FAQ

Straight answers to retaining wall questions

Use these questions to prepare for a retaining wall project and compare proposals.

Concrete block retaining wall with gravel behind it.

For City of San Diego permit guidance, read Information Bulletin 220. Verify a contractor using the CSLB license lookup.

Cost and quotes

What affects the cost of a retaining wall?

Height, materials, site access, drainage, and any design or permits can affect the project scope. Ask the contractor for a written proposal that identifies what is included and what may change after excavation.

How can I compare proposals?

Give bidders the same plans and describe the same work. Compare excavation, drainage, disposal, restoration, design, permit responsibilities, and payment terms as well as the total.

Can part of a wall be repaired?

That depends on the wall and its condition. Ask a qualified professional to assess the affected section and explain whether the proposed repair addresses the cause as well as the visible damage.

Materials and drainage

How do wall systems differ?

Concrete masonry, natural stone, timber, and segmental concrete units use different materials and construction details. Ask which system the proposal identifies and how its design suits your site.

Does a leaning wall always need replacement?

A lean alone does not establish the cause or the right repair. Keep clear of a wall that appears unstable and ask a qualified professional to assess it before disturbing the soil.

What should I ask about drainage?

Ask how the proposed design manages water behind the wall, where it exits, and how the outlet can be maintained. The appropriate details depend on the wall and site.

Permits and planning

Will I need a retaining wall permit?

It depends on the wall and the jurisdiction. The City of San Diego lists height and other conditions in Information Bulletin 220. Other cities and unincorporated areas have their own processes. Check with the building department for the property address.

Who handles the permit and inspection?

Discuss the responsibility with the contractor and any design professional. Ask who will prepare plans, submit the application, pay fees, and arrange required inspections, then put the agreed scope in writing.

Is grading included in a wall proposal?

Do not assume it is. Ask whether excavation, grading, soil disposal, drainage, and restoration are included, and whether separate design or review is needed.

About the referral

Does Pro Wall SD build the wall?

Pro Wall SD is a referral service, not a licensed contractor. If you hire an independent contractor, discuss the work and terms directly with that contractor.

How can I check a contractor’s license?

Ask for the license number and verify it through the California Contractors State License Board. Check the record and classification against the work being proposed.

Who provides the project price?

Ask the independent contractor for a written proposal and clarify any charges before agreeing to a visit or work. Compare the scope and terms before choosing whom to hire.

Serving San Diego County

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Tell us about your project and we can discuss available local contractor options.