Pavers planning guide
Paver Patio Slope Guide: How Much Drop Away From the House?
Check common paver patio slope ranges, convert slope to total drop, and note drainage risks before estimating base materials.
Before you use this guide
This guide is a calculator companion. It explains typical planning inputs, unit conversions, and material estimate assumptions so you can use the related calculator with better context. It does not provide live prices, contractor quotes, building-code guidance, structural design, or product-specific installation instructions.
Quick answer
A common planning range for paver patio slope is about 1/8 inch to 1/4 inch of drop per foot, directed away from the house when the patio meets a foundation. The right slope also needs a place for water to exit without draining into a window well, low door threshold, or trapped corner.
Slope is not a separate material layer, but it changes the excavation and base plan. If one edge of the patio must be lower than the other, the gravel base and bedding sand still need enough compacted depth across the whole area.
Use the table below to translate slope into total drop before ordering gravel or sand. Then check whether the low side actually has a drainage outlet instead of sending water toward the house, a window well, a fence line, or a corner with nowhere to drain.
Paver patio drop by distance
Total drop equals distance multiplied by slope. Values are planning conversions, not local code or product installation requirements.
| Distance from high side | Drop at 1/8 in per ft | Drop at 1/4 in per ft | Planning note |
|---|---|---|---|
| 4 ft | 1/2 in | 1 in | Small patios still need a visible drainage direction. |
| 8 ft | 1 in | 2 in | Check door thresholds and steps before choosing the high edge. |
| 10 ft | 1 1/4 in | 2 1/2 in | The low side needs somewhere to release water. |
| 12 ft | 1 1/2 in | 3 in | Confirm the base depth remains adequate at both edges. |
| 16 ft | 2 in | 4 in | Longer runs may need more careful layout and grade checks. |
Many projects use a range rather than one universal number. Always confirm project-specific requirements and product instructions.
Drainage risk checklist before setting slope
| Condition | Why it matters | What to check next |
|---|---|---|
| Patio touches the house | Water should not be directed toward the foundation. | Confirm the high side, low side, and drainage outlet before excavating. |
| Window well or basement opening nearby | A low corner can send runoff toward the well. | Avoid creating a slope path into the well or trapped area. |
| Fence, wall, or raised bed on the low side | The low side may not actually drain. | Look for an open discharge path or alternate grading plan. |
| Door threshold is close to patio height | Slope and paver thickness can reduce clearance. | Check finished elevation before choosing base depth. |
| Existing patio has ponding | The issue may be slope, base settlement, or blocked drainage. | Use the sinking paver checklist before only adding joint sand. |
Example: 10 ft patio run away from the house
Inputs
- Distance from house: 10 ft
- Planning slope: 1/8 in per ft
- Base gravel: choose separately
- Bedding sand: usually planned separately
Estimated result
The low edge would be about 1 1/4 inches lower than the high edge before checking product instructions, thresholds, and drainage outlet.
Multiply 10 ft by 1/8 inch per foot. This slope conversion does not replace the gravel base or bedding sand estimate.
Example: 12 ft patio with a stronger 1/4 in per ft slope
Inputs
- Distance from high edge: 12 ft
- Planning slope: 1/4 in per ft
- Drainage outlet: low side must be open
Estimated result
The total drop would be about 3 inches across the 12 ft run.
A stronger slope can move water faster, but it may affect step heights, door clearance, and how much excavation is needed at each edge.
Slope does not fix a weak base
A patio can have visible slope and still sink if the base is too shallow, poorly compacted, or holding water. Check base depth and drainage together before ordering material.
Turn the slope plan into a material list
Plan gravel base, bedding sand, paver count, edge restraint, joint sand, and bag versus bulk material options.
Related resource paver patio material checklistTurn dimensions, base depth, slope, pavers, edge restraint, joint sand, and overage into a practical material list.
Related resource paver base gravel and sand calculatorEstimate gravel base, bedding sand, cubic yards, tons, bags, overage, and optional user-entered material cost.
Related resource paver base depth decision guideChoose a planning base depth before estimating gravel, sand, overage, and project material quantities.
Related resource sinking paver symptom checklistMatch sinking, rocking, low edges, washout, and joint gaps to likely base, drainage, or restraint problems.
FAQ
How much should a paver patio slope away from a house?
A common planning range is about 1/8 inch to 1/4 inch per foot, but the right value depends on the project, drainage outlet, product instructions, and local requirements.
What is the total drop for 1 inch over 4 feet?
One inch over 4 feet is the same as 1/4 inch per foot. Over a 12 foot run, that rate would produce about 3 inches of total drop.
Can a paver patio slope toward a window well?
Avoid planning runoff into a window well or other trapped low area. Check where water will exit before setting the final high and low edges.
Does slope change how much paver base I need?
Slope can change excavation and finished elevations, but gravel base and bedding sand should still be estimated as separate compacted layers across the project area.