Legal secondary suites for rental income, coach houses, and additions across the Township of Langley. From Walnut Grove basements that convert cleanly to Fort Langley character homes with a heritage pathway. In-house Red Seal trades, engineering coordination, and permits handled end to end.
12 mo
Workmanship Commitment
Every trade we put on the project, covered for a full year.
Red Seal
In-house electrical & plumbing
Both trades on the Huntley payroll, not subcontracted.
Up to 4 units
Per Langley SSMUH zoning
Bill 44 on qualifying lots, subject to Township rules.
One PM
Running every trade
One schedule, one point of contact, one accountable team.
Quick Answer
Legal suites and additions in the Township of Langley run $100K to $150K for a legal basement suite conversion, $150K to $300K for a rear addition, and $300K to $500K+ for a second-storey addition or coach house. Engineering, permits, and in-house Red Seal trades handled end to end. The Township has adopted SSMUH under Bill 44, which can allow up to three or four units on qualifying urban lots, subject to Township setbacks, parking, and lot-coverage rules. Line-item quotes after a site visit.
Legal suites in Langley
Langley homeowners are legalizing suites for a simple reason. A code-compliant secondary suite turns unused basement space into steady monthly income, and most lenders count that income toward your mortgage. The Township of Langley has adopted Small-Scale Multi-Unit Housing under Bill 44, which opened up more on a single lot than the old single-suite rules allowed.
The housing stock makes Langley well suited to suites. Walnut Grove and the 1990s family homes carry full basements that convert cleanly. Willoughby and Yorkson have newer stock, with many basements already pre-plumbed for a second kitchen. What changes the project is the legal frame around the lot: Township setbacks and parking minimums, ALR status on larger Brookswood and Aldergrove parcels, and the Heritage Conservation Area around Fort Langley. We check the legal frame before we check the physical one.
Legalizing a suite is not just framing a wall and adding a stove. It means code-compliant egress, fire separation between units, a dedicated sub-panel, and a separate entrance the building department will sign off on. Each of those is an inspection. Where the work is detached, a coach house brings servicing trenches, parking, and zoning compliance on top.
Because our framers, Red Seal electricians, and Red Seal plumbers are Huntley employees, the suite work gets coordinated in person on site. The egress, the fire separation, the sub-panel, and the plumbing rough-in happen on one schedule run by one project manager, not on a string of phone calls between separate trades. One accountable company, one 12-month workmanship commitment.
The Langley suites context
The Township of Langley covers a wide spread of housing, from 1990s Walnut Grove family homes to Fort Langley character properties and large Brookswood and Aldergrove lots. Bill 44 SSMUH opened more options, but heritage overlays, ALR rules, and septic capacity shape what is possible on a specific property. We plan each one for the lot in front of us.
Late-1980s and 1990s family homes with full basements that convert cleanly to legal suites. Sound bones throughout. The one item we look for is polybutylene supply lines, which we replumb in PEX or copper when legalizing a suite so the new unit is not built on aging pipe.
Newer 2000s-onward stock, with many basements already suite-ready or pre-plumbed for a second kitchen. Townhomes in these areas carry strata bylaws and design review that affect what is permitted, so we confirm the strata and zoning frame before scope discussions get specific.
Fort Langley sits in a Heritage Conservation Area, which adds a Heritage Alteration Permit pathway for exterior work and detached coach houses on listed lots. Interior suite work pairs with careful exterior detailing so the legal suite goes in without compromising the character the area protects.
1970s through 1990s homes on larger lots, where coach houses and garden suites are feasible on bigger parcels. ALR-designated land restricts accessory dwellings, and some lots run on septic with capacity limits, so we verify both before committing to a detached-suite design.
What's in scope
A legal suite in the basement, a coach house in the backyard, or an addition up or out. We run every permit path and every trade for all of them, on one schedule under one project manager.
Converting unfinished or partially finished basement space into a legal secondary suite. Separate entrance, code-compliant egress, fire separation, sub-panel, full kitchen, full bathroom. Permit coordination and inspections through occupancy with the Township of Langley.
Detached secondary dwellings in the backyard. Can function as rental income, in-law housing, home office, or studio. We handle the permit path, the servicing trench for water, sewer, and electrical, and the build, including parking and lane-access requirements the Township sets.
Adding a self-contained suite above an existing or new garage. Requires structural reinforcement of the garage below, exterior stair access or integrated entry, full mechanical run, and a zoning review for the lot. A common path on Willoughby and Yorkson lots with lane access.
Extending the main floor out the back of the home. Family rooms, primary suites, kitchen expansions, sunrooms. Foundation work, framing, envelope, mechanical extensions, and finish. Often easier than going up because the roof stays put.
Adding a full or partial second floor on top of your existing home. Structural capacity assessment first, engineering coordination, roof removal, framing the new level, mechanical extensions, and full finish. Done without losing your lot footprint.
Any addition or legal suite requires structural engineering, trade permits, and building permits. We coordinate engineers we have worked with, pull our own electrical and plumbing trade permits directly, and take the Township of Langley building permit path end to end so you are not chasing the municipality.
A suite is a building inside a building.
The integration is where it lives or fails.
Framing a suite is the easy part. The egress, the fire separation, the sub-panel, the plumbing rough-in, and the inspections that sign each one off are where projects stall. Framers, Red Seal electricians, and Red Seal plumbers under one payroll, run by one project manager, is how a legal suite gets to occupancy without losing months at the inspection stage.
How a Huntley suite gets built
We walk the home, look at structural capacity, measure setbacks, check septic or sewer capacity, and review zoning against what you are trying to build. Some suites are a clean basement conversion. Some require engineering or a heritage or ALR review. We tell you honestly which category yours is in before design begins.
Architectural or designer drawings, structural engineering for load paths and foundations, mechanical upgrade plans, septic or sewer review where applicable. Suite layout, egress, and fire separation worked out, and all finish selections locked before permit submission.
Building permit, trade permits, and any Development Permit or Heritage Alteration Permit the lot requires, all through the Township of Langley. Materials and fixtures ordered early against the build schedule so the crew is never waiting on a back-ordered fixture once construction starts.
For a basement suite: framing, egress windows, fire separation, sub-panel, kitchen and bathroom rough-in, then finish. For a coach house or addition: servicing trench and foundation first, then framing, roof, envelope, mechanical rough-in, insulation, drywall, and finish, with the existing home protected throughout.
Final inspections, mechanical commissioning, deficiency walk-through, and handover of manuals and warranty documents. The 12-month Huntley Workmanship Commitment begins from handover and covers every trade that worked on the project.
Honest numbers
Most contractors will not publish real numbers on suites and additions because the scope varies so much. We will, because clients who understand ranges make better decisions. These are typical Township of Langley project bands by scope tier. Final quote is line-itemed after the site visit.
Basement suite conversion
$100K – $150K
Converting existing basement space into a legal secondary suite. Egress windows, fire separation, sub-panel, full kitchen and bathroom, separate entrance. No foundation work, no envelope work.
Rear addition
$150K – $300K
Extending the main floor out the back. Foundation, framing, envelope, mechanical extensions, interior finish. Scope depends on size and whether the addition adds a bathroom or kitchen.
Second-storey / coach house
$300K – $500K
Adding a full floor above an existing home, or building a detached coach house or garden suite from scratch. Engineering, structural reinforcement, full envelope, mechanical, finish.
Premium / complex
$500K+
Large second-storey additions with premium finishes, coach houses with multiple bedrooms and high-end materials, or combining additions with whole-home renovation scope.
Typical Township of Langley and Fraser Valley ranges, not quotes. Actual pricing depends on scope, engineering, servicing, and finish level. Final quote is line-itemed after the site visit. Legalizing a suite usually includes a dedicated sub-panel and new circuits, scoped through our electrical division.
Real numbers, real scope
Site visit, check the lot and the zoning, line-item quote. No pressure.
What to watch for
Bill 44 made it possible to add up to three or four units on most qualifying Township of Langley lots, which is genuine opportunity. It also made it possible for projects to fail in expensive ways at four specific points. Here are the most common ones we plan around.
Bill 44 SSMUH is provincial. The setbacks, parking minimums, and lot-coverage caps are all set at the Township of Langley level. The failure mode is a designer who draws the suite or coach house without confirming the local zoning constraints first. The permit application gets denied, drawings are reissued, the owner pays for design twice and waits another six to eight weeks. The fix is a zoning pre-check before design, which we run with the Township directly when we are involved at design stage.
Rear additions and detached coach houses both need foundations that work with the existing soil, slope, and drainage. On larger Brookswood and Murrayville lots, soil bearing and grade can require an engineered foundation that adds meaningfully beyond a standard slab or crawlspace. The shortcut is to assume a standard footing and price accordingly. The fix is a geotechnical or engineering review at design stage, which we coordinate and price into the contract rather than discovering the difference at excavation.
Detached coach houses in the Township of Langley require off-street parking for the new dwelling and a servicing path for water, sewer, and electrical from the lane or street. Lots without a clear parking solution or servicing route cannot get a coach house permit, full stop. On Aldergrove and rural parcels, septic capacity has to support the new unit as well. The fix is to confirm parking pathway, servicing route, and septic capacity in the first site visit, before any drawings start.
Where a new addition or above-garage suite meets the existing home, the building envelope has to integrate cleanly: roof tie-in, wall flashing, weather-resistant barrier, drainage plane. Most addition leaks happen at this seam, two or three years in, when wind-driven Fraser Valley rain finds the discontinuity. The fix is detailed envelope coordination at framing stage with photo documentation before exterior finishes go on. We treat the addition-to-existing seam as a specific design detail so the new space is one weatherproof structure with the home, not two buildings stuck together.
Langley legal suite FAQ
The questions Township of Langley homeowners ask us at the site visit. Straight answers on cost, timeline, SSMUH, permits, rent, and the heritage and ALR pathways before you sign with anyone.
Didn't see your question? Send us a message and we'll answer it directly.
Send a message →How we compare
A suite or addition is a renovation plus a new dwelling built into your existing home. Integration is where most projects fail. Here is how Huntley structures the work differently.
Typical Chilliwack contractor
Huntley Construction
Engineering coordination
Typical
Owner manages structural engineer separately from contractor
Huntley
We coordinate engineering and structural sign-offs directly
Permit path
Typical
Building, trade, Development Permit each handled by different parties
Huntley
All permits run through the Township of Langley by Huntley end to end
Envelope integration
Typical
New addition leaks at the seam where it meets the existing home
Huntley
In-house team coordinating envelope, flashing, and water management
Mechanical extensions
Typical
Sub-trade scheduling delays as electrical/plumbing extend up or out
Huntley
In-house Red Seal trades handle extensions on the same schedule
Coach house servicing
Typical
Owner coordinates trenching with city, water, sewer, electrical separately
Huntley
Servicing trench planned and coordinated as part of the build
Workmanship warranty
Typical
Sub-trade dependent
Huntley
12-month commitment covering every trade that worked on the project
Related work
Keep researching
Plain-English guide to legal suite zoning, egress, and permits.
Read postWhich option fits your lot, and which earns more long term.
Read postUp to four units on most single-family lots. What the rules allow.
Read postWhen you need a permit, what they cost, and how long they take.
Read postService area
Bill 44 SSMUH rules apply across British Columbia, but the Township of Langley sets its own setbacks, parking minimums, and lot-coverage limits, and Fort Langley adds a heritage pathway. A coach house in Brookswood differs from a basement suite in Walnut Grove. See the area page closest to your home for what we typically run into there.
Chilliwack neighborhoods
See also the full Chilliwack rollup.
Fraser Valley cities
See the full service area map.
Kitchen renovations by city
Dedicated kitchen pages for each Fraser Valley city we work in.
Bathroom renovations by city
Dedicated bathroom pages for each Fraser Valley city we work in.
Basement renovations by city
Dedicated basement & legal suite pages for each Fraser Valley city we work in.
Whole-home renovations by city
Dedicated whole-home renovation pages for each Fraser Valley city we work in.
Legal suites & additions by city
Legal secondary suites, coach houses, and home additions by Fraser Valley city.
Ready to plan
We come to your property, look at the structural feasibility and the zoning, and talk honestly about what is possible. Legal basement suite, coach house, above-garage suite, or addition. Site visit, clear scope, line-item quote. No pressure, no mystery pricing.