Process

Why Icon Signs a Pre-Construction Services Agreement Before Any Hammer Swings

May 11, 2026Sanj Aggarwal8 min read

A pre-construction services agreement isn't paperwork — it's the discipline that turns a custom-home idea into a buildable, contractable project before the meter starts running.

When a Burnaby homeowner asks us to start their custom home, the first thing we sign is not a build contract. It's a Pre-Construction Services Agreement — a PCSA. The clients who have built before recognize it immediately. The clients who haven't usually ask why.

The short answer is that a custom home cannot be priced, scheduled, or contracted reliably from a set of schematic drawings. Anyone who tells you otherwise is either guessing or selling you a number that will move later. The PCSA is the structured engagement during which the project becomes real enough to commit to.

What a PCSA is

A PCSA is a paid professional engagement between a homeowner and a builder for the period between schematic design and a signed construction contract. It defines the work the builder will do during pre-construction, the deliverables at the end, and what happens if the project doesn't proceed.

In our practice, the PCSA covers the period from roughly 50% schematic design to the moment construction drawings are issued for permit and tender. It runs in parallel with the architect's design development. Our team is on the project — reviewing constructability, modelling schedule, scoping allowances, building the risk register — long before the City sees a drawing.

The agreement is paid because the work is real. We are committing senior team members to a project for several months. The fee is structured against deliverables, not hours, so the homeowner knows what they're getting.

Why we use one

Three reasons, in order of importance.

One: it eliminates the bait-and-switch. A builder who agrees to a number on schematic drawings and expects to "make it work" is incentivized to take shortcuts later. A PCSA forces the hard conversations — about allowances, scope, and trade-offs — at the front, when changing the design is still cheap.

Two: it produces a real schedule. A schedule built in pre-construction, with the actual trades booked against the actual sequence, is an order of magnitude better than the schedule on a typical builder's proposal. We've watched too many projects start with a 12-month schedule that only existed because someone wrote "12 months" in a spreadsheet.

Three: it protects the relationship. The construction year is long. Things will go wrong. The trust between the homeowner and the builder during construction is built — or not built — during pre-construction. A team that's worked together for four months before breaking ground knows how to communicate when something unexpected appears.

The cheapest hour on a custom home is the hour spent before construction starts. A decision made at the kitchen table with the architect and the builder costs nothing. The same decision made when the framing crew is on site costs ten times more.

— Sanj Aggarwal, CHBA BC Master Residential Builder

What's in scope during pre-construction

A typical PCSA in our practice covers six categories of work:

Constructability review. Every drawing the architect produces is read by our senior project manager and our lead carpenter for buildability. Conflicts between architectural and structural, dimensions that don't add up, details that won't survive the BC south coast climate — all caught before the drawings are stamped.
Schedule modelling. We build a working schedule with real trade durations, real material lead times, and real weather buffers. We update it weekly during pre-construction.
Allowance scoping. Every allowance line in the eventual contract is researched, scoped, and matched to a real product or supplier — not pulled from a spreadsheet of averages.
Risk register. The list of things that could go wrong on this specific lot — geotech surprises, neighbour conflicts, permitting variances, supply-chain risks. Each risk is owned, monitored, and either mitigated or budgeted for.
Permit coordination. We don't submit the building permit; the architect does. But we make sure the submission is ready, reviewer-friendly, and complete on day one. The City of Burnaby's permit process — and the equivalent in Vancouver, Coquitlam, and Surrey — rewards a clean first submission.
Trade engagement. Key subcontractors — concrete, framing, mechanical, electrical, drywall — are brought into the design coordination meetings. They review their portions of the drawings and commit to scope before the contract is signed.

The constructability review

This is where most of the dollar-impact of pre-construction shows up. A constructability review by a senior builder reading drawings with construction in mind catches:

Beam-and-post conflicts that would have required a re-frame
Plumbing chases that don't have room for the actual plumbing
Skylights drawn over rafter locations
Stairs that meet code on the drawing but won't survive the installer
Window heads that conflict with the structural strategy

A reviewer who has built 50 homes spots these in an afternoon. Resolving them at this stage is a redline on a drawing. Resolving them in the field is a change order, a delay, and sometimes a structural rework.

Allowance scoping vs fixed scope

A construction contract has two kinds of line items: fixed scope (the builder commits to a number for a defined deliverable) and allowances (the contract assumes a placeholder for items the homeowner will select later — finishes, fixtures, appliances). Allowances are not a problem; under-scoped allowances are.

During pre-construction, we walk through every allowance line with the homeowner and identify a specific product (or product range) that's appropriate for the home. The allowance becomes anchored in reality. If the homeowner later chooses something more expensive, the variance is transparent and small. If we left allowances at a guessed number, the variance compounds across thirty line items and the final cost looks nothing like the contract.

The risk register

Every project has risks specific to its lot, neighbourhood, and design. A Burnaby Heights teardown next to a 1942 neighbour with shared retaining walls has different risks than a Brentwood new build in a rezoned area. A West Vancouver project on a steep slope has different risks than a flat North Vancouver one.

We document the top 8 to 12 risks at the start of pre-construction and update the register weekly. By the time we're signing the construction contract, every risk is either mitigated, accepted with a contingency, or paid down with a specific consultant report. This is what professional construction managers have always done. We do it on every custom home, regardless of size.

Schedule modelling

A real schedule is built bottom-up: each trade's duration, each inspection's lead time, each long-lead-item delivery. The schedule shows the dependencies — you cannot pour the slab until the underground plumbing has been inspected, you cannot insulate until the rough-in inspections are signed off, you cannot drywall until the energy advisor has done the mid-construction blower-door test.

We share the working schedule with the homeowner at pre-construction milestones. They get to see how the math actually works. By the time we're breaking ground, the homeowner and the builder have the same calendar in their heads.

The PCSA fee — what it covers and what happens if the project doesn't proceed

The pre-construction fee varies by project scale and complexity, but typically represents 1–2% of the anticipated construction cost. It is a professional fee for defined services — not a deposit against construction, and not refundable if the project goes forward with a different builder.

The contract should specify precisely what the fee covers: the number and nature of the constructability reviews, the schedule milestones, the format of the final deliverables, the meeting cadence. It should also specify what happens at termination — in both directions. If the homeowner chooses not to proceed with the project, or proceeds with a different builder, the builder keeps the fee and the homeowner keeps the deliverables (drawings feedback, risk register, preliminary schedule). If the builder withdraws, the homeowner should hold the deliverables and any trade engagement summaries.

The PCSA is not a guarantee the project will get built. Life changes. Site conditions change. Permit decisions change. The agreement's job is to make sure that if the project does proceed, it proceeds from a position of genuine knowledge — not from the fiction of a schematic estimate.

Why we won't quote a fixed construction price before pre-construction

We get asked regularly to provide a fixed-price construction commitment from schematic drawings. We decline, and here's the exact reason: a schematic drawing set for a Burnaby custom home specifies the building's shape and approximate room arrangement. It does not specify the foundation depth and type. It does not specify the structural steel strategy. It does not specify window sizes and performance specifications. It does not specify the mechanical system. It does not specify finishes.

A fixed price built on that level of information is either a very large number with a very large contingency, or a number that will move materially once the real scope is known. Neither serves the homeowner.

What we can provide from schematics is an order-of-magnitude range: a broad bracket based on comparable completed projects, designed to tell a homeowner whether the project is in the right financial territory before they invest in detailed design. Once the PCSA runs and the drawings develop, the number tightens. By the time the construction contract is ready to sign, the line items are real.

Handover into construction

Pre-construction ends with a handover meeting and a signed fixed-price construction contract. The deliverables: complete construction drawings, a complete trade roster with letters of intent, a complete schedule, a fully scoped budget, and a signed risk register. The construction phase begins from a known starting point. There are no surprises in the first month — because the first month was already worked through on paper.

This is the discipline. It's not glamorous, and it's not what makes the cover photo. But it's the difference between a custom home that comes in on time and on budget, and one that doesn't.

How this fits with the bigger picture

A PCSA assumes you've already chosen a builder. If you're earlier than that, our 12 questions to ask before signing a builder contract is the right starting point. If you're choosing between custom-home design paths, architect vs builder drawings and the planning checklist cover the next layer.

If you're at the moment where it's time to commit to a team and a process, reach out. Pre-construction is where the project starts. The hammer comes much later.

Related on the Journal

Part of the Builder Selection Guide: Choosing a Custom Home Builder — full guide