove: Nearest rail is St Leonards (2.5 km), which influences site access during construction (deliveries, cranage, skip placement). 400–700m² 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 Lane Cove — 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 Lane Cove 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
- 1900s–1960s + apartments-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near St Leonards (2.5 km) 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 Lane Cove?
Lane Cove is the village core of the LGA — Burns Bay Road and Longueville Road shopping spines, mixed-use B4 along the high street, R3 medium-density apartments through the village, R2 detached on side streets. Federation cottages, inter-war flats and 1960s–2000s apartments on 400–700m² blocks. Heritage Conservation Areas cover several side streets. Sandstone soil on the ridge.
Lane Cove's established streetscape and median house prices of $2.4M–$4.0M 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 St Leonards (2.5 km) connects Lane Cove to the wider Sydney network. 1900s–1960s + apartments-era homes in Lane Cove often have good structural foundations worth building on. Extensions add living space at a fraction of the full rebuild cost. Class M (sandstone ridges) / H–E (river fall) soil (extremely reactive) is standard for Lane Cove — Buildana includes engineered slab design in every quote.
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 Lane Cove — key facts
- Suburb
- Lane Cove, NSW 2066
- Council / LGA
- Lane Cove Council (Lane Cove)
- Primary zoning
- R3 / B4 mixed
- Typical lot size
- 400–700m²
- Soil class
- Class M (sandstone ridges) / H–E (river fall)
- Median house price
- $2.4M–$4.0M
- Home era
- 1900s–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 Lane Cove — Local Context
Site & Ground Conditions in Lane Cove
Lane Cove sits on Class M (sandstone ridges) / H–E (river 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 400–700m² blocks here. Geotechnical testing isn't optional — every Buildana extension in Lane Cove 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 Lane Cove's topography can collect water against rear setbacks if the contour survey is sloppy.
Lane Cove Planning Context
Lane Cove has its own LEP and DCP layered over State planning controls. For extending in Lane Cove, 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. R3 / B4 mixed zoning on most Lane Cove blocks permits single dwellings, alterations, and additions. Buildana checks every overlay (heritage, bushfire, flood, acid sulfate soil, biodiversity) before quoting.
Where the Money Goes on a Lane Cove Extension
Cost breakdown for a typical extension in Lane Cove: structure and frame around 30%, slab and foundations 8–14% (driven by Class M (sandstone ridges) / H–E (river fall) soil), roofing and external 10–12%, services (plumbing, electrical, HVAC) 12–18%, fit-out (kitchen, bathrooms, joinery) 18–25%, and finishes (paint, tiles, flooring) 8–12%. The remaining 4–6% covers approvals, certifications, and site establishment. Buildana itemises every line so you see what you're paying for — no lump sums hiding margin.
What Makes a Extension Work in Lane Cove
Lane Cove (2066) is part of Lane Cove. St Leonards (2.5 km) from the nearest station. Building well here means understanding what the suburb actually rewards — and what it punishes. Reward: thoughtful orientation, family-scale outdoor entertaining, durable materials that look right against the 1900s–1960s + apartments streetscape, and floor plans that handle multi-generational living without feeling cramped. Punish: over-glazing on west elevations (summer heat is brutal), thin slab specs on Class M (sandstone ridges) / H–E (river fall) ground, generic project-home elevations that ignore the street rhythm. Buildana has built across Lane Cove long enough to know where the line sits.
Realistic Lane Cove Timeline
End-to-end timeline for a home extension in Lane Cove, lodgement-realistic: 8-14 weeks for DA, depending on neighbour notification and any RFI rounds. Add 2-3 weeks for documentation pack assembly before lodgement (BASIX, geotech for Class M (sandstone ridges) / H–E (river fall), contour survey, hydraulic). Add 1 week for Construction Certificate post-approval. Construction runs 3-6 months depending on scope. Buildana provides a dated programme in every contract, not a vague "12-18 months" range.
Builder's Take on Lane Cove
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.
Lane Cove vs Nearby Suburbs
Lane Cove vs nearby suburbs — key metrics for extending.
| Suburb | Median Price | Typical Lot | Soil Class | Era | Station |
|---|---|---|---|---|---|
| Lane Cove2066this suburb | $2.4M–$4.0M | 400–700m² | Class M (sandstone ridges) / H–E (river fall) | 1900s–1960s + apartments | St Leonards (2.5 km) |
| Lane Cove North2066 | $2.5M–$4.2M | 500–800m² | Class M (sandstone ridges) / H–E (river fall) | 1900s–1970s + apartments | Artarmon (1.5 km) / Crows Nest Metro 2024 |
| Lane Cove West2066 | $2.6M–$4.5M | 600–1,200m² | Class M (sandstone ridges) / H–E (river fall) | 1900s–1960s | St Leonards (4 km) |
| Longueville2066 | $3.5M–$7.5M | 600–1,400m² | Class M (sandstone ridges) / H–E (river fall) | 1880s–1940s heritage | Wollstonecraft (4 km, ferry) |
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.
Have a question about your project?
Talk to our team — free site assessment and fixed-price quote.
Quality Promise
We extend Lane Cove 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
Everything that has to be right before we touch the ground. On-site assessment of your 1900s–1960s + apartments-era home in Lane Cove. We check structural condition, block dimensions (400–700m²), setback availability, and Lane Cove Council's DCP requirements. Written feasibility and cost estimate provided. Designing an extension is half about the new space and half about how it joins the old one. Doorway position, ceiling height transition, floor level matching, light wells — the junction makes or breaks how the finished home feels.
⏱The Lane Cove construction phase. Fixed price, programmed, supervised. We lodge your extension approval — CDC for eligible designs or DA through Lane Cove Council. Full documentation including structural engineering for Class M (sandstone ridges) / H–E (river fall) soil, BASIX, and shadow diagrams. CC issued before works start. For ground-floor rear extensions you usually stay in the house during the build, with temporary weatherproofing at the junction wall until the new section is locked up. Second-storey additions need a 4–8 week relocation during the roof-off and frame-up phase.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Final inspection, Occupation Certificate, 6-year structural warranty. Your Lane Cove home now has the space your family needs.
⏱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
Ready to take the next step?
Free consultation — no obligation, no pressure.
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
Buildana builds across greater Sydney — with deep roots in Western Sydney's Fairfield, Liverpool, Cumberland, Canterbury-Bankstown, and Blacktown LGAs.
Last updated: 1 April 2026
Explore Related Topics
Lane Cove Extension — Free Consultation
Free design consultation for Lane Cove 2066. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your Project