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One Co Building

5.0 (11 reviews)

Belmore, NSW

About this business

One Co Building is a boutique custom home builder that designs and constructs luxury homes and duplex developments for discerning clients. They combine hands-on craftsmanship, close collaboration with architects and suppliers, and personalised project management to deliver architectural quality and a seamless client experience.

Works on
Residential
Job types
New builds

Get in touch

Visit websiteCall 1300 945 435Email

Service areas

Servicing Belmore and surrounding locations.

See what local homeowners are saying

  • BRBruno31 Mar 2025

    Justin and the team were very professional, easy to deal with, and very fairly priced for the amazing quality of work that they provided. Very happy with my experience

  • AGAllan G4 Jan 2021

    I just used One Co for some home renovations, their workmanship and meticulous attention to detail has led me to write this review. The quality of work from Justin and his workers is incredible , addi...

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    I just used One Co for some home renovations, their workmanship and meticulous attention to detail has led me to write this review. The quality of work from Justin and his workers is incredible , additionally with the fair pricing you can’t go wrong. Highly recommended.

  • ECEdy C4 Jan 2021

    I’ve personally worked with Justin and his team on many jobs ranging from small repairs to much larger remediation and renovations and can happily say he and his superb team have extensive trade knowl...

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    I’ve personally worked with Justin and his team on many jobs ranging from small repairs to much larger remediation and renovations and can happily say he and his superb team have extensive trade knowledge, a keen attention to detail, and, above all, thrive on customer satisfaction.

  • JKJohn K4 Jan 2021

    Best building service and amazing finishes one co turned my 2 bedroom boxes up shack to a massive 3 bedroom open plan living and kitchen home. Highly recommend

  • AAAnthony A4 Jan 2021

    Recommend the team at One Co for any of your building needs! The job was delivered on time, to budget and professionally.

  • JKJessica K4 Jan 2021

    Amazing service. Professional and quality work !

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Frequently asked questions

How much do builders typically charge?
Builder costs vary widely depending on the job type and complexity. Minor repairs are generally much less than extensions, small builds or structural alterations that need foundations, framing or specialist input. Most quotes include a call‑out fee plus labour and materials, and the page shows live pricing to help you compare options.
Do builders charge call-out fees?
Call‑out fees are common and typically cover travel and an initial inspection or assessment. This fee is usually separate from hourly labour and materials, and after‑hours or weekend attendance often attracts higher rates. Ask whether a call‑out or minimum charge applies when requesting quotes.
Do builders need a licence in Australia?
Yes. Building work generally needs to be carried out by a licensed builder in every state and territory, and NSW builders are regulated by NSW Fair Trading. Builders should be able to provide their state builder/contractor licence number and show appropriate insurances and ABN/GST registration. In Victoria, domestic building insurance is required above a state threshold for certain contracts.
How do I get a quote from One Co Building?
One Co Building lists phone, email, or through their website on this profile, so you can contact them directly for pricing and availability. Share a short scope and photos to get a faster quote.
What areas does One Co Building service?
One Co Building services Belmore and surrounds. Contact them to confirm service areas.

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