Civil / Site

Grading & Drainage

Engineering for ground elevations and the paths water takes across a property.

What this covers

Understanding Grading & Drainage

Grading design considers the site as a whole: buildings, neighboring ground, surface flow and the point where water leaves the property. A survey with elevations helps establish the conditions before changes are proposed.

When engineering may be required

When to involve an engineer

An engineer may be needed when changing site levels, adding paved areas or addressing water flow that affects a building or nearby property.

Confirm the engineering scope with the professional you engage and any permit requirements with the local building department.

Engineering tasks

What the engineer may review

Topics that may be relevant to the review: French drain, detention pond, retention pond and stormwater.

The engineer can review existing conditions, evaluate the proposed changes and prepare the calculations or design details included in the agreed scope.

Common projects

Project examples

  • Setting ground levels around a proposed addition
  • Planning how surface water will leave a paved area
Deliverables

Documents to discuss

These documents may be relevant to the work. Agree on the deliverables with your engineer and confirm any submission requirements with the reviewing authority.

  • drainage plan
Requesting a quote

What to have ready

Start with a short description. These details can help define the scope, but you do not need everything ready to request a quote.

  • The project city or county, and the property address if known
  • What you want to build, change or repair
  • How the space or site is used now and what you plan to change
  • Whether you have drawings or photos to share during follow-up
  • The status of any permit application and comments received
  • Your target dates or other scheduling constraints
Related services

Related engineering services

Related work and terminology

Terms you may see on plans and permits

Terms that may appear in plans, permit comments or contractor conversations about this work.

  • French drain
  • detention pond
  • retention pond
  • stormwater
Find help near me

Grading & drainage near me

Choose the project location to explore local information and request a quote.

Request an engineering quote

Tell us about the project and where it is located. You do not need to know which engineering discipline applies.