Our lot was basically unusable without major engineering. Trueform's tiered wall design gave us an outdoor kitchen and dining patio with the best Fraser Valley view we could ask for.
Alex & Priya M.
Burke Mountain, Coquitlam

Burke Mountain and Westwood Plateau are some of the steepest residential terrain in the Lower Mainland. Trueform engineers walls that actually hold.
Coquitlam is one of the most topographically dramatic cities in the Lower Mainland. Westwood Plateau and Burke Mountain are two of the steepest residential developments in BC, with lot grades that drop 3 to 6 metres from street to back fence. The soil is a mix of glacial till and rocky substrate, and many lots are inside environmentally sensitive area overlays that protect the creeks draining off Burke and Eagle Mountain. Older Coquitlam neighborhoods such as Maillardville, Austin Heights, and Como Lake are flatter and more forgiving but come with their own challenges: smaller lots, mature trees with significant root systems, and aging drainage infrastructure. A one size fits all approach does not work here.
Burke Mountain is where most of our large budget Coquitlam projects happen today. The neighborhood is still growing, with new single family builds on hillside lots, and the combination of steep terrain and quality conscious homeowners means the design standards are high. We build tiered retaining wall systems with engineered base preparation, integrated drainage, and geogrid reinforcement on virtually every Burke Mountain project. The payoff is views of the Fraser Valley and Mount Baker that few other Lower Mainland neighborhoods can match.
Westwood Plateau has been established longer and many of our projects there are second generation, replacing or rebuilding hardscape installed in the 1990s that was not engineered for the slopes. We see a lot of failing walls from the early days of the neighborhood: undersized base preparation, missing drainage, insufficient geogrid. Rebuilding these correctly takes more effort than starting fresh because we have to remove the old wall, often dispose of contaminated base material, and reengineer the new wall to modern standards.
Maillardville and Austin Heights are flatter, older Coquitlam. Lot sizes are smaller, and the soil is better (silty loam over glacial till). But mature trees are everywhere and tree protection is enforced by the City of Coquitlam, so excavation near root zones requires planning and sometimes air spade work. Como Lake and River Springs often have drainage considerations because of the lake and creek systems. Every Coquitlam project starts with a conversation about what is actually under your lot before we talk about what will go on top of it.
Coquitlam receives 1,800 to 2,000 mm of annual rainfall, with upland neighborhoods (Burke Mountain, Westwood Plateau) seeing more than the Coquitlam River valley. Winter freeze thaw is more pronounced on Burke Mountain than in Maillardville. Mountain runoff events during atmospheric rivers are significant on upland lots.
Burke Mountain and Westwood Plateau are glacial till with rocky substrate and occasional bedrock exposures. Maillardville, Austin Heights, and Como Lake are silty loam over glacial till, which is better for excavation but with many mature trees that restrict dig zones. River Springs and Scott Creek have creek adjacent considerations.
The City of Coquitlam requires a building permit for retaining walls over 1.2 metres. Burke Mountain and Westwood Plateau have hillside development permit areas with additional slope, tree, and drainage requirements. Coquitlam has a tree protection bylaw that covers any tree with a DBH over 20 cm on residential lots. Streamside protection zones apply to many lots near Scott Creek, Como Creek, and the Coquitlam River.
On Burke Mountain and Westwood Plateau, assume engineering is part of the project, because it almost always is. In older neighborhoods like Maillardville and Austin Heights, plan around the trees, not through them. If you are near any creek in Coquitlam, verify setback requirements before designing.
A Burke Mountain new build with a 4.2 metre grade drop across the backyard. We engineered a two tier Unilock retaining wall with geogrid reinforcement, installed integrated French drains and perforated pipe behind each wall, built a 58 square metre Unilock Umbriano paver patio on the upper terrace, and finished with a natural stone tread staircase and low voltage LED path lighting connecting the terraces. The result is three distinct outdoor zones on what was previously an unusable slope.
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Burke Mountain walls almost always require engineered drawings because of the slope angle and surcharge loads. We use segmental retaining wall systems (Allan Block, Unilock, Belgard) with geogrid reinforcement calculated for the specific slope and soil conditions, compacted granular backfill behind the wall, perforated drain pipe with filter fabric, and a deeper base than industry minimum. For walls over 1.8 metres we coordinate with a structural or geotechnical engineer.
Most failing Westwood Plateau walls were built in the 1990s before modern geogrid and drainage standards were widely adopted. Common failure modes are inadequate base depth, missing drainage behind the wall, insufficient geogrid reinforcement, and poor backfill compaction. We rebuild these walls to current ICPI and manufacturer specifications, which includes removing the old base material and starting over rather than patching.
Yes. Coquitlam's tree protection bylaw covers any tree with a DBH over 20 cm on residential lots. Any excavation within the tree's critical root zone requires planning. We use tree protection fencing, hand digging, or air spading inside the root zone to prevent damage. If a tree must be removed, a permit is required. We scope tree protection into every Coquitlam project that involves excavation near mature trees.
Yes, but streamside protection setbacks apply. The City of Coquitlam enforces streamside setbacks around Scott Creek, Como Creek, the Coquitlam River, and other fish bearing waters. We verify the setback line on your lot before designing and keep all hardscape outside the protection zone. For projects near the setback we often coordinate with a Qualified Environmental Professional.
Coquitlam retaining wall costs range from $40 to $100 per square face foot installed. Burke Mountain and Westwood Plateau projects are at the higher end because of engineering, rock excavation, and drainage complexity. Maillardville and Austin Heights flat lot walls are at the lower end. Typical Coquitlam wall projects range from $12,000 to $50,000 depending on scope.
Yes. Burke Mountain is one of our top neighborhoods for full outdoor kitchen builds, and the views invite it. We design covered structures, built in gas grills, countertops, refrigeration, and integrated lighting. Gas line permits are always part of the project and we coordinate with a licensed gas fitter for the connection.
Our lot was basically unusable without major engineering. Trueform's tiered wall design gave us an outdoor kitchen and dining patio with the best Fraser Valley view we could ask for.
Alex & Priya M.
Burke Mountain, Coquitlam
We had a failing wall from the original build. They tore it out, reengineered the base, and rebuilt it properly. Two winters in and it has not moved.
Greg S.
Westwood Plateau, Coquitlam
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