Cossill & Webley Consulting Engineers

The Cossill & Webley team had a fantastic time at the first DevelopHER Perth Unwind Event last Friday, proudly supporting this brilliant initiative as a sponsor. Big shoutout to the powerhouse ladies - Emma Fletcher, Phoebe Telchadder and Jasmine Lewis for creating such an inspiring space for women in property and land development. 🙌 DevelopHer is all about connecting, supporting, and celebrating women in the property and land development space - and last Friday’s event delivered exactly that (plus a healthy dose of laughs, inspiration, and maybe a sneaky drink or two 🍸😄). Special mention to our own CW champions - Jessica Boden, Alejandra Castro, Sarah Leila Qodri, Avril Thomson and Ann Ababa — for representing us so well and bringing the energy! Here’s to more collaboration, more conversations, and more women leading the way in our industry. 💪✨

Perth’s housing pipeline continues to face significant pressure as the demand for new homes outpaces the delivery of enabling infrastructure. While the Department of Planning, Lands and Heritage (DPLH) has clearly identified where housing supply should be delivered, the servicing required to support that growth—particularly water, wastewater and power networks—remains heavily constrained. The result is a widening gap between zoned and serviced land, reducing the industry’s ability to respond quickly to market demand and population growth. At the UDIA’s recent Infrastructure Summit, Cossill & Webley Director Nathan Butson highlighted the critical importance of aligning land use planning with infrastructure planning across Perth’s key Growth Corridor Areas. Nathan noted that the pace of infrastructure planning and inter-agency coordination is not keeping up with the State’s strategic planning intent. Without timely and targeted infrastructure planning, even the best-planned growth areas risk delays that hinder the release of much-needed housing supply. Cossill & Webley is here to help. With active projects across all eight Housing Priority Corridors and deep knowledge of servicing strategies, developer intentions and planning processes, we’re committed to supporting coordinated, scalable housing delivery. Backed by strong industry connections, strategic insight and a genuine #TeamWA mindset, we’re focused on enabling more affordable, well-serviced communities for Perth’s current and future residents.

What a fantastic night at the recent WiLD: Women in Land Development event, proudly hosted in Villawood Properties’s new office in Southbank! Cossill & Webley is proud to continue being a strong supporter for WiLD creating these opportunities to encourage meaningful industry relationships. Great work to our own Caroline Brady and Sara Ziffer for continuing this initiative in the Melbourne scene. We love to see it and look forward to supporting future events!

At Cossill & Webley’s recent Technical Discussion Session, our own Matt Hansen along with the assistance of Daniel Nguyen (CW’s Data Scientist) presented to the CW staff the latest information in relation to civil works costs across the Perth Metro area. The presentation included a history of the civil works costs over recent years and the current costs for Power, Sewer and Water Infrastructure, as well as Major Intersections and Corridor Cost per Lot. With over 60 active projects and more than 100 progress payment claims processed by the CW Perth office every month, this represents a considerable amount of data for which we collect and analyse to ensure all our Engineers have a solid understanding of the cost fluctuations on our current and likely future Development projects. Naturally, access to this data also assists with the accuracy of our Opinion of Probable Cost Estimates. Feel free to reach out to Matt if you have any queries.  

We’re thrilled to announce that Jey Shivakumar is presenting at the All-Energy Australia Conference in Victoria on 29-30 October 2025. His session, “DER in Large-Scale Master-Planned Communities: Network Benefits,” will highlight how distributed energy resources can transform major developments — enhancing grid stability, sustainability, and community resilience. Don’t miss this opportunity to hear insights on integrating smart energy solutions into the communities of the future. Learn more at https://lnkd.in/fJ2cMhX.

We were delighted to bring the local St Kilda Road land development community together for a relaxed evening of rooftop drinks, bites, and conversation. With stunning views from the proUrban rooftop and great company with our neighbours, we had a blast. What a great turnout for the afternoon - thanks all for joining us! proUrban Advisory, Planning & Management #neighbours #landdevelopment #sunshinevibes

*Introducing Our New Look* Today, we’re proud to reveal a refreshed look for Cossill & Webley.   For over 35 years, technical excellence, trust, and strong relationships have been at the heart of everything we do. Our new look builds on that legacy and brings fresh energy to what sets us apart - a forward-thinking, solutions-focused team that’s redefining what it means to be leaders in engineering consultancy across Perth, Melbourne, and Geelong.   This follows another milestone earlier this year with our Perth team relocating to a new office in Subiaco. A space designed to set the tone for this next chapter.   This is more than a new look. It’s a renewed commitment to our people, our clients, and the future we’re building together.   And there’s more to come – stay tuned!

We're so proud our project Cassia Estate has won the Land Development Award for the 2025 Earth Awards with Tracc Civil ! Well done! We're delighted to work with Tracc, Satterley Property Group, and DevelopmentWA on the Cassia Rise and Cassia Glades projects.

Cossill & Webley was proud to support the Urban Development Institute of Australia (WA)'s Greenfield Market Insights luncheon, with our Director Avril Thomson presenting on the panel, alongside Colin Keane, Nigel Satterley and Samantha Thompson. We agree with forecasts from Colin that WA land sales will continue to be strong and supply constraints will likely impact housing supply and affordability. The luncheon highlighted the urgent need to address the challenge with a comprehensive strategy that integrates planning, infrastructure needs, environmental constraints and developer intentions. The “how” requires a collective effort from government stakeholders and industry with a solution-oriented mindset to navigate the complexities of the planning and development framework. At Cossill & Webley, we are dedicated to tackling complex challenges and fostering collaborative efforts to increase housing availability in Perth. By embracing innovation and a proactive mindset, we can collectively shape a vibrant and sustainable future for our growing city. #UrbanDevelopment #PerthHousing #SustainableCities #HousingAffordability #EngineeringExcellence #Innovation