April 8, 2025
Blue Mountains Council Stormwater & Drainage Requirements
Blue Mountains DCP 2015 stormwater and WSUD requirements for builders - ridge-top development, World Heritage catchments and sensitive discharge design.
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Updates from Contrive Consultants.
March 25, 2025
Granny Flat Stormwater & Site Rules Across NSW Councils
How stormwater disposal, OSD and site rules affect granny flat approvals across NSW councils, and how to avoid the traps on downstream…
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March 18, 2025
WAE Surveys & OSD Certification: Get Your OC Without Delays
What a works-as-executed survey must show, how OSD certification works, and how builders avoid the as-built failures that stall occupation certificates.
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March 11, 2025
Cumberland Council Stormwater & OSD Rules for Duplex Builds
Cumberland DCP 2021 stormwater and OSD requirements - a practical guide for duplex and townhouse builders in Merrylands, Granville and Guildford.
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March 4, 2025
NSW Low and Mid-Rise Reforms: Dual Occs and Terraces Expand
Stage 2 of the NSW low and mid-rise housing reforms commenced 28 February 2025. What the dual occupancy and terrace standards mean…
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February 18, 2025
Driveway Design and Drainage: NSW Gradient and Crossover Rules
Driveway gradients, transitions, scraping checks and council crossover approvals in NSW - how to design access that cars can use and councils…
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February 11, 2025
Why Councils Reject OSD Designs (and How to Avoid It)
The most common reasons Sydney councils knock back OSD designs - and how builders can avoid the RFI-and-resubmit cycle that stalls approvals.
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February 4, 2025
Waste Management Plans for DAs: What NSW Councils Want in a WMP
What NSW councils look for in a DA waste management plan - demolition, construction, operational waste, bin storage, collection design and swept…
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January 21, 2025
10 Most Common Stormwater RFIs From Sydney Councils (Avoid Them)
The 10 stormwater RFIs Sydney councils raise most often - why each one happens and how to lodge a first submission that…
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January 14, 2025
Charged Downpipe Systems to Rainwater Tanks: Rules That Pass
Design rules for charged (wet) downpipe systems feeding rainwater tanks - head, pipework, overflow and maintenance details that pass certification.
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