ADUs in Squamish and Sea-to-Sky
Accessory Dwelling Units (ADUs) in Squamish and Sea-to-Sky
Looking to build a coach house, carriage home, or backyard suite?
We help homeowners in Squamish, Whistler, Pemberton, and across Sea-to-Sky understand what is possible on their property before they commit to design or construction.
We review your site, flag key constraints, and help you choose the simplest path forward.
What this page covers
Coach Houses, Carriage Homes, and ADUs Explained
You may hear different terms like coach house, carriage home, laneway house, or ADU. In most cases, they refer to a secondary home built on the same lot as a primary residence.
The main differences come down to placement, size, and whether the unit is attached or detached.
In Squamish and the Sea-to-Sky corridor, detached coach houses are one of the most common forms of ADU, but what is allowed depends on your zoning, lot layout, and site conditions.
We help you understand what applies to your specific property before you move into design.
Common terms
What people usually mean
- ADU = general term for a secondary dwelling on the lot
- Coach house = usually a detached secondary home
- Carriage home = often above or connected to a garage structure
- Backyard suite = informal way many people describe a detached ADU
What’s allowed in Squamish
What’s Allowed for ADUs and Coach Houses in Squamish
Some properties can support both a suite and a detached ADU, but the details matter.
Most single-family lots can support
- One detached ADU (coach house)
- One secondary suite inside the main home
Key rules to understand early
- One ADU per lot
- Must remain on the same title
- Short-term rentals are not permitted in ADUs
- Livable space typically capped around 969 sq ft
- Height limits and setbacks depend on zoning
⚠︎: requirements vary by neighborhood and site conditions.
Why homeowners build ADUs
Why Homeowners Are Building ADUs
ADUs are one of the most practical ways to add usable space and long-term value to your property.
Rental income
Create a long-term rental unit that helps offset housing costs.
Family housing
Make room for aging parents, adult children, or guests while keeping independence.
Flexible living space
Add a secondary home that can adapt as your needs change over time.
Resale value
A well-planned ADU can strengthen the long-term value and utility of the property.
Downsizing on-property
Create an option to live smaller without giving up the lot entirely.
Better land use
In places like Squamish, Whistler, Pemberton, and the North Shore, ADUs help homeowners make better use of their land.
What determines what you can build
What Determines What You Can Build
Zoning tells you what is allowed, but your site determines what is realistic.
Even when zoning allows an ADU, placement or servicing can limit your options.
In many cases, the biggest limitation is not zoning — it is placement, access, servicing, or budget.
This is why we review your property early, before design or pricing.
Most important factors
- Setbacks and buildable area
- Location of the existing home
- Driveway access and servicing routes
- Slope and usable yard space
- Utilities (water, sewer, or septic)
- Flood or environmental restrictions
Example
What a Real Lot Assessment Looks Like
We start with a practical review of your property.
That usually includes
- Zoning and basic compliance
- Setbacks and buildable area
- Likely placement options
- Access for construction or modular install
- Servicing routes and site constraints
- Realistic build paths and budget direction
In many cases, a detached single-storey ADU between 400 and 600 sq ft can fit comfortably, but every lot is different.
This step helps avoid design work that does not suit the site.
Different ways to build
Different Ways to Build an ADU
There is no single way to build an ADU — and choosing the wrong approach early can cost time and money.
Modular
Often a strong fit for faster timelines and more predictable costs.
Panelized
A good option when you want flexibility, strong performance, and off-site efficiency.
Fully custom
Best when the lot or use case needs a more site-specific design response.
Build paths and partners
Build Paths and Partners
We work with a small group of modular, panelized, and custom partners so we can match the build to your land, access, and goals.
Hewing Haus
Flexible modular systems suited for cabins and expandable layouts.
Aux Box
Compact prefab units with refined design, durable construction, and a more tailored client experience.
Good Way Homes
Energy-efficient modular homes with flexible designs.
Need help comparing options?
We help you compare these options and choose what makes sense for your site and your project.
How it works
Simple Process
We keep the early steps focused and practical.
Step 1
Feasibility
We review your property and confirm what is realistic.
Step 2
Planning
We define layout, approach, and budget.
Step 3
Build and install
We manage permitting, construction, and handover.
ADU cost in Squamish and Sea-to-Sky
ADU Cost in Squamish and Sea-to-Sky
ADU costs vary based on size, design, and site conditions.
Smaller units
Around $300K+
Average projects
$400K to $500K
Larger or custom builds
$700K+
Practical range
What many lots land around
For many 1-bedroom detached ADUs in the 400–550 sq ft range, realistic all-in budgets often land around $350K to $500K, depending on the lot and build path.
Key cost drivers
- Site servicing and trenching
- Foundation type
- Access for trades and equipment
- Design complexity
- Level of finish
⚠︎ Check: pricing varies by site and scope.
Rental and long-term value
Rental and Long-Term Value
Many homeowners build ADUs to create rental income or long-term flexibility.
In the Sea-to-Sky corridor and across BC, long-term rental demand is strong, ADUs can help offset mortgage costs, and adding a second unit can increase property value.
A well-planned ADU should work as both a living space and a long-term asset.
Important to consider
- Short-term rentals are not permitted in Squamish ADUs
- Layout should support long-term use
- Durability and maintenance matter
Common mistakes to avoid
Common Mistakes to Avoid
Most issues happen when homeowners start design before understanding what actually fits on their lot.
Assuming a standard design will fit
A nice plan on paper does not guarantee it will work on your site.
Underestimating servicing costs
Trenching, hookups, and site conditions often move the budget more than expected.
Ignoring setbacks and placement
Lot layout can rule out options even when zoning looks supportive.
Planning around the wrong use case
The right layout depends on whether the ADU is for family, rental, or future flexibility.
Choosing a build method too early
Modular, panelized, and custom all have their place, but the lot should guide the choice.
Skipping early feasibility
A short review early can prevent most of these problems before they become expensive.
Property review
Can You Build an ADU or Coach House on Your Property?
In many cases, yes — but the details matter.
Even when zoning allows an ADU, your site layout, access, and servicing will determine what is possible.
Two similar properties can have very different outcomes.
This helps you move forward with a clear and realistic plan.
We review
- Zoning compliance
- Buildable area and placement
- Servicing strategy
- Access for construction
- Likely fit by size and type
Where we work
Serving Squamish, Sea-to-Sky, and Beyond
Each area has different zoning, permitting, and site constraints. We help you navigate those early.
Squamish
Coach houses, carriage homes, detached ADUs, and lot-specific feasibility reviews.
Whistler
Property-specific ADU and small-scale housing guidance where site constraints matter.
Pemberton
Rural and small-town properties with varied site conditions and servicing considerations.
North Vancouver
Coach house and secondary unit projects where zoning, fit, and budget all need early clarity.
West Vancouver
Selected projects where site, access, and design constraints require a practical early review.
Beyond Sea-to-Sky
We also support selected BC projects when the site, build type, and logistics are a strong fit.
Start with a clear plan
Start with a Clear Plan
Most homeowners do not need drawings yet — they need to understand what is realistic.
- Send us your address
- We will review your property
- We will flag key constraints and outline a clear next step