Stormwater management plan (SWMP)
The report setting out the site stormwater strategy, water-quality response and discharge or detention basis where council requires it.
What to send → Services · Stormwater Management Plans
Development and site SWMP reports for Victorian planning permits.
Stormwater Report prepares development SWMPs, site SWMPs and stormwater management reports for planning permits, council RFIs and development applications across Melbourne and regional Victoria.
Councils do not all use the same label. A request for a stormwater management plan, stormwater catchment management plan, SWMP report, drainage response, WSUD plan or BlueFactor request usually points to the same practical need: a site-specific stormwater response that answers the permit condition or RFI as written. Send the council wording, site address, plans and survey, and the scope is set from what council has actually asked for.
Council wording
Council asked for a stormwater document. What does it mean?
Stormwater catchment management plan
Wording some Victorian councils use. It may overlap with a SWMP, but the catchment mapping and treatment scope should be set from the exact council request.
WSUD response →Development SWMP
A stormwater management plan prepared for a planning permit, subdivision, multi-unit or commercial development application.
Clause 56 stormwater requirements →Site SWMP
Site-specific stormwater documentation rather than a template. Scope follows the council wording, the proposed development and the drainage constraints.
SWMP quote inputs →Construction SWMP
Worth checking before scope is set. It can mean planning-stage stormwater documentation, or construction-stage runoff and sediment controls, depending on who wrote the condition.
Send the wording →WSUD report or BlueFactor report
The water-quality part of the response. Melbourne Water presents BlueFactor as the STORM replacement for small Victorian developments; larger or more complex sites may need MUSIC.
WSUD and BlueFactor → Scope
What the report covers.
Council request review
Permit conditions, RFIs, subdivision triggers, local policy, and drainage correspondence are read before the report scope is set.
Stormwater strategy
The SWMP explains the broader runoff, drainage, water-quality, detention and discharge response for the current site.
Submission-ready report
The final draft is packaged for the planner, architect, and project engineer to submit with the permit or RFI response.
Most enquiries start with a council condition, planner note, or request for further information. Send the wording with the plans and we can confirm whether the SWMP should cover WSUD, OSD, Melbourne Water, Legal Point of Discharge, or other drainage constraints in the same package.
Triggers
When you need this.
If your council planner has asked for a stormwater management strategy, stormwater response, or drainage response, the SWMP is usually the document that ties the stormwater scope together. Common triggers include:
- Subdivisions
A Clause 56 stormwater response for a residential subdivision or related permit condition.
- Multi-unit and commercial
A Clause 53.18 or local-policy stormwater request for infill, multi-dwelling, commercial, or mixed-use development.
- RFI response
Council asks for clearer stormwater documentation before it can continue assessing the planning application.
- Drainage interface
The site has a Legal Point of Discharge, drainage capacity, easement, or Melbourne Water interface that needs to be coordinated in the permit package.
Coverage
Related services inside the SWMP scope.
Overall strategy
The SWMP explains the site constraints, proposed runoff response, drainage context, water-quality approach and the pathway for the Legal Point of Discharge.
WSUD
The water-quality, treatment, and reuse part of the response. It can include rainwater tanks, raingardens, bioretention, permeable surfaces, proprietary treatment devices, BlueFactor assessment, STORM scoring or MUSIC modelling, depending on the condition.
OSD
The peak-discharge and detention part of the response. When council asks for storage and outlet-control documentation, the SWMP can include the OSD sizing basis, storage requirement and discharge assumptions.
Assessment tools
BlueFactor, STORM and MUSIC: which stormwater tool applies?
Melbourne Water presents BlueFactor as the replacement for STORM when assessing stormwater management in planning applications for small Victorian developments. BlueFactor is recommended for development sites up to one hectare without public roads. This may include detached houses, townhouses, apartments, and smaller commercial, retail and mixed-use projects.
For larger or more complex sites, MUSIC modelling is generally the recommended approach instead. Existing STORM projects may be able to be transferred across to BlueFactor.
Which tool applies is driven by the council wording, the site area and the development type. If council has asked for a BlueFactor report, a STORM score or MUSIC modelling, send the condition and the plans and the right basis can be confirmed before the scope is set.
Coordination
Consultation.
A useful SWMP is not a generic template. The scope is set from the permit condition, RFI, subdivision pathway, council drainage advice and any Melbourne Water or authority correspondence already issued.
- Council conditions and RFIs
- The wording is checked first so the SWMP answers the request council has actually made.
- Planner and project-team coordination
- The stormwater response is coordinated with the current plans, survey, civil inputs and application pathway.
- Authority interfaces
- Melbourne Water, council drainage, easements, discharge points and capacity constraints are allowed for where they affect the permit response.
- Follow-up during assessment
- If council asks for clarification, the response can be adjusted to suit the updated plans or assessment comments.
Process
How it works.
- 01
Confirm the council request
We review the permit condition, RFI, subdivision pathway, or council note and confirm what the SWMP needs to answer.
- 02
Collect site inputs
Site address, plans, survey, drainage information, Legal Point of Discharge details, and any council or Melbourne Water correspondence are checked before the scope is set.
- 03
Set the stormwater strategy
The SWMP frames the broader runoff, drainage, water-quality, and detention response, with WSUD or OSD material included where council has asked for it.
- 04
Prepare submission-ready documentation
The report is written for the planner, architect, and project engineer to submit with the permit package or RFI response.
- 05
Support follow-up
If council asks for clarification, the SWMP response can be adjusted to match the condition and the project team's updated plans.
Information needed
What to send for a SWMP quote.
The fastest way to scope a SWMP is to send the exact council wording with the current plans, survey and drainage correspondence already issued.
- Site address and local council
- Current architectural or subdivision plans, including the roof plan and drainage direction
- Feature and level survey, if available
- Permit condition, RFI or council wording, exactly as written
- Rainwater tank location and volume, and the proposed reuse, if already designed
- Legal Point of Discharge or council drainage advice
- Melbourne Water correspondence, if already issued
- Any existing stormwater, WSUD, BlueFactor, STORM or MUSIC material
Example
Example scope.
For a typical infill site, the SWMP may need to explain the Legal Point of Discharge, proposed drainage strategy, water-quality response, and whether OSD or detailed WSUD material is needed. The final scope depends on the council condition, site constraints, and the project team's current plans.
Common questions
FAQ.
When does my project need a Stormwater Management Plan?
A SWMP is usually needed when council asks for a stormwater management strategy, stormwater response, or drainage response as part of a planning permit, RFI, or subdivision pathway. For residential subdivisions, Clause 56 is commonly relevant. For other urban development, Clause 53.18 or a local stormwater requirement may apply.
Is a SWMP the same as a stormwater management report?
In many planning and council contexts, yes. Council wording varies. A request for a stormwater management plan, stormwater management report, SWMP, drainage response, or stormwater response may all point to the same underlying need: a site-specific stormwater strategy matched to the permit condition or RFI.
Do you prepare development SWMPs across Melbourne and Victoria?
Yes. Stormwater Report prepares development SWMPs for planning permits, subdivisions, infill, multi-unit and commercial projects across Melbourne and regional Victoria. The report is scoped to the council condition, RFI wording and site constraints.
Council asked for a stormwater catchment management plan. Is that different from a SWMP?
It may overlap with a SWMP, but it should not be assumed from the label alone. That wording can ask for catchment areas marked and dimensioned, pervious and untreated impervious surfaces identified, and each catchment connected to its proposed WSUD treatment measure. Send the exact wording so the scope is set from the request council has actually made.
Do I need a BlueFactor report or MUSIC modelling?
Melbourne Water presents BlueFactor as the replacement for the STORM calculator for assessing stormwater management in planning applications for small Victorian developments. BlueFactor is recommended for development sites up to one hectare without public roads. For larger or more complex developments, MUSIC modelling is generally the recommended approach. The council wording, site area and development type determine which applies, so send the condition and plans before the basis is assumed.
Is a Melbourne SWMP different from a regional Victorian SWMP?
The structure is similar, but the council requirements, Legal Point of Discharge process, Melbourne Water referral status and local drainage constraints can differ. The SWMP needs to answer the actual planning pathway for the site, not just follow a generic template.
What does a council-ready SWMP include?
A council-ready SWMP explains the site constraints, proposed stormwater strategy, drainage and water-quality response, supporting calculations or assessment outputs where required, and how the documentation answers the council condition or RFI.
Is WSUD part of a SWMP?
Often, yes. The SWMP is the broader stormwater strategy. WSUD is the water-quality, treatment, and reuse part of that response. Some councils ask for one combined SWMP. Others ask for separate WSUD information beside the SWMP.
Is OSD part of a SWMP?
Sometimes. OSD is about controlling peak stormwater discharge with temporary storage and outlet control. If council asks for detention as part of the stormwater response, the OSD sizing and supporting calculations can sit inside the SWMP or be prepared as supporting material.
What information do you need for a quote?
Send the site address, council, current plans, feature and level survey if available, permit condition or RFI wording, and any Legal Point of Discharge, drainage, or Melbourne Water correspondence already issued.
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