Use this guide to prepare the location, scope, access, and timing questions for providers you locate independently. Call to record retaining-wall project interest with the site owner. No retaining-wall contractor is currently attached, and the call does not provide an estimate, arrange service, or confirm provider response timing.
Drainage must follow the site-specific design
Water and soil conditions can contribute to retaining-wall loads and movement, but this page cannot diagnose a wall or prescribe one universal assembly. Ask the responsible designer and contractor to document:
- Inputs. Surface and subsurface water, soil and geotechnical information, retained and exposed geometry, slopes, tiers, materials, structures, roadways, utilities, and other surcharge loads.
- Drainage components. Any aggregate, geotextile, drain, weep, waterproofing, subdrain, or other component required by the selected system and design.
- Discharge path. Where water may lawfully go, capacity and erosion controls, easements, neighboring-property constraints, maintenance access, and responsible-party approvals.
- Construction and verification. Excavation, foundation or base, backfill, compaction, testing, inspections, as-built records, maintenance, and final certification when required.
Do not copy a generic gravel, fabric, pipe, or daylight detail into an unseen lot. The chosen system, design professional, manufacturer instructions, geotechnical findings, and Lehi City requirements should control the written plan.
Site soils and drainage shape the design
Some Lehi and Utah County lots may contain expansive or clay-heavy soils, and seasonal freezing and thawing can affect a wet wall. A site-specific soils and drainage review should determine whether gravel, filter fabric, a drain line, regrading, or reinforcement are appropriate. If a wall is moving, see the wall repair guide.
When a wall needs an engineer and a permit
Lehi adopted dedicated retaining-wall requirements in Development Code Chapter 12-C on August 26, 2025. The chapter's applicability and possible exemptions depend on several facts, not one footing-to-top height:
- Record distinct measurements. Retained-fill height, exposed height of each tier, exposed surface area, tier count and spacing, and nearby slopes are separate inputs.
- Identify loads and materials. Structures, roadways, other surcharges, and rock, boulder, or organic wall systems affect the review path.
- Document site-specific design questions. Drainage, geotechnical information, calculations, drawings, easements, property lines, and utilities may matter to the submittal.
- Confirm the current City path. Only Lehi City can determine whether the specific wall follows a permit path or fits a stated exemption; a provider or this site cannot make that determination.
Use Chapter 12-C and Lehi's current Building and Inspections guidance, then take the known geometry, loads, materials, and unanswered questions to the City and an appropriately licensed design professional before work begins. A later City amendment supersedes this summary.
What do drainage and engineering cost in Lehi?
Fee structures vary by professional, contractor, authority, system, review path, site information, revisions, and construction scope. This site does not assume engineering is flat-fee, drainage is priced by length, a City fee scales in one way, or retrofit work always costs more.
| Item | What to confirm |
|---|---|
| Design and geotechnical services | Discipline, deliverables, assumptions, revisions, site visits, tests, certification, and fee terms |
| City review and permit | Current applicability, submittals, reviews, inspections, and official fee schedule |
| Drainage and wall construction | Designed components, quantities, access, sequencing, testing, maintenance, and quote |
| Existing-wall investigation or repair | Access, demolition, temporary support, diagnosis limits, design, restoration, and change orders |
A written proposal should separate professional services, City charges, construction, testing, access, taxes, contingencies, exclusions, and schedule. No official Lehi price schedule is reproduced here.
Compare complete, site-specific terms from professionals and contractors you locate independently. The call line only records retaining-wall project interest with the site owner; it does not request an assessment or estimate.
How to vet any builder on drainage
Ask each provider you locate independently to document the same questions:
- Which drainage method and outlet are proposed, and who verifies that discharge is allowed?
- Who records retained-fill height, exposed tier height and area, tier spacing, nearby slopes, and surcharge loads for City review?
- Who provides any required site-specific design, geotechnical information, calculations, drawings, and final certification?
- Who handles permit, preconstruction, inspection, testing, easement, utility, and property-line coordination?
- Which licenses, insurance, bonds, warranties, exclusions, and change-order terms apply?
Verify the current Chapter 12-C path with Lehi City. This page cannot label a wall exempt or approve a design.
Lehi drainage & engineering questions, answered
Do I really need a permit for my retaining wall?
Do not decide from one height measurement. Lehi Chapter 12-C uses retained fill, exposed tier height and area, tier spacing, nearby slopes, materials, and supported structures, roadways, or other surcharges in its applicability and possible-exemption screens. Record each fact separately and ask Lehi City to confirm the current path.
Why can retaining walls move or show distress?
Possible contributors include water, soil behavior, foundation or base conditions, geometry, slopes, surcharge loads, materials, design, construction, erosion, utilities, impact, and maintenance. A site-specific investigation should identify evidence and limits before a repair is prescribed; this page does not diagnose the cause or specify gravel, fabric, pipe, outlet, reinforcement, or geogrid.
What is geogrid and do I need it?
Geogrid is one possible reinforcement component in some wall systems. This page cannot determine whether it is permitted, required, or sufficient for a project. Ask the responsible design professional to connect any proposed product, placement, length, layers, and installation details to the site information, approved design, and manufacturer's documents.
Can drainage be added to a wall that's already built?
An existing-wall investigation may identify drainage work as one option, but access, demolition, temporary safety measures, restoration, design, approvals, and unresolved conditions are site-specific. Ask professionals you locate independently to document alternatives and limitations; this page does not prescribe a retrofit or rank its cost against new construction.
How much does engineering add?
This site publishes no engineering price. Scope and fees depend on the wall, site information, design discipline, calculations, drawings, revisions, inspections, and certification. Ask design professionals you locate independently for written terms and use Lehi City's current fee schedule for City categories; do not infer a requirement or exemption from price or height alone.
Can an independent provider serve areas outside Lehi?
No retaining-wall contractor is currently attached to this site. If one is selected later, verify its capabilities, service area, credentials, timing, and price directly before engagement; this call does not arrange service.