Grading around a foundation is a water-routing project, not simply a project to add dirt beside the wall. The plan needs to consider where water starts, how it travels and where it can discharge while preserving the building’s relevant clearances and access.
Before accepting a proposal, ask for a drawing that shows both the problem area and the receiving area. Moving water from one low spot to another may not meet the intended goal.
Observe existing flow paths
Photograph accessible low areas after rain and note where water first arrives. Mark downspouts, paved surfaces, beds and neighboring slopes on a sketch. Tell the provider about recent work that changed the landscape.
OSU Extension discusses grading as a contributor to drainage performance. This supports evaluating the site shape rather than choosing a fill quantity before establishing the route. OSU Extension: Addressing Drainage Issues in the Urban Landscape (2020)
| Planning item | Information to request | Concern to resolve |
|---|---|---|
| Existing levels | Relevant survey or measurements | Where water currently goes |
| Proposed levels | Finished grading plan | Where water will go afterward |
| Building clearances | Features that must remain exposed | Avoid burying access or details |
| Receiving area | Outlet and applicable requirements | Avoid transferring the problem |
| Adjacent paving | Transitions and drainage | Prevent new low spots |
| Surface restoration | Material and establishment scope | Define the finished condition |
| Maintenance | Areas to observe | Detect erosion or later changes |
Ask for measured design reasoning
A statement that the ground will slope away is a starting objective, not a complete plan. Ask how the proposed levels work with doorways, walks, retaining features and the available site. Request any relevant local review rather than treating an online slope number as universal code.
Building Science Corporation includes hardscape slope and site water management in its below-grade guidance. For an existing home, ask how those principles can be applied within the property’s constraints. Building Science Corporation: Below Grade Water Management (2024)
Where space is restricted, the provider should explain the alternative collection or drainage measure and its outlet.
Avoid burying building features
Point out visible siding edges, openings, vents, access points and existing drainage details. Ask the contractor to identify required clearances for the construction and jurisdiction before fill is placed.
Do not assume that raising a bed against the wall is harmless because it hides a depression. The finished plan should preserve inspection and maintenance access and state what changes are needed to adjacent landscape features.
Coordinate with other work
If downspouts, paving or retaining features also need work, identify the order and responsible provider. A grading plan can be undermined by a later patio or bed that blocks its route.
Ask whether utilities or irrigation affect excavation and what preparation is required before work. Specify the restoration boundary and any owner-arranged planting so the final water path remains clear.
Compare the full scope
Request the material, preparation, finished levels, surface treatment and cleanup included. Ask how unexpected conditions will be evaluated and priced. A quote based only on truckloads does not describe the completed drainage result.
Before accepting the work, walk the route with the provider and compare it with the plan. Obtain photographs and the final drawing. Ask what follow-up after rain is appropriate and who addresses a problem within the agreed scope.
Maintain the finished route
Keep outlets and intended surface paths unobstructed. Record later landscaping changes and inspect accessible areas for erosion or new ponding. Ask for professional advice if the route stops performing as intended.
If foundation symptoms continue, do not assume grading has failed or that it was the only necessary work. Provide the completed scope to the building evaluator so the structural and water observations can be considered together.
Frequently Asked Questions
Can I fix drainage by adding soil against the house?
Not without considering the full route and building details. Ask for a site-specific plan that preserves required clearances.
Is one slope measurement enough?
The route must work across the relevant area and at transitions. Ask how the proposed levels were established and checked.
Will grading reverse settlement?
A drainage objective is not a structural repair promise. Ask the evaluator what further building assessment or monitoring is appropriate.
Related Services
Visit foundation repair or request an assessment.
Research Sources
Sources reviewed September 6, 2026. Inspection and quote questions are an editorial checklist; actual repair requirements depend on the property.