September 9, 2025
Wollondilly Shire Stormwater Requirements for Builders
Wollondilly DCP 2016 stormwater and OSD requirements explained — Picton, Tahmoor and Wilton growth, rural-residential drainage and flood factors.
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Updates from Contrive Consultants.
September 2, 2025
Coastal Development & Stormwater: NSW Overlays Explained
How lagoons, dunes and coastal overlays shape stormwater design on the NSW coast — what builders and developers need to check before…
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August 19, 2025
Pool Drainage, Backwash and Stormwater: NSW Compliance Guide
Where pool backwash, emptying water and surrounds drainage must go in NSW — sewer vs stormwater rules, overflow in storms, and the…
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August 12, 2025
City of Parramatta Stormwater & OSD Requirements Explained
City of Parramatta stormwater rules under DCP 2023 — OSD to the UPRCT handbook, drainage plans and WSUD for infill and high-density…
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August 5, 2025
Servicing Constraints in Growth Areas: Check Before You Buy
Power, water, sewer, NBN and stormwater: the servicing checks builders and developers should run before buying land in Sydney's growth areas.
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July 15, 2025
Swept Path Analysis: When Councils Demand It and Why It Pays
When NSW councils require swept path analysis, which design vehicles matter, and how early vehicle turning checks rescue basement and driveway designs.
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July 8, 2025
OSD for Knock-Down Rebuilds & Tight Sydney Infill Lots
Fitting on-site detention on tight Sydney lots — tank placement, existing impervious credits and design tricks for knock-down rebuilds.
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June 17, 2025
Bioretention Design That Gets Approved: Media, Sizing, Checks
How to design bioretention that passes council review in Sydney: FAWB filter media specs, sizing rules, MUSIC alignment and the checklist assessors…
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June 10, 2025
CDC vs DA Stormwater Requirements in NSW: What Certifiers Expect
CDC vs DA stormwater requirements in NSW — what drainage documentation certifiers expect under the Codes SEPP, and how the two pathways…
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June 3, 2025
Dual Occupancy in Newcastle, Wollongong & Central Coast NSW
NSW housing reforms opened dual occupancy in R2 zones state-wide. What it means in Newcastle, Wollongong and the Central Coast, plus site…
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