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Granny Flats by Hallmark

Updated 2026-09-05 · 3,151 reviewed · 179 listed · Scored from 6 Google reviews · How we rank ›

5.0(6) 67 composite score See reviews on Google ✓ Google-verified
Granny Flats & Home ExtensionsHome BuilderConstruction CompanyBuilding Consultant
Granny Flats by Hallmark
Services
Granny Flats & Home Extensions, Home Builder, Construction Company
Reviews
6
Best for
Homeowners adding granny flats or extensions in tight backyard spaces who value clear communication and mid-build flexibility.

Business data from Google Business Profile, checked 2026-09-05.

What reviewers think

Every reviewer credits Mark and his team with delivering granny flats and extensions on time, with high-quality finishes and minimal backyard disruption. Clients consistently praise transparent advice, willingness to accommodate mid-build changes, and personable site communication that made a potentially stressful process feel smooth and collaborative.

Praised for
  • on-time delivery
  • transparent communication
  • responsive to changes
  • quality craftsmanship
  • minimal disruption during work
on-time-handoverquality-craftsmanshipresponsive-teamprofessional-staffpost-handover-supporttransparent-pricing
Best for: Homeowners adding granny flats or extensions in tight backyard spaces who value clear communication and mid-build flexibility.

Strengths

  • on-time completion
  • works well in tight spaces
  • transparent communication
  • open to mid-build changes

Worth knowing

  • Mark leads projects from consultation to handover
  • handles custom-designed garage and ancillary accommodation
  • manages builds in tight-access spaces with minimal disruption
  • accommodates design changes during construction

What reviews say by service

Granny Flats & Home Extensions
custom granny flats delivered on time with high-quality finishes and responsive client communication
Home Builder
custom-designed ancillary accommodation built to schedule in constrained spaces
Construction Company
professional site management minimizes disruption and incorporates client feedback throughout
Building Consultant
provides transparent advice and design guidance from initial consultation through project completion

How it compares

  • Rated 5 against a 4.79 average across the 61 granny flats & home extensions businesses listed here.
  • Has more Google reviews than 37% of the businesses in this directory.

How did this business earn its score?

How We Score
Star rating 79
Review volume 37
Review recency 50
Review sentiment 81
Profile completeness 75
Verification 30

Rating breakdown

5
6
4
0
3
0
2
0
1
0

Questions people ask

Do you handle granny flats in small backyards?
Yes. Reviews describe successful builds in tight-access spaces with minimal disruption to the existing property.
Can I change things once the build starts?
Yes. Clients report Mark and his team are open to suggestions and changes as work progresses.

Similar home builders nearby

Marquee Homes
63 low data

Marquee Homes

4.0(4)

Marquee Homes earned strong marks for custom builds on difficult sites. Mark (the owner) and supervisor Blair were noted for rolling up sleeves on site, adapting to challenges, and delivering quality results. Limited review detail overall, but the praise centres on personal attention and willingness to tackle complex work.

Custom Home BuildersHome BuilderDuplex & Multi-Unit Builders
West Coast Hifi
80

West Coast Hifi

4.5(90)✓ Google-verifiedPublishes prices

Staff know their gear and treat customers as people, not just sales. Matt, Kieran, Mark, Steve, and Jeremy are repeatedly named for spending time understanding what buyers need, sourcing hard-to-find stock, and fixing problems on their own dime. Pricing feels fair and installation work is thorough. One gap: a TV order in early 2024 dragged from early January to early February with poor communication about delays, though the installer himself was excellent. Shopping here feels like visiting experts who listen first and sell second. Staff will refer you elsewhere if that suits your ears better. A long-time customer notes the recent ownership refresh lifted both the store look and service level noticeably.

Custom Home BuildersHome BuilderConstruction Company
Home Venting Solutions - Rangehood and Venting Specialists
91

Home Venting Solutions - Rangehood and Venting Specialists

4.9(284)✓ Google-verified

Home Venting Solutions delivers dependable rangehood and venting installation across Perth metro. Reviewers consistently praise the team for tackling difficult layouts others refuse, with named technicians like Will, James, Matt, and Stuart earning trust for patience, clean work, and transparent communication. The business installs everything from compact kitchen hoods to roof-mounted external motor systems and specialty vents. Customers note fast appointment slots and same-day problem resolution. One reviewer flagged cost as steep, though most rate value fairly against the professional outcome and aftercare support offered.

Custom Home BuildersHome BuilderGranny Flats & Home Extensions

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Last updated 2026-09-05