Home Extension Builder Randwick
Home extension specialists — additions, second storeys and structural reworks on existing homes.
Home Extension in Randwick — what it actually takes in 2026
Extension is the dominant scope across Randwick coastal heritage suburbs (Clovelly, Coogee village, South Coogee, Maroubra heritage core, Malabar, La Perouse) and Daceyville garden suburb where KDR is restricted. Federation cottage additions, inter-war heritage extensions, cliff-top heritage-grade work all common. Suspended slabs and substantial retaining on cliff-fall sites. Coastal salt-grade specs standard on coastal-facing builds. Heritage Council expects retention of stained glass, ornate plasterwork, slate roofing on protected streets. Apartment renovations the other major category along Anzac Parade UNSW corridor through Kensington/Kingsford, Coogee village, Maroubra Junction. Realistic budget $300K–$900K for thoughtful 60–130m² addition inland/mid-tier; $700K–$1.8M premium coastal heritage-grade work; $1.2M–$3M direct beachfront/clifftop.
Why Randwick owners choose Buildana
- Fixed-price contracts referencing the Rawlinsons Australian Construction Handbook 2026 (Sydney column) — no estimate-only quotes that climb mid-build.
- In-house design and approvals coordination — DA, CDC, heritage, bushfire BPA, Coastal Management referrals all handled.
- Site investigation at proposal stage — soil, slope, sandstone, BAL, heritage and tree-protection assessment so the contract sum holds.
- Asbestos assessment and SafeWork NSW–compliant removal included on every pre-1990 stock project as standard.
- Owner-led project management — Oliver Alameri (NSW Builder Licence) signs every contract and runs every job.
Ready to talk home extension in Randwick?
Book a free site assessment with Oliver Alameri. We'll cover soil, slope, council overlays, realistic 2026 costs and the planning pathway for your block.
Home Extension Randwick — frequently asked questions
Do I need DA approval for a home extension in Randwick?
Most extensions exceeding 50m² floor area or altering envelope require DA in Randwick. Smaller compliant additions may use CDC fast-track. Heritage Conservation Areas require DA regardless of size. Buildana assesses your scope at proposal stage and provides the planning pathway in writing.
What does a second-storey addition cost in Randwick?
Second-storey additions in Randwick typically run $300K–$1.4M depending on footprint, structural reinforcement to existing footings, heritage overlay, and finish specification. Buildana provides fixed-price contracts after structural assessment.
Can I stay in the home during construction?
Most ground-floor rear extensions can be staged so you remain in the existing home during major works. Second-storey additions usually require temporary relocation for 4–8 weeks during structural and roofing works. Buildana confirms the staging plan at contract.
Other services across Randwick
Neighbouring Sydney LGAs we build in
We work right across the Sydney basin. If your block sits on the boundary of Randwick, or you're comparing options in a neighbouring council area, here are the closest LGAs we cover with the same depth of local knowledge.
We build across every Sydney LGA
Buildana works across all 28 Sydney metropolitan LGAs. Pick the council area your block sits in for a deep-dive on local soil, heritage controls, DCP rules, and realistic cost ranges.
Western Sydney
South-West Sydney
Inner West & River
North Shore & Beaches
Eastern Suburbs