Retaining Wall Engineer for BC Owners: Compare Proposal Scope

Compare retaining-wall proposals by separating engineering commitments from installation credentials: Builtex lists engineering services, while Back40 reports installer training and designations—not interchangeable scopes.[1][5] For your property, ask each proposal to identify design inputs, deliverables, permit responsibilities, construction reviews and completion records.

Compare Builtex’s services with Back40’s credentials

Builtex Engineering Group Ltd.

• Role and coverage: Builtex describes itself as a structural-engineering provider for residential and light-commercial projects throughout BC’s Lower Mainland.[1]
• Engineering deliverables: It lists retaining-wall design, structural drawings for permit applications and Schedule B Letters of Assurance as separate services.[1]
• Construction role: Ask which reviews would be included for your wall.

Back40 Landscaping

• Role and coverage: Back40 is a landscaping and retaining-wall installer with an Abbotsford, BC address, and its page describes installation expertise.[5] Confirm that it serves your area.
• Engineering deliverables: The page reports Allan Block training and installer/inspector designations, rather than establishing an engineering-design or permit package.[5] Ask who would provide any engineering your project needs.
• Construction role: Its credentials are vendor-reported, not independent evidence of construction performance.[5] Ask how its installation scope would coordinate with the engineer’s design and reviews.

Ask Builtex and Back40 to confirm a property-specific package and availability for your site. Use the comparison to separate responsibilities, not to rank unlike services.[1][5]

Agree site and ground inputs before design

Before accepting a design fee, ask for a list of information supplied, gaps to resolve, who assesses adequacy and who obtains further survey or investigation.

• Boundaries and access: Identify available survey or boundary information. Ask whether further confirmation is needed for ownership, easements, encroachments, construction access or neighbour-related constraints. Treat these as project questions, not mandatory BC submissions.
• Site and ground: Ask which existing and proposed grades, wall layouts, soil information, water conditions, drainage routes, nearby loads, adjacent structures and terraced walls the team needs to assess.
• Replacement walls: Ask whether original drawings, repair records, photographs or observations of movement and water would help define the assignment.

As background—not BC requirements—US contractor Dirt Connections’ article discusses soil, geology, topography, saturation, nearby loading and terraced-wall interaction; Adams Landscape Supply discusses ground and drainage conditions.[2][6]

Have the engineer identify which inputs are adequate and which assumptions need checking. Ask how boundary and soil information will inform the wall design, rather than treating either as the finished design.

Assign structural, geotechnical and drainage roles

Builtex lists structural retaining-wall design.[1] Ask its proposal to identify where that role ends and any specialist’s role begins. Agree responsibility for ground assessment, drainage and grading, survey information, installation and coordination, according to the project’s needs.

• Who assesses whether specialist input is needed?
• Who supplies and checks design assumptions?
• Who resolves conflicts between designers’ information and site findings?

Give drainage a named design responsibility. Adams Landscape Supply identifies drainage measures intended to address hydrostatic pressure behind a wall.[6] Distinguish installing specified drainage components from designing the drainage arrangement. Ask who coordinates that arrangement with grading and the wall design.

Specify drawings and other deliverables

Ask for a deliverables list, not simply “engineering drawings.” Builtex’s separate listings for retaining-wall design, permit structural drawings, Schedule B, condition reporting and construction reviews do not establish a bundled retaining-wall package.[1]

Have the proposal mark each applicable item included, excluded or by others, naming the responsible party:

• Drawing package: Its purpose, design assumptions, specifications and supporting calculations.
• Coordinated documents: Drainage or grading documentation and how ground-condition and survey information will be incorporated.
• Delivery: Documents to be signed or sealed where applicable, file formats and how revisions will be issued.
• Schedule B: Whether it applies to this project, who supplies it and when.

Separate permit drawings from administration

Builtex’s services page lists permit-application structural drawings and Schedule B Letters of Assurance, but does not state that it submits applications, pays fees, responds to municipal comments or guarantees approval.[1]

Ask the proposal to name who will:

• Check submission requirements with the relevant local authority.
• Assemble and submit the application.
• Pay application fees, identifying whose funds cover them.
• Track municipal comments and coordinate responses and revisions.

Confirm whether responses and revisions are included, subject to a limit or separately priced. Agree how additional work will be authorized. Check project-specific requirements with the relevant authority rather than assuming the drawing package covers permit administration.

Define construction reviews before accepting the fee

Builtex lists construction-stage field reviews and inspections of structural components.[1] Ask for the anticipated stages, timing and scope for your wall.

• Attendance: Who requests visits, with what notice and access arrangements?
• Reporting: What observations will be recorded, who receives findings and who handles follow-up?
• Unexpected conditions: What happens if ground conditions differ from assumptions or work is covered before a planned review?
• Fees: How will extra visits and follow-up reviews be priced and authorized?

Clarify the limits of the review role, including whether any continuous supervision is proposed. Ask how the team will address ground-related uncertainty rather than treating engineering engagement as eliminating it.

Agree changes and completion records

Request a written change process: document the proposed deviation, obtain the responsible designer’s review and agree fees or drawing revisions before affected work proceeds. Include questions about changes to wall height or alignment, material substitutions and unexpected ground or water conditions.

Ask Builtex to define a change-approval procedure and a retaining-wall completion package. Ask who tracks deficiencies, confirms their resolution and supplies each applicable handover item:

• Construction-review records and final correspondence.
• Record drawings, photographs and material information.
• Maintenance instructions and warranties.

What to confirm with each provider

Compare fees after aligning scope and identifying exclusions and work assigned to others. Ask Builtex to confirm engineering fees, and ask Back40 to confirm installation prices; from both, get deposits, payment schedules, project duration, quote validity and cancellation terms in writing.

• Confirm availability and suitability for the property.
• Request the fee, payment stages, additional-service rates, schedule and quote validity.
• Agree cancellation terms, liability terms and any warranties.

Before signing, check that the written proposal assigns the design inputs, engineering deliverables, permit administration, construction reviews, change approvals and completion records. Request a revised scope for unresolved responsibilities.

References

1. Structural Engineering Services and Structural Engineering Design, Burnaby, – Builtex Engineering Group Ltd. (builtex.ca)
2. Engineered Retaining Wall (dirtconnections.com)
5. Certified Allan Block Wall builders (back40landscaping.ca)
6. Retaining Walls 101: What Contractors Should Discuss … (adamslandscapesupply.ca)