Design decision
Why this idea works
Driveways shed a lot of water, and a planted inlet at the edge diverts that runoff into a garden basin where it can soak away and feed planting. It eases the load on the street drainage and puts the water to use, turning the driveway edge into a small piece of green infrastructure rather than a chute to the gutter.
- The tradeoff
- The layout sets a clear direction, but it also commits the project to fixed relationships. Grade the inlet and basin to the driveway runoff and detail the slab edge.
- How to measure it
- Conceptual range: the driveway edge plus a separately measured planted inlet and basin.
On your property
Plan it for your site
Detail the driveway edge so runoff is guided cleanly into the inlet without undercutting the slab, and grade the basin to receive and hold the flow. Plant the basin with species that tolerate periodic water and help it soak away.
- Detail the driveway edge so runoff enters the inlet without undercutting the slab.
- Size the basin and an overflow for heavy driveway runoff.
- Plant it with species that tolerate periodic water and aid infiltration.
Before forms are set
Build implications
- Confirm before estimating A slab edge that feeds the inlet.
- Confirm before estimating A basin and overflow sized for driveway runoff.
- Confirm before estimating Infiltration-friendly, water-tolerant planting.
- Measure the site and establish elevations Record boundaries, thresholds, grade changes, utilities, and the dimensions of vehicles, furniture, equipment, or structures that affect the layout.
- Test how the space will be used Check walking routes, turning paths, door swings, working clearances, maintenance access, and the route back to the house or street.
- Resolve drainage, services, and structural support Decide where water goes and coordinate drains, conduit, irrigation, fuel, electrical work, footings, and independent supports before forms are set.
- Define and estimate each concrete element Confirm the slab or footing section, base, joints, edges, and finish, then estimate simple measurable fields separately from steps, walls, drains, and supported features.
Prevent these problems
- Calling a retaining element decorativeA wall or planter that holds soil or water needs support, reinforcement, drainage, and often professional review.
- Hiding runoff with plantingA rain garden, swale, or planted edge must receive water intentionally and have a safe overflow route.
- Choosing the finish before defining the jobSeat walls, planters, edging, terraces, and retaining walls may look related but carry very different loads and details.
Next step
Turn the idea into your estimate
Enter measurements from the property. The conceptual image does not provide a takeoff.
Estimate a similar concrete featureQuestions this idea raises
What is a planted driveway inlet?
An opening at the driveway edge that guides runoff into a garden basin to soak away, easing street drainage and watering planting. It turns the edge into green infrastructure.
Will the basin overflow in a storm?
A well-designed basin has an overflow path for heavy storms so it does not back up onto the driveway. Size the basin and overflow to real runoff.
- Best when
- Drainage-aware features
- Reconsider when
- Reconsider the idea if retained soil or water, footing and reinforcement needs, drainage, and long-term access cannot be resolved on the property.
- Verify first
- Grade the inlet and basin to the driveway runoff and detail the slab edge.
- Professional input
- Landscape or concrete contractor; engineer for retaining or structurally loaded work
Sources and further reading
- American Concrete InstituteTechnical context for seat walls, planters, and small structural concrete elements.
- EPA: Types of Green InfrastructureContext for rain gardens, planted swales, and water-aware transitions beside concrete.
- NRMCA CIP 6: Joints in Concrete Slabs on GradeA starting point for jointing terraces, landings, and larger flat features.
