When building a new home in Sandy Springs, GA, many homeowners are surprised to learn that stormwater runoff containment is the homeowner’s responsibility, not the city’s. This requirement is enforced by the City of Sandy Springs and is clearly documented in the approved site plan for every new home construction project.
As an experienced Sandy Springs home builder, we regularly help homeowners understand how runoff is calculated, how it affects design and construction, and how systems like flow wells are sized and installed to comply with city requirements.
Why Stormwater Runoff Control Is Required in Sandy Springs
Sandy Springs requires on-site stormwater management to:
- Prevent flooding on neighboring properties
- Reduce erosion and downstream impacts
- Protect existing infrastructure and waterways
- Ensure new development does not increase runoff beyond pre-development levels
This means that each homeowner must contain stormwater within their own lot boundaries, even during heavy rain events.
How Runoff Is Addressed in the Approved Site Plan
Stormwater requirements are not optional or negotiated later. They are reviewed and approved before a building permit is issued.
Your approved site plan will include:
- Pervious area calculations (surfaces that absorb water, such as grass or landscaping)
- Impervious area calculations (surfaces that do not absorb water, such as roofs, driveways, and patios)
- A stormwater management strategy that balances these areas
A qualified Sandy Springs home builder reviews these calculations early to ensure feasibility and avoid redesigns.
Pervious vs. Impervious Surfaces Explained
Impervious Surfaces
- Roofs
- Driveways
- Walkways
- Patios
These surfaces increase runoff and must be offset by approved drainage solutions.
Pervious Surfaces
- Lawns
- Landscaped areas
- Certain permeable paving systems
The ratio of pervious to impervious surfaces directly impacts the size and number of flow wells required on your lot.
What Are Flow Wells and Why Are They Used?
Flow wells (also called dry wells) are underground systems designed to:
- Collect roof and surface runoff
- Temporarily store stormwater
- Allow water to slowly infiltrate into the soil
In Sandy Springs, flow wells are one of the most common stormwater solutions used for new home construction.
Flow Well Sizing and Placement
Flow wells are not one-size-fits-all. Their design is based on:
- Roof area
- Total impervious surface
- Soil conditions
- Lot size and slope
Your site plan will include:
- The number of flow wells required
- The diameter and depth of each flow well
- The exact location on the lot
A professional custom home builder in Sandy Springs GA ensures these systems are installed exactly as approved to pass inspections.
Why Homeowners Cannot Rely on the City for Drainage
A common misconception is that the city will handle excess runoff. In Sandy Springs:
- Homeowners are responsible for managing runoff on their own property
- Discharging water onto neighboring lots is prohibited
- Non-compliant drainage systems can delay final inspections
This makes proper stormwater planning essential from the beginning of the project.
How a Sandy Springs Home Builder Protects You From Issues
An experienced Sandy Springs home builder will:
- Coordinate with civil engineers during site planning
- Review stormwater calculations before permit submission
- Ensure flow wells are installed per approved plans
- Avoid costly corrections during inspections
Skipping this expertise can lead to failed inspections, redesign costs, or post-construction drainage problems.
Communities We Serve in Sandy Springs
We regularly manage stormwater and site compliance for projects throughout Sandy Springs, including:
- Riverside
- North Springs
- Glenridge Hammond
- Hammond Hills
- Mount Vernon Woods
- High Point
- Heards Ferry
- Powers Ferry
Each neighborhood has unique lot conditions that affect drainage design.
Additional Services for Sandy Springs Homeowners
In addition to new home construction and site planning, we provide:
- Custom home building
- Major renovations
- Home additions
- Basement finishing
- Decks and outdoor living spaces
- Structural modifications
Proper stormwater planning is integrated into every project we manage.
Planning to Build a New Home in Sandy Springs?
Before construction begins, it is critical to understand how stormwater runoff will be handled on your property. Working with a knowledgeable Sandy Springs home builder ensures your project complies with city requirements and avoids unnecessary delays.