# How long does it take to build a retaining wall?

> How long does it take to build a retaining wall in San Diego? What sets the time for design, soils reports, permit review and the build. Plan your schedule.

URL: https://batterlinesandiegoretainingwalls.com/guide/retaining-wall-construction-timeline/

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The steps between a first measurement and a final inspection, which ones depend on the wall and which on the agency, and where San Diego's permits, weather and brush rules fit.

Last Updated: October 27, 2026

**Short answer:** How long it takes to build a retaining wall depends more on what comes before construction than on the building itself. A short wall that needs no permit is mostly digging, building and backfilling. A permitted wall adds design, possibly a soils report, plan review and four inspections, and coastal or hillside lots can add discretionary review.

**Key takeaways:**

- The building is usually the shorter part; design, reports and permit review set most of the schedule.
- City walls built to the standard drawings skip engineering and are eligible for Rapid Review (IB 220).
- Engineered walls add design time, special inspections and sometimes a geotechnical report before design can finish.
- City and County standard walls get four inspections, and each one has to pass before the next stage is covered up.
- About 83% of the year's rain falls from November through March, so dry-season construction avoids building against saturated backfill.

How long does it take to build a retaining wall? The honest answer is that construction is often the shorter part of the schedule, and the steps before it, design, reports and permit review, decide most of the calendar. Those steps vary with the wall and the lot far more than the building does. Drawing on the City and County rules that [Batterline San Diego Retaining Walls](https://batterlinesandiegoretainingwalls.com/) works within when it offers and manages [new retaining walls](https://batterlinesandiegoretainingwalls.com/retaining-wall-installation/) and [replacements](https://batterlinesandiegoretainingwalls.com/retaining-wall-replacement/) across San Diego County, this guide lays out the sequence so you can see which stages apply to your wall and what sets their length. It doesn’t promise durations, because agency review times and site conditions change them.

## The stages at a glance

| Stage | Applies when | What sets its length |
| --- | --- | --- |
| Site visit and measurement | Always | Access to the wall and records |
| Overlay and permit check | Always | How many maps and overlays touch the lot |
| Soils report | Required by the City, County or engineer | Drilling, lab testing and analysis |
| Design | Engineered walls; standard walls use City or County drawings | Wall complexity and the soils data |
| Discretionary permits | Coastal, steep-hillside, over-height or open space work | Notices, hearings and possible appeals |
| Building permit review | Walls over the permit triggers | Agency workload; Rapid Review for City standard walls |
| Construction and inspections | Always | Excavation, access, weather and inspection scheduling |

## Stage 1: measure the wall and check the lot

The first visit measures the wall’s length, its exposed height and its height from the top of the footing, notes the wall type and any lean, bulging or cracks, checks drains, weep holes and irrigation, and records what sits above it, how the work can be reached and any old permits or plans. Then the lot is checked against the rules that decide the permit path: the agency for the address, the 3-foot and surcharge triggers, the parcel’s geologic hazard category, and overlays such as the Coastal Overlay Zone, environmentally sensitive lands, a historic district or brush management zones.

That check decides which of the later stages exist. The [retaining wall permit guide](https://batterlinesandiegoretainingwalls.com/guide/retaining-wall-permit-san-diego/) sets out every trigger.

## Stage 2: soils report and design

A wall that fits the City’s standard drawings (IB 221) or the County’s (PDS 083 and 084) skips this stage, which is one reason those walls move faster. Everything else is designed by a California-licensed civil or structural engineer or architect, and the [engineer guide](https://batterlinesandiegoretainingwalls.com/guide/do-i-need-an-engineer-for-a-retaining-wall/) explains when that applies.

Some walls need a geotechnical investigation first. In the City, a wall over 6 feet, or a surcharged wall, in mapped fault, landslide, slide-prone, liquefaction or unstable-bluff categories needs one (SDMC Table 145.1803), and the Building Official can ask for one wherever a hazard is suspected. The report comes before the design, because the engineer designs from its numbers, so on those lots it sits squarely on the critical path.

## Stage 3: discretionary permits

Some lots need approvals that are decided on findings rather than issued over the counter, and these are the least predictable part of any schedule:

- **Coastal Development Permits** for coastal development in the Coastal Overlay Zone, including any wall between the shoreline and the first public road, which goes through appealable Process Three (SDMC 126.0702, Table 142-03A).
- **Neighborhood or Site Development Permits** for encroaching into steep hillsides or other environmentally sensitive lands (SDMC 143.0110).
- **A Neighborhood Development Permit** for a wall up to 20% over its zoning height (SDMC 142.0350).
- **Grading permits** where excavation or fill exceeds 5 feet, or any grading in City open space, with plans by a civil engineer (SDMC 129.0602).

Bluff lots carry the most of these, as the [coastal bluff guide](https://batterlinesandiegoretainingwalls.com/guide/coastal-bluff-retaining-walls/) explains.

## Stage 4: building permit review

City of San Diego applications are submitted electronically through the City’s online portal, with a site plan showing the wall’s length and height, its distances to structures, slopes and property lines, and where its drainage goes (IB 220). Plan check fees are paid at submittal and inspection fees at issuance. Walls built to the City’s standard drawings are eligible for Rapid Review. Engineered walls go through full plan check, and corrections from the reviewer add rounds. Unincorporated County walls go either over the counter or through plan check, which is reflected in their fees; the [cost guide](https://batterlinesandiegoretainingwalls.com/guide/retaining-wall-cost-san-diego/) lists both.

## Stage 5: construction and inspections

Before digging, utilities are marked through DigAlert, the regional 811 center, and excavations 5 feet or deeper that workers must enter need the employer’s Cal/OSHA permit. Then the build follows the wall type, with inspections built into it.

A grouted block wall built to the City’s standard design runs:

1. **Excavate and set steel** for the footing. Footing inspection, before concrete.
2. **Pour the footing**, then lay the block with steel in place. Pre-grout inspection, before grout; grout pours over 5 feet need cleanouts.
3. **Grout the wall**, then place the drain and gravel. Backfill and drainage inspection, before earth backfill.
4. **Backfill in compacted lifts**, cap and grade the top so water runs away from the wall. Final inspection.

Engineered walls add the special inspections their plans call for. A segmental wall follows a different sequence: excavation to the designed geometry, a leveling pad, a precisely set base course, drainage aggregate and drain, compacted backfill in lifts with geogrid at the specified levels, the cap and final grading. Poured walls add forming and curing, and footing concrete is specified by its strength at 28 days, so the design, not the calendar, says when the wall can be loaded.

Each inspection is a hold point. Work stops until it passes, which is why scheduling inspections promptly matters as much as the crew’s pace, and why a failed inspection costs time as well as rework.

## What else moves the schedule

- **Weather.** About 83% of the year’s rain falls from November through March at Lindbergh Field, El Cajon and Ramona. Building in the dry months avoids wet trenches and saturated backfill.
- **Brush rules.** On canyon lots, brush management is restricted in coastal sage scrub and chaparral from March 1 to August 15 except as consistent with the MSCP Subarea Plan (SDMC 142.0412), which can affect when clearing for access happens. The [canyon lot guide](https://batterlinesandiegoretainingwalls.com/guide/retaining-walls-on-canyon-lots/) covers this.
- **Access and demolition.** Hand-carry access, removing an old wall and hauling soil all add days that equipment access would save.
- **Materials.** Imported gravel and backfill, especially on clay sites, have to be delivered and staged.

## Planning your wall’s schedule

The fastest wall is one whose permit path is settled before anyone draws it. Call [(619) 374-2499](tel:+16193742499) or [ask for an estimate](https://batterlinesandiegoretainingwalls.com/contact/) with the address, the wall’s length and height and a photo of what sits above it; the estimate lists which of these stages your wall is likely to need. The [guide to preparing your yard](https://batterlinesandiegoretainingwalls.com/blog/preparing-your-yard-for-wall-work/) covers what to do before work starts.

**In this guide:**

- The stages at a glance
- Stage 1: measure the wall and check the lot
- Stage 2: soils report and design
- Stage 3: discretionary permits
- Stage 4: building permit review
- Stage 5: construction and inspections
- What else moves the schedule
- Planning your wall’s schedule

**Get an Estimate:**

For new retaining walls across San Diego County.

Get an Estimate

## More questions on this

### Can retaining wall concrete be poured in cold or wet weather in San Diego?

Cold is rarely the limit near the coast, where NOAA normals show no freezing nights at Lindbergh Field; Ramona averages 27.7 a year, so inland pours deserve more care. Rain matters more: wet footing trenches, saturated backfill and grout pours in a storm all cause problems. Footing concrete is specified by its strength at 28 days, and the design sets when loading and backfill can follow.

### Can backfill go in before the drainage inspection?

No, not on a permitted wall. On City standard walls, the backfill and drainage inspection happens after grouting with the wall drains in place, and earth backfill comes only after it passes (IB 221). County standard walls follow the same order. Backfilling early buries the drain and gravel the inspector needs to see, and can mean digging them out again.

### Do underground utilities need to be marked before a retaining wall is dug?

Yes. Every footing excavation needs a ticket through DigAlert, Southern California's 811 center, so utilities can mark their lines before digging starts. Build the call into the schedule ahead of the excavation date, and check that the ticket is still current if the start date slips, since tickets expire.

## Where to go next

### The service behind this guide

- [New Retaining Walls](https://batterlinesandiegoretainingwalls.com/retaining-wall-installation/) Retaining wall installation in San Diego, from survey and wall choice to permit, footing, drainage, compacted backfill and inspection.

### Related guides

- Learn [Do you need a permit for a retaining wall in San Diego?](https://batterlinesandiegoretainingwalls.com/guide/retaining-wall-permit-san-diego/) Every trigger the City of San Diego and the County use, from the 3-foot rule and surcharge loads to engineering, soils reports, coastal permits, zoning heights, licensing, fees and inspections.
- Cost Guide [How much does a retaining wall cost in San Diego?](https://batterlinesandiegoretainingwalls.com/guide/retaining-wall-cost-san-diego/) Typical San Diego-area ranges for each wall type, what sits inside the price, the permit fees the City and County publish, and three worked budgets.
- Decision Guide [Do I need an engineer for a retaining wall?](https://batterlinesandiegoretainingwalls.com/guide/do-i-need-an-engineer-for-a-retaining-wall/) Structural versus decorative walls, the narrow case the City's standard drawings cover, what a structural engineer and a geotechnical engineer each do, and what engineering adds to the budget.
- Learn [Can you build a coastal bluff retaining wall in San Diego?](https://batterlinesandiegoretainingwalls.com/guide/coastal-bluff-retaining-walls/) What the City of San Diego, Encinitas and Solana Beach allow near a bluff edge, why bluff work is engineered and permitted case by case, and which parts of it sit outside ordinary residential wall work.
- Learn [What changes when you build a retaining wall on a San Diego canyon lot?](https://batterlinesandiegoretainingwalls.com/guide/retaining-walls-on-canyon-lots/) The fire, hillside, open space and geology rules that apply where a San Diego yard meets a canyon, and who is responsible for the slope below the fence.