Residential Construction Services in the Cowichan Valley
We offer full residential construction services across the Cowichan Valley and outer islands. Whether a project starts with an idea, a set of drawings, or a property that needs a clear plan, our role is to bring structure to the process and carry the work through properly. That includes custom home building, renovations, general contracting, design build, house plans, and custom furniture.
Founded
2015
Cowichan Valley, BC
Experience
20+ Years
Residential construction
Certification
Red Seal
Canada's highest trade standard

our services
Custom Homes, Renovations and Design Build
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Custom home building in Duncan, Mill Bay and surrounding communities
We build custom homes for clients who care about planning, strong craftsmanship, and a finished result that feels specific to the property and the way they live.
Home renovations and additions throughout the Cowichan Valley
We take on kitchens, bathrooms, additions, decks, exterior timber structures, and larger remodels that improve how a home works day to day.
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Design build, general contracting, house plans and custom furniture
We can guide the whole process, from early ideas and drawings through to the build, or step in where a project needs support.
Full Scope of Services
Everything We Build, From Foundations to Furniture
Custom home building, renovations and design-build services across the Cowichan Valley and select remote sites across Vancouver Island.
01
Design Build
One team manages design and construction from start to finish. No gap between what's drawn and what gets built. Budget predictability through integrated planning and a single point of contact.
02
Custom Home Building
AS Design Build is a residential construction company dedicated to delivering high-quality homes and renovations. We combine practical building expertise with thoughtful design to create spaces that are functional, durable, and built to stand the test of time.
03
Renovations
Kitchen and bathroom renovations, home additions, and full-scope remodels throughout Duncan and the Cowichan Valley. Active project management and trusted local sub-trades on every job.
04
Remote Access Construction
Rural and off-grid property builds across Vancouver Island. Experienced with helicopter material delivery, challenging site access, and the logistics planning that remote builds require.
05
General Contracting
Full project management with a trusted network of local sub-trades built over 20 years. Single point of accountability from groundbreaking to handover. WorkSafe BC insured on every site.
06
Commercial Renovations
Office, retail, and light commercial renovation work across Duncan and the Cowichan Valley. Full project management, permit coordination, and an established sub-trade network across all commercial trades in BC.
07
Pre-Construction Planning
Phase planning, financial draw alignment, and permit coordination before breaking ground. Set your Cowichan Valley build up for a predictable outcome and avoid costly decisions made under pressure.
08
House Plans
Hand-drafted construction drawings — floor plans, elevations, sections, and construction details — designed for your specific site. Permit-ready packages for properties across the Cowichan Valley and Vancouver Island.
09
Custom Furniture
Handcrafted tables, built-ins, shelving, loft ladders, and timber pieces made from local BC species — Big Leaf Maple, Cedar, Douglas Fir. Standalone commissions or integrated into a full home build.
Our process
How We Manage Your Project From Start to Finish
We start by understanding the client's needs, the site, priorities, and the scope of the work. That early planning helps bring clarity to the project before construction begins.
Discovery and pre-construction planning
We start by understanding the client's needs, the site, priorities, and the scope of work. That early planning helps bring clarity to the project before construction begins.
Construction and active project management
Clients have one main point of contact, coordinated trades, and a process that stays clear and well managed as the work moves forward. Every phase is carried out with oversight, precision, and accountability.
Completion, walkthrough and handover
We finish with a proper walkthrough, address anything outstanding, and hand the project over in a way that feels complete.
Service Area
Serving Duncan and the Cowichan Valley
01
Custom home building in Duncan, Mill Bay and surrounding communities
We build throughout the Cowichan Valley and beyond, depending on the project and the site.
02
Home renovations and additions in the Cowichan Valley
We work on everything from single-room updates to larger renovations and additions.
03
Design build, general contracting, house plans and custom furniture
Our services are meant to work together, so clients can get the level of support that makes sense for their project.
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Why Choose AS Design Build
Full Custom Home Cowichan Valley
“Adrian and his crew built our dream home from the ground up. Over three years, they never once made us feel like a number. Every detail was handled with the same care we would have given it ourselves. We are so proud of what we built together."
Testimonials
What Our Clients Say About Working With AS Design Build
Common Questions
Frequently Asked Questions
What services do you offer?
We offer custom home building, renovations and additions, general contracting, design build, pre-construction planning, custom house plans, custom furniture, remote access construction, and commercial renovations.
What areas do you serve?
We work throughout the Cowichan Valley and also take on rural and remote projects in other parts of Vancouver Island.
How do I get started?
Reach out through the contact form or give us a call. We can talk through what you’re planning, where the property is, and what kind of support you need.
Do you handle permits?
Yes. Permit coordination typically be part of the work, depending on the service and the project.
Do you offer design-build services?
Yes. Design build is one of our core services, and it allows clients to work with one team through both the design and construction stages.

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