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Core WA - Home Renovation and Second Storey Extension Specialist

Updated 2026-09-05 · 3,151 reviewed · 179 listed · Scored from 9 Google reviews · How we rank ›

4.1(9) 53 low data composite score See reviews on Google ✓ Google-verified
Granny Flats & Home ExtensionsBuilding ConsultantHome BuilderCustom Home BuildersConstruction CompanyDuplex & Multi-Unit Builders
Core WA - Home Renovation and Second Storey Extension Specialist
Services
Granny Flats & Home Extensions, Building Consultant, Home Builder
Reviews
9
Best for
homeowners in Perth's Western Suburbs seeking renovations while remaining in their home.

Business data from Google Business Profile, checked 2026-09-05. Facts from the business's own website were fetched 2026-09-05.

What reviewers think

Core WA delivers high-quality renovations and extensions with owner involvement and careful site work; the owner and named team members (Darren, Pat, Martin, Kaz) earn consistent praise for professionalism and problem-solving. One recent complaint about vehicle parking damage and dismissive management response suggests cracks in their customer-care consistency.

Based on limited recent reviews, so treat this as low-confidence.

Praised for
  • owner-led quality and attention to detail
  • professional and reliable tradespeople
  • collaborative design approach
  • transparent pricing and communication
  • ability to work around occupied homes
Watch-outs
  • vehicle damage and site management issues
  • poor handling of complaints by management
quality-craftsmanshipresponsive-teamprofessional-staffdesign-flexibilitypost-handover-supporton-time-handoversite-cleanlinesspoor-communication
Best for: homeowners in Perth's Western Suburbs seeking renovations while remaining in their home.
Think twice if: Site management and complaint handling inconsistency has caused friction; check references on neighbouring impact before committing.

Strengths

  • owner-led builds reduce subcontracting risk
  • proven track record working in occupied homes
  • hand-picked, stable team across multiple projects
  • collaborative design and transparent pricing

Worth knowing

  • Darren Johnston is managing director and leads builds; team includes Pat, Martin, Kaz
  • second storey addition completed in under 6 weeks despite poor weather
  • extensive renovation in Floreat (six-person household remained on-site) completed on time and about 5% over contract after provisional sums and owner-requested additions
  • HIA award finalist work mentioned
  • site noted as consistently tidy and well-supervised by neighbours

What reviews say by service

Granny Flats & Home Extensions
second storey additions completed on time, under demanding conditions; quality praised but site management complaint on record.
Custom Home Builders
collaborative design process and transparent pricing; owner-led approach appeals to those seeking direct contact.
Home Builder
renovation work delivers high quality and professionalism; one complaint about property damage and unresponsive management.

How it compares

  • Rated 4.1 against a 4.63 average across the 91 building consultant businesses listed here.
  • Has more Google reviews than 44% of the businesses in this directory.

How did this business earn its score?

How We Score
Star rating 65
Review volume 43
Review recency 0
Review sentiment 53
Profile completeness 75
Verification 30

Rating breakdown

5
7
4
0
3
0
2
0
1
2

Questions people ask

Can you build while we stay in the home?
Yes. Multiple reviews confirm they have completed projects with families living on-site, including a complex six-person household renovation in Floreat.
Who runs the builds?
Owner Darren Johnston leads projects personally and works with a core team including Pat, Martin, and Kaz, rather than subcontracting everything out.
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Last updated 2026-09-05