Estimator

Job Summary

Help make sure every Granny Flats WA project starts with the right information, accurate quantities and solid numbers.

We're looking for an Estimator to join our Estimating team and take ownership of the critical stage between signed contracts and production — checking plans, contracts and variations, preparing take-offs, maintaining pricing information and ensuring production receives accurate information for ordering and scheduling.

This is a detail-focused role where accuracy matters. You'll work across multiple jobs at once, identify inconsistencies before they become problems, and play a key part in making sure every build progresses on solid information.

Job Description

If you're someone who enjoys working with numbers, plans and problem-solving — and takes pride in getting things right the first time — this role was built for you.

Granny Flats WA is a family-owned Perth builder with over 20 years' experience delivering granny flats, renovations and extensions throughout Perth. We are in a growth phase and looking for someone who thrives on accuracy, ownership and continuous improvement.

As the Estimator, you will be responsible for checking that contracts, approved plans and variations align before production information is finalised, preparing take-offs and quantities, maintaining pricing information and supporting the smooth transition of projects into production.

What You'll Do

- Review signed contracts, approved plans and variations to ensure information aligns before production proceeds
- Identify and resolve discrepancies between contracts, plans and variations
- Prepare accurate take-offs and quantities for ordering and scheduling
- Enter quantities into order sheets for production planning and procurement
- Maintain pricing schedules and variation pricing information




- Review supplier quotes and ensure they align with project requirements
- Check steel framing information against approved plans and contract inclusions
- Monitor active jobs and maintain visibility over outstanding items
- Liaise with drafting, sales, client liaison, production teams, suppliers and subcontractors
- Escalate issues, risks or discrepancies before they affect project delivery

About You

- Experience in construction administration, estimating support, procurement, project coordination, drafting support or a similar role is preferred
- Some exposure to residential construction, plans, quantities, pricing or technical documentation
- Comfortable, or developing confidence, reading residential building plans
- Strong attention to detail and accuracy
- Organised and able to manage multiple tasks and priorities
- Good Microsoft Excel, Outlook and Word skills
- Willingness to learn new systems and processes, including Procore
- Proactive, reliable and committed to seeing tasks through to completion
- Genuine interest in residential construction and the building industry
- Strong communication skills and the ability to work collaboratively across teams

What We Offer

- Full-time office-based role in Booragoon
- Supportive and collaborative team environment
- Opportunity to develop estimating skills within a growing residential building company
- Stable pipeline of work across granny flats, renovations and extensions
- Genuine long-term career opportunity
- Market-competitive salary based on experience

Apply Now

$90,000 - $110,000 + Super, depending on experience.

If you're organised, detail-focused and want to play a key role in helping projects move successfully from contract to construction, we'd love to hear from you.

A full Position Description will be provided to shortlisted candidates.

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📌 Estimator (City of Melville)
🏢 Granny Flats WA
📍 City of Melville