Land records · Parcel maps · October 7, 2026
Stormwater Management Plan for Development
What a stormwater management plan is: an engineered plan showing how a site will control runoff quantity and quality, with ponds, basins, or rain gardens.
Stormwater management plan is an engineered plan, required for many development projects, that shows how a site will handle rainwater runoff. When land is covered with roofs and pavement, more water runs off, faster, and carries pollutants. A stormwater plan describes how the project will control runoff volume, peak flow, and water quality using practices such as detention ponds, infiltration basins, rain gardens, permeable pavement, and swales. It also sets maintenance responsibilities for these facilities after construction. This page is general land-records background, not legal advice.
What the plan addresses
| Goal | Common practices |
|---|---|
| Peak flow control | Detention ponds, underground vaults |
| Volume reduction | Infiltration, rain gardens, permeable pavement |
| Water quality | Bioretention, filters, vegetated swales |
| Erosion control during construction | Silt fence, sediment basins |
| Long-term maintenance | Agreements and inspections |
When a plan is required
Requirements depend on local and state rules and federal stormwater permits. Thresholds are often based on the amount of land disturbed or new impervious surface created. Small residential projects may need simple measures, while subdivisions and commercial sites need full engineered plans.
Maintenance agreements
Many jurisdictions require recorded stormwater maintenance agreements that bind current and future owners to maintain ponds and other facilities. These appear in title searches. HOAs often own and maintain subdivision ponds.
Easements
Stormwater facilities often sit in drainage easements that give the city or HOA access for inspection and repair.
Relationship to grading
The grading plan directs water to stormwater facilities. The two plans work together.
Wetlands and waterways
Runoff controls help protect nearby wetlands and streams. Projects near wetlands may need a wetland delineation and additional permits.
Example
A developer building 40 homes must keep post-development peak runoff at or below pre-development levels. The plan includes a detention pond in a common area, swales along lot lines, and a recorded agreement making the HOA responsible for mowing, sediment removal, and outlet repairs.
Owner responsibilities
Owners of lots with rain gardens, underground systems, or ponds may be responsible for maintenance. Failure to maintain can lead to notices or charges.
Finding stormwater plans
Engineering or public works departments keep approved plans. Recorded maintenance agreements are in the land records.
Stormwater fees
Some cities charge stormwater utility fees based on impervious area, separate from property taxes.
Common stormwater facilities on residential lots
Homeowners in newer subdivisions may find a rain garden in the front yard, a dry well that collects roof runoff, an underground chamber beneath a driveway, or a section of permeable pavement. These features are part of the approved plan and generally must not be removed or paved over. Ask the seller or HOA for maintenance instructions and check recorded plats and agreements for notes about them.
Inspections
Many cities inspect stormwater facilities periodically or require owners to submit inspection reports. Clogged outlets, sediment buildup, and erosion are the most common problems found.
Bottom line
A stormwater management plan shows how a project will control runoff quantity and quality with ponds, basins, and green practices, and who maintains them. Recorded maintenance agreements may bind future owners. Check land records and engineering files when buying property with stormwater facilities. Explore parcels via the Platbookmapper map.
Stormwater management plan FAQ
What is a stormwater management plan?
A plan for controlling runoff from development.
Who maintains a stormwater pond?
Often an HOA or owner under a recorded agreement.
When is a stormwater plan required?
Usually above thresholds for disturbed land or impervious area.
What is detention vs retention?
Detention holds water temporarily; retention keeps a permanent pool.
Are stormwater agreements recorded?
Often, and they bind future owners.