Home Extension Builder Riverview — Approved in 60 Days
Riverview 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 300Riverview Home Extensions — Fixed Price
Extension in Riverview works detached stock with HCAs on several streets and Bushfire BAL on bush-edge lots. Realistic budget $400K–$1.1M for 70–140m² addition. Pre-construction 5–7 months including bushfire consents.
Most Riverview blocks run 500–1,200m² on Class M (sandstone ridges) / H–E (river 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: $3.0M–$5.5M. Nearest rail is Wollstonecraft (3 km).
Buildana manages the complete home extension process in Riverview — 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 Riverview 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–1950s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Wollstonecraft (3 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 Riverview?
Riverview is the elevated suburb above Lane Cove River with Saint Ignatius' College the central landmark. Federation mansions, inter-war heritage and contemporary on 500–1,200m² blocks. Heritage Conservation Areas cover several streets. Sandstone-dominant soil. Bushfire BAL on bush-edge lots facing the river.
Riverview's established streetscape and median house prices of $3.0M–$5.5M 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 (3 km) connects Riverview to the wider Sydney network. 1900s–1950s-era homes in Riverview 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 Riverview 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 Riverview — key facts
- Suburb
- Riverview, NSW 2066
- Council / LGA
- Lane Cove Council (Lane Cove)
- Primary zoning
- R2 Low Density / R3 Medium (Lane Cove village)
- Typical lot size
- 500–1,200m²
- Soil class
- Class M (sandstone ridges) / H–E (river fall)
- Median house price
- $3.0M–$5.5M
- Home era
- 1900s–1950s
- 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 Riverview — Local Context
What Riverview Soil Means for Your Extension
Most blocks across Riverview (2066) classify as Class M (sandstone ridges) / H–E (river fall) — extremely reactive clay. Translation for a home extension: foundation cost lands somewhere between $45,000–$80,000, depending on building footprint and how the engineer reads the borehole. Reactive soils move with seasonal moisture. A waffle pod alone won't cut it on a Class M (sandstone ridges) / H–E (river fall) site — you need stiffened edge beams, sometimes piered footings, and careful detailing around wet areas to stop differential movement showing up as cracking. Buildana includes the geotech report, structural engineering, and slab design in every quote. No site allowance, no provisional sum.
What Lane Cove Council Wants to See
Approval in Riverview comes down to documentation quality. Lane Cove Council processes a high volume of residential applications, and the ones that get approved fast share three traits: clean drawings that show every required setback dimension on plan; a BASIX certificate that matches the actual specification (not a stand-in); and an engineering package sized correctly for the Class M (sandstone ridges) / H–E (river fall) ground. We prepare every document at full lodgement standard the first time.
Where the Money Goes on a Riverview Extension
Cost breakdown for a typical extension in Riverview: 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.
Riverview Housing Stock & What That Means
Most homes in Riverview were built 1900s–1950s. 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 1900s–1950s usually need wiring, plumbing, and insulation upgrades to meet NCC 2025 — worth costing that into the extension scope upfront, not as a variation later.
What Recent Approvals Show
Lane Cove Council's recent decisions for Extensions in Riverview reveal a clear pattern — applications with proper structural engineering tied to the existing footings on Class M (sandstone ridges) / H–E (river fall) soil and clean shadow analysis to neighbours' POS are progressing without RFIs. Sloppy lodgement adds 4-8 weeks of round-trip; clean lodgement doesn't.
Builder's Take on Riverview
Extension or move? In Riverview, 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.
Lane Cove Council setback and height rules apply to the extension, not the whole house. An older Riverview home that was built inside the setback might not be extendable to the boundary. We check that during feasibility so there's no expensive surprise at DA stage.
Riverview vs Nearby Suburbs
Riverview vs nearby suburbs — key metrics for extending.
| Suburb | Median Price | Typical Lot | Soil Class | Era | Station |
|---|---|---|---|---|---|
| Riverview2066this suburb | $3.0M–$5.5M | 500–1,200m² | Class M (sandstone ridges) / H–E (river fall) | 1900s–1950s | Wollstonecraft (3 km) |
| Longueville2066 | $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) |
| Lane Cove West2066 | $2.6M–$4.5M | 600–1,200m² | Class M (sandstone ridges) / H–E (river fall) | 1900s–1960s | St Leonards (4 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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Quality Promise
Every Buildana home extension in Riverview is delivered under a fixed-price contract — from design consultation through to defect-free handover.
How It Works
From First Call to Final Key
Free consultation at your Riverview home. We inspect the existing structure, check Lane Cove Council's controls, measure available space, and discuss what you need.
⏱Two design moves are usually on the table: match the existing house so the extension reads as original, or contrast with it so the new section is clearly modern. Both work — choice is aesthetic, and we'll show 3D renders of both before you commit.
⏱CDC (10–15 business days) or DA through Lane Cove Council depending on scope. Structural engineering, BASIX, and all documentation prepared and lodged.
⏱Construction phase connects new to existing — footings, frame, roof tie-in, waterproofing at junction, internal fit-out and external finish. Staged works minimise disruption to your daily routine in Riverview.
⏱Final inspection focuses on the integration: paint blend, flooring transitions, ceiling height, junction waterproofing, sound transmission. The extension shouldn't feel bolted on — it should feel like the house was always meant to be this size.
⏱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
Extend Your Home in Riverview
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