*Disclosure: All pricing in this article is based on 2026-2027 numbers, and is meant to be a starting point to a very complex answer. Read more to find out why.
Building on an island is not new to Blue Water Concepts founder Mike Van Capelle.
Mike grew up in Muskoka, Ontario, spending much of his childhood and teenage years building on islands with his father’s construction company. Working on the islands of Howe Sound years later feels familiar in many ways.
The basic challenge has not changed. Once the road ends, every person, tool and piece of material has to reach the site another way.
The West Coast changes the conditions.
Instead of accessing island projects by snowmobile over winter ice, access is by boat. Tides affect movement. Heavy rain becomes part of the schedule. Materials, crews and equipment all have to move through a transportation system that does not exist on a normal residential lot.
Those differences show up quickly in both budget and planning. A home that is relatively straightforward to build on an accessible Squamish property can become a very different project in Whistler or on a boat-access island. Rock, snow, site access, material handling, weather and energy-performance targets all influence how the home needs to be designed, priced and built.
For someone researching the cost to build a home in Whistler, the cost to build in Squamish in 2026, or what is involved in building on Gambier Island, a cost-per-square-foot figure is useful, but it is only a starting point.
The real cost comes from the combination of the house and the place where it has to be built.
What It Costs to Build on the West Coast in 2026
Cost per square foot is useful early in the conversation because it helps determine whether the overall scale of a project matches the available budget.
It should not be mistaken for a construction estimate.
Our existing guide to the cost of building a home in Squamish uses approximately $600 per square foot and up as a starting point for a mid-level custom home.
For the scale of custom projects we typically work on, the budget generally falls into two broad categories.
Mid-level custom home
Typical construction budget: $1.2 million to $1.99 million
Starting guideline: approximately $600 per square foot and up
That can support a genuinely custom home, but the final cost still depends heavily on the site and design. Square footage, structural complexity, glazing (Windows), kitchens, bathrooms, millwork, exterior living spaces and energy-performance targets can move the budget considerably.
High-end custom home
Typical construction budget: $2 million+
At this level, cost is often driven by more than upgraded finishes. Difficult sites, complex architecture, large glazing (window) packages, custom structural work, detailed interiors, premium materials and higher performance targets can all contribute.
This is also where square-foot pricing becomes less useful.
Two houses of the same size can have very different construction costs if one sits on an accessible flat lot and the other requires substantial rock work, difficult staging or marine access.
That is why our estimating process becomes progressively more detailed as the design develops.
An early Class D estimate is used to test feasibility and is intended to bring the expected project cost within roughly 20 percent. Preparing one typically requires several hours of estimator time, along with previous project data and a defined scope.
Later, the Class B estimate goes much deeper. It can contain hundreds of individual line items and take 40 to 50 hours to prepare. At that point, the target is approximately 10 percent of the eventual project cost.
The goal is not to produce an attractive number at the beginning of the project. It is to understand what this particular home, on this particular site, is actually likely to cost before construction begins.
Same House, Three Locations: Squamish vs. Whistler vs. the Islands
Take the same basic custom-home concept and place it in Squamish, Whistler and on Gambier Island.
The drawings might start from a similar idea. The construction plan will not.
Squamish: the baseline
Squamish gives us the most straightforward starting point.
On most projects, crews can drive directly to site, suppliers can make normal deliveries and equipment can be mobilized by road. There is no need to plan every stage of construction around marine transportation.
That does not mean every Squamish lot is easy.
Steep terrain, rock, drainage and high-performance construction can all create significant technical challenges. Site conditions can change excavation, foundation design, retaining requirements and the way materials move around the project.
The difference is that there are fewer logistical steps between the supplier and the job site.
Whistler: more complexity before construction starts
Move the same home north to Whistler, and additional constraints begin to influence both design and construction.
Snow loads become a greater structural consideration. Staging and access can be more difficult. Seasonal conditions can affect sequencing. The Resort Municipality of Whistler approval process also needs to be considered early rather than after the design is substantially complete.
Permitting itself can take considerably longer.
A relatively straightforward Squamish permit may take around three months, while Whistler can take six months or more.
That difference matters when setting expectations at the beginning of a project. A construction schedule cannot be separated from the design and permitting schedule that comes before it.
Whistler can also carry a cost premium over a comparable Squamish project, but there is rarely one single line item responsible for it. Structural requirements, access, staging, labour, scheduling and site conditions can all add cost in different ways.
Remote islands: when transportation becomes part of construction
Island construction changes the equation again.
Our remote island building Q&A estimates that remote construction can cost approximately 15 to 30 % more than a comparable mainland build, depending on the site and project.
The reason becomes obvious once construction starts moving.
Materials may travel by truck to a marine terminal, then by barge, then by smaller boat. Workers need daily transportation. Heavy equipment may require separate mobilization. Some subtrades need accommodation. Large deliveries have to arrive in the right sequence because a missing component cannot always be replaced with a quick trip back to the supplier.
We operate our own all-weather aluminum crew boat to move employees, subtrades, tools and smaller material loads to remote projects.
On our completed Gambier Island Net Zero cabin, the property was accessible only by boat. Materials had to be barged to and from the island while crews travelled to site using our company boat.
Another Gambier Island remote cabin pushed those logistics further. Materials were barged from Horseshoe Bay and then lifted by helicopter to a cliffside site. With no grid power available during construction, the project relied on solar panels and generators.
This is why square footage alone does not explain the price of an island home.
On the mainland, construction logistics support the project. On a remote island, logistics are part of the project.
For a deeper look at those challenges, see What to Expect When Building on a Remote Island.
How Long It Really Takes
The question we often hear is simple: how long will construction take?
The useful answer starts earlier than construction.
A custom home moves through design, estimating, permitting and pre-construction before excavation begins. The time spent in those stages affects what happens later.
Design and pre-construction
Our process starts by defining what the client wants to build and testing that idea against a realistic budget.
If we are providing the design in-house, the project moves into a separate design agreement. When a client already has an architect or another design team, we use a pre-construction management agreement instead.
The purpose is essentially the same.
The people who will eventually estimate, manage, and build the project are involved while the design is still being developed.
That allows construction details, site conditions, scheduling and cost to influence the drawings before decisions become expensive to change.
Pricing develops alongside the design.
A Class D estimate establishes the early budget direction. As drawings, selections and construction details become more complete, the Class B estimate provides a much more detailed view of where the money is going.
This is also where the construction team can identify details that may look straightforward on paper but become difficult or unnecessarily expensive on site.
Permitting
Permitting varies substantially by location.
In Squamish, a typical process can take around three months.
In Whistler, six months or more is a more realistic planning assumption.
Remote island projects can take be anywhere from a couple months to a year depending on where the island is located , particularly when additional studies, site conditions or approvals have to be addressed. Some island/ remote projects are dealing with multiple governing bodies for approval.
The exact path depends on the property and jurisdiction, but the larger point is consistent: permitting needs to be part of the project strategy from the beginning.
Waiting until the design is effectively finished before considering approvals can lead to redesign work and unnecessary delays.
Construction
The construction agreement comes after the project has moved far enough through design and pre-construction to understand the scope, budget and schedule in meaningful detail.
We intentionally keep design or pre-construction separate from the construction contract.
The first phase is where the project is defined, tested and costed. The second is where it gets built.
That separation gives clients several opportunities to understand where the budget is going before committing to production.
You can see the complete sequence on our client process page.
For remote projects, there is another schedule running alongside the construction schedule: logistics.
Barge bookings, material deliveries, crew transportation, weather windows and heavy lifts all have to arrive at the right point in the build.
On a mainland project, a missing component may mean a delayed delivery. On an island, it can disrupt an entire planned movement of people, equipment and materials.
Good remote construction depends heavily on planning those movements before they become site problems.
Built for the Site, Built to Last
Difficult sites have a way of exposing weak planning.
High-performance construction raises the standard again because individual components cannot be treated in isolation. The building envelope, windows, mechanical systems, penetrations and construction details all have to work together.
Our Gambier Island Net Zero cabin is a good example.
The boat-access home was designed for a local Squamish family who wanted a high-performance, comfortable and low-maintenance island retreat.
During design, the sun path across the property helped inform the orientation of the home and its glazing. The finished cabin uses integrated rooftop solar, high-performance triple-glazed windows and doors, and a highly insulated, airtight building envelope.
The home achieved CHBA Net Zero certification and Step 5 of the BC Energy Step Code and was later featured by Western Living in an article about airtight, high-performance homes.
Its final airtightness result was 1.0 ACH50.
For context, two of our previous Passive House projects achieved 0.19 ACH50 and 0.18 ACH50.
Those numbers matter because airtightness is not something that can be added at the end of construction. It comes from hundreds of design and installation decisions made throughout the project.
The Gambier cabin also illustrates an important reality of building in demanding locations: performance must be considered alongside the site.
On a remote island, material selection may be affected by transportation and long-term maintenance.
On a steep Sea to Sky lot, rock, excavation and foundation requirements may drive decisions much earlier than interior finishes.
In Whistler, snow, weather, and structural requirements must be addressed alongside the architecture.
A strong design still needs a construction strategy behind it.
Someone has to work out how the home will be priced, permitted, staged, transported and assembled on the actual property.
On difficult projects, that process is not separate from the quality of the finished home. It is part of what makes the finished home possible.
Thinking About Building Out Here?
If you are considering a custom home in Squamish, Whistler or one of BC’s remote coastal communities, it is worth involving the construction team while the project is still flexible.
You do not need every finish selected or every architectural decision resolved.
The first questions are more fundamental.
- Can the house you are imagining be built within the budget you have in mind?
- What does the property itself add to the project?
- Which design decisions have the biggest effect on cost?
- What has to happen before the permit can be submitted?
- And if your property can only be reached by water, how will crews, materials and equipment actually get there?
Those questions are easier to answer before construction begins than after the project is already committed to a design.
Blue Water Concepts collaborates with our in-house team as well as external architects to integrate design, estimating, and construction early in the process. For clients evaluating a potential renovation or searching for land for a new build, we also partner closely with realtors to help identify and select the ideal property.
Explore our client process or start a conversation about your project.