Unfinished space into living space. Rec rooms, home offices, in-law suites, legal secondary suites. In-house Red Seal electricians and plumbers, in-house framing, and direct coordination with the Chilliwack Building Department when the project calls for it.
Quick Answer
Basement renovations in Chilliwack run $35K to $60K for a basic rec-room finish, $60K to $100K for a finished basement with bathroom and bedroom, and $100K to $150K for a legal secondary suite. Legal suites typically pay back in 5 to 8 years through rent. Egress windows, fire separation, and sub-panel installs all handled in-house. Permit coordination with the Chilliwack Building Department included.
Why basements are different
The structural and finish work in a basement is similar to any other renovation. What is different is the code side: fire separation, egress windows, below-grade drainage, ejector pumps, flood construction levels, fire-rated assemblies, and interconnected smoke detection. The Chilliwack Building Department pays close attention to basement work, and for good reason.
Legal secondary suites are the most code-heavy work we do in residential. The rules changed recently with Bill 44 and the Small-Scale Multi-Unit Housing amendments, and Chilliwack now permits up to four units on qualifying single-detached lots inside the Urban Growth Boundary. That has opened up basement suites as a mortgage-helper strategy for more homeowners than ever before.
We coordinate the permit side directly with the Building Department, which is easier when the company pulling the electrical trade permit and the plumbing trade permit is also the company building the suite. One submission, one inspector trip per stage, one set of eyes accountable for the finish matching the rough-in.
The finish still needs to feel like somewhere you want to live. That is where the Huntley project manager earns the fee: making sure the fire-separation ceiling, the ejector pump access, the sub-panel location, and the vent routing all disappear into finishes that read as a modern home, not a permitting document.
The Chilliwack basement context
Chilliwack basements vary a lot by neighborhood. A walk-out on Promontory is a completely different project from a low-ceiling basement in a 1970s Sardis rancher or a floodplain property on Fairfield Island. We plan the basement for the lot and the house in front of us.
Where it applies
Flood construction level applies here. Chilliwack’s Floodplain Regulation Bylaw prevents new secondary suites from being built below flood construction level. On many Fairfield Island lots, that effectively blocks a legal basement suite and means we plan a coach house or main-floor suite addition instead. We check the FCL against your lot before scope discussions get too specific.
Where it applies
Ranchers and split-level homes from the 1960s through 1980s with unfinished basements are the most common basement renovation in this part of Chilliwack. Ceiling height is usually the first thing we check (7 feet minimum under BC Building Code for habitable rooms), along with the capacity of the existing electrical service.
Where it applies
Walk-out basements and daylight basements are common on hillside and newer subdivisions. These are some of the easiest legal suites to build because egress, entrance, and natural light are already in the design. Secondary suite permits move faster when the structural conditions are straightforward.
Where it applies
Septic system capacity becomes a factor on rural properties. An added bathroom or a secondary suite increases load on the septic field and sometimes requires a capacity upgrade. We coordinate with the septic designer where needed so the basement project does not outrun the sewer side.
Recent work
Suites, rec rooms, in-law spaces, built-in bars. A few recent basement projects with more photography from our current shoot coming soon.
What we build downstairs
From a single open rec room to a complete legal suite with its own entrance. Every scope gets handled by the same team under the same project manager.
Permit-approved suites with separate entrance, code-compliant egress windows, fire-rated separation between floors, independent heating, ventilation, and usually a separate electrical sub-panel. Mortgage helper or rental income on the Chilliwack rental market.
Self-contained living space for family members. Scope is similar to a legal suite but often without the separate metering, dedicated entrance, or full-kitchen requirement, depending on how the space gets used.
Open entertainment space, bar areas, proper sound-rated rooms for home theatres, game rooms. Often combined with a bathroom addition and a guest bedroom. Much more straightforward than a legal suite on permits.
Dedicated workspace with proper lighting, data cabling, and HVAC. Home gyms with reinforced flooring, mirror walls, and dedicated electrical circuits sized for treadmills or power racks.
Adding basement bedrooms legally requires code-compliant egress windows, proper ventilation, and smoke detection. Often done alongside a bathroom addition to create a self-contained guest wing.
Adding a bathroom in the basement typically means a sewage ejector pump for below-grade drainage, careful venting planning, and proper waterproofing. Our Red Seal plumbers handle the design from rough-in through final fixture.
Cutting new or enlarging existing basement windows to meet BC Building Code egress requirements. Includes window well excavation, proper drainage at the well base, and weather sealing. Required for legal suites and legal bedrooms.
Interior perimeter drainage, sump pumps, vapor barriers, framing off the foundation wall rather than directly against it. Existing moisture problems are diagnosed and solved before anything gets covered with drywall.
How a Huntley basement gets built
We look at ceiling height, moisture signs, existing plumbing drops, electrical capacity, window sizes, and entrance access. We tell you honestly whether the space supports what you have in mind (legal suite, rec room, extra bedroom) or whether the constraints point somewhere else.
Floor plan laid out to zoning, fire separation, and code-required egress. Legal suites get their Building Department review checklist mapped in. Line-item quote with every trade priced: framing, electrical, plumbing, tile, flooring, finish. No vague allowances.
Permits pulled for everything the scope requires (and legal suites always require them). If the space has any moisture or drainage issues, we solve them before framing starts. Perimeter drainage, sump pump, or interior vapor management done in order.
Framing, electrical rough-in (including sub-panel where required), plumbing rough-in (including ejector pump for below-grade bathroom), HVAC extensions, fire separation framing and drywall, egress window install. Inspections booked and passed before close-up.
Drywall, taping, paint, flooring (vinyl plank, engineered wood, tile), trim, fixtures, kitchen install for suites, final electrical and plumbing, appliances if applicable. Walkthrough with you and any final inspection. 12-month Huntley Workmanship Commitment from handover.
Honest numbers
Most contractors will not publish real numbers. We will. These are typical Chilliwack project ranges by scope tier. Legal suites carry a premium because of the code, permit, and fire-separation work. Your quote is line-itemed after a site visit.
Basic finish
$35K – $60K
Open rec room, minimal bathroom additions (or none), standard flooring, paint, baseboards, lighting. No legal-suite requirements. The entry point for turning unfinished space into comfortable living space.
Finished basement
$60K – $100K
Framing, drywall, flooring, bathroom addition with ejector pump, bedroom with egress, rec room, laundry relocation possible. Proper moisture management. No separate suite, but a real second level.
Legal secondary suite
$100K – $150K
Full legal suite build: separate entrance, egress windows, fire separation, separate electrical sub-panel, independent heating, full kitchen, bathroom, bedroom(s), laundry. Permit coordination and inspections through to occupancy.
Premium / complex
$150K+
Premium finishes, larger suites (two bedrooms plus living space), wet bars, home theatre rooms, complex egress excavation, significant structural changes, or combining a legal suite build with major moisture remediation.
Typical Chilliwack and Fraser Valley ranges, not quotes. Actual pricing depends on scope, existing conditions, finish selections, and whether a legal suite is part of the project. We give you a real line-item number after the site visit.
Basement renos
Legal suites, finished basements, rec rooms. The questions every Chilliwack homeowner asks before framing goes up.
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Basement work is half construction, half code. The difference between a contractor who knows the code and one who guesses is the difference between a 12-week and a 22-week build.
Typical Chilliwack contractor
Huntley Construction
Permits
Typical
Sub-trades each pull their own, separate timelines
Huntley
BC-licensed Huntley pulls electrical and plumbing permits directly
Egress windows
Typical
Cut and seal, drainage often missed
Huntley
Proper window-well excavation, drainage to perimeter, waterproofing to spec
Fire separation (legal suites)
Typical
Minimum drywall, often undocumented
Huntley
Code-rated 45 or 60-minute assemblies, documented for inspection
Sub-panel install
Typical
Subcontracted, scheduling delays
Huntley
In-house Red Seal electricians, same-day coordination with framers
Below-grade plumbing
Typical
Ejector pump as afterthought
Huntley
Ejector pump and vent routing planned at design stage
Moisture management
Typical
Frame over the problem
Huntley
Diagnose before framing, perimeter drainage or sump if needed
Related work
Keep researching
Real 2026 cost ranges for rec rooms, finished basements, and legal suites.
Read postPlain-English guide to legal suite zoning, egress, and permits.
Read postUp to four units on most single-family lots. What the rules allow.
Read postHow FCL rules affect basement renovations and suite conversions.
Read postPermits, suites, & code
Egress, fire separation, ceiling height, ejector pumps, sub-panels. We tell you upfront what your basement will support before you fall in love with a layout that the Chilliwack Building Department would never approve.