How to Build a Paver Landing for Deck Stairs
Build the landing as an independent, drained paver pad: check local stair and landing rules, set the finished height before digging, compact crushed aggregate in lifts, screed a thin bedding layer, and install exterior-rated pavers with edge restraint. Keep the stairs on their own code-compliant supports, then verify slope, drainage, and the first riser.
A warm terracotta paver can make a deck entry feel finished, but a beautiful color will not hide a landing that settles or leaves a troublesome first step. The key is to plan the finished height before you dig. That one measurement ties together the landing, drainage, and stair safety.
Inspect Soil, Drainage, Stair Support & Landing Elevations
A paver landing is a small paved surface that gives you a stable place to step off the stairs. It needs a firm, compacted base and a planned slope, while the deck stairs need their own supports. Check local rules before setting the landing size or height.
Start by looking at the ground around the stair foot. Remove loose debris and note soft soil, standing water, downspouts, and any route that could carry water toward the house. If the soil is wet, pumps underfoot, or will not compact, do not cover it with fabric and hope for the best. Correct the drainage problem or get qualified help.
Check that the stairs and their footings appear sound and are supported independently from the future paver pad. The landing must not carry the stair stringers or become a substitute footing. Local code and frost conditions govern stair support and footing depth, so verify those requirements with your building department.
Before excavation, mark the landing outline and choose the paver pattern. Measure from the planned finished landing surface to the first tread, not from the current soil. Under the IRC baseline, a landing is generally at least as wide as the stairs and 36 inches deep in the direction of travel. Confirm the edition adopted locally and any exceptions.
The finished surface also affects stair geometry. IRC baseline stair rules limit riser height to 7¾ inches and the difference between the tallest and shortest risers in a flight to ⅜ inch. Check local requirements before changing the landing elevation; a small height change can make the bottom riser too tall or too short.
| Planning check | Baseline or practical target | What to confirm |
|---|---|---|
| Landing width | At least stair width | Local code and stair layout |
| Landing depth | 36 in. in direction of travel | Adopted code and exceptions |
| Riser height | Maximum 7¾ in. under IRC baseline | Finished landing to first tread |
| Riser variation | No more than ⅜ in. under IRC baseline | Compare risers in the flight |
| Landing slope | About 1% away from the structure | Drainage and any accessibility rules |
Build the Compacted Base and Set Pavers Precisely
The base is the compacted, free-draining crushed aggregate beneath the pavers. A thin bedding layer sits above it to help set the units evenly. Together, these layers support the landing; loose sand, topsoil, and decorative gravel do not provide a reliable substitute.
Work out the excavation depth from the paver thickness, roughly 1-inch bedding layer, and the base depth required for your soil, climate, and project specification. There is no single base depth that suits every site. Ask your local supplier or building official about local conditions, especially where frost or poor soil is a concern.
Remove sod, roots, topsoil, and soft or wet material. Shape the subgrade so water can move away from the deck and house. If fine-grained soil is likely to mix into the aggregate, place a suitable geotextile separator on the prepared subgrade. Fabric can separate materials, but it does not drain a wet site or replace compaction.
Place suitable dense-graded crushed aggregate in controlled lifts and compact each lift before adding the next. For small plate-compactor work, a loose lift around 2–3 inches is a practical limit. Project specifications may require more. Where specified, compact suitable granular base to at least 95% of ASTM D698 Standard Proctor maximum dry density; a hand test alone cannot confirm that percentage.
Screed a consistent bedding layer, typically about 1 inch, over the compacted base. Do not use extra bedding sand to fix a base that is too high, too low, or uneven. Lay the pavers in the planned pattern, keeping the intended slope and cutting edge units cleanly. Install an edge restraint suited to the paver system so the paved field cannot spread.
Choose exterior-rated pavers suitable for freeze-thaw exposure where that applies. For concrete paving units, check for applicable ASTM C936 compliance. Use bedding and joint materials approved for the pavers. Do not use tile mortar or adhesive with a flexible aggregate-base installation.
Detail Stair Transitions, Landing Slope & Safety Clearances
The stair-to-landing transition is where a minor height error can become a trip concern. The finished landing surface determines the bottom riser height, while the landing’s slope controls where water flows. Set both before laying pavers, then check them again once the surface is complete.
Aim for about 1% slope away from the deck or house, which is about ⅛ inch of fall per foot. Keep water away from the foundation and avoid directing it onto a route where it could create icing. Where applicable accessibility rules require a level landing, do not exceed a 2% slope; check the rules that apply to your project.
Do not assume the stair foot and landing can be pressed tightly together and stay even forever. The stairs are independently supported, while the paver base can settle if the subgrade is soft or the base is thin or poorly compacted. That movement can change the first riser height or leave a gap beside the stairs.
After laying the pavers, measure the first riser from the finished landing to the tread using the method required by local code. Check the other risers in the flight as well. If the first step falls outside the allowed height or the flight no longer meets uniformity rules, stop and correct the elevation rather than accepting the mismatch.
Maintain Joints, Edge Restraint & Long-Term Drainage
Joint material fills the spaces between pavers, and edge restraint keeps the paver field from moving outward. Neither one fixes a weak base. A well-prepared landing stays more stable when the base, restraint, and drainage all work together.
Follow the paver maker’s instructions for compacting the finished surface. Use equipment and a protective pad suitable for the paver type, then sweep compatible jointing material into the joints and repeat if the instructions call for it. Check that pavers do not rock and that the edges remain restrained.
A common source of trouble is water collecting near the deck after installation. Recheck the surface with a level or straightedge and observe where water runs during rain or a controlled water test. If it ponds against the structure, correct the slope or surface before treating the landing as finished.
Field example: On deck stair jobs I have worked on, the most frustrating callbacks often start with a landing that looks level but was built over soft soil. The stairs remain in place while the paver pad settles, changing the first step. The fix is to address the soil and rebuild the base, not to pack joint sand into the gap or brace the landing against the stair stringers.
Field example: I also plan the bottom riser before choosing the final paver elevation. A thicker paver or an unplanned layer of bedding can raise the landing enough to affect that step. Measuring from the finished surface early helps prevent a last-minute cut or a stair adjustment.
Conclusion: Check the Finished Landing Before Use
A safe, neat paver landing depends on more than a level-looking surface. Confirm the code rules, prepare stable soil, compact aggregate in lifts, set the slope, and keep stair support independent. Finish by checking drainage, paver movement, edge restraint, and the first riser before using the stairs.
Final check before opening the stairs:
- Landing meets locally required width and depth.
- Pavers are stable, with no rocking units or spreading edges.
- Surface drains away from the house and does not pond.
- The first riser and the rest of the stair flight meet local limits.
- Stairs are supported independently from the paver landing.
Frequently Asked Questions
These answers cover common choices and checks for a paver landing at deck stairs. Local code, soil, climate, and paver instructions can change the details, so treat the measurements below as baselines to verify rather than a replacement for local requirements.
How deep should a paver base be?
There is no universal depth. It depends on soil, climate, paver type, and local requirements. Remove unsuitable soil and confirm the base design before excavation.
Can I put pavers directly on dirt?
No. Topsoil and loose or uncompacted soil are not a stable base. Prepare the subgrade and install compacted crushed aggregate with a bedding layer.
Can I build the landing against the stair stringers?
Do not use the pavers or their base to support the stairs. Keep the stair supports independent and follow local footing and frost-depth rules.
Does landscape fabric replace a compacted base?
No. A suitable geotextile can separate fine soil from aggregate, but it does not replace compaction or solve poor drainage.
How much slope should the landing have?
About 1% away from the house is a practical target. Where accessibility provisions apply, verify their limits; a 2% maximum may apply to a level landing.
Can I use mortar between the pavers?
Not for a flexible aggregate-base system. Use jointing material approved for the pavers and installation method.
What landing size should I plan for?
The IRC baseline generally calls for a landing at least as wide as the stairs and 36 inches deep in the direction of travel. Check local code and exceptions.
How do I check the bottom riser?
Measure from the finished landing surface to the first tread, then compare it with local stair rules and the other risers in the flight. Don’t measure from unfinished soil.
(This article was written by one of our staff writers, David Chen. Visit our Meet the Team page.)