Three different walls, one bid question

A search for block versus poured retaining walls currently returns national how-to pages about cost and speed. Those pages are not San Diego permit documents. The useful local question is which system matches the retained soil, the drainage, and the reviewing agency, not which material looks cheapest in a screenshot.

We do not publish installed prices. No CSLB, City, or County source gives a defensible San Diego rate per foot for these systems.

Segmental block

Segmental retaining wall units stack without mortar. They usually batter back slightly with each course. Taller or loaded walls often need geogrid and a design that names the exact unit. That is a different system from grouted CMU. See CMU block retaining walls and segmental systems.

Inside City limits, a wall over three feet from the top of the footing, or a wall with surcharge or steep backfill, follows Information Bulletin 220. The City’s standard masonry drawings in Information Bulletin 221 are for grouted CMU, not a generic dry-stack catalog. The City’s published 221 URL uses a misspelled folder (information-bulletain); ask Development Services for the current bulletin.

Poured concrete

Cast-in-place concrete is formed, reinforced, and poured on site. It can take custom shapes. Repair is a different job from restacking block. Access for forming and a concrete truck matters as much as the finished face. Ask the bidder who designs the wall and whether the proposal includes drainage, the footing, and permit drawings.

Boulder and stone

A boulder or dry-stone wall is a custom gravity or stacked assembly, not a numbered masonry unit. Drainage often moves through the gaps, but that is not a substitute for a designed outlet on a permitted retain. Once the wall needs a permit, treat it as a custom structure. See natural stone retaining walls and boulder cost.

How to compare bids

Ask each bidder to name the system in writing: segmental, grouted CMU, poured concrete, or stone. Ask what the wall holds, where water leaves, and which drawing or engineer governs the height. City standard designs may not retain expansive soils. That is a site finding, not a neighborhood label.

Wall Pro SD connects homeowners with licensed local crews. Call (858) 400-4639.

See concrete block retaining walls and natural stone retaining walls.