Legal secondary suites for rental income, plus home additions and detached coach houses, built onto the property you already own in Agassiz and the District of Kent. In-house Red Seal trades, engineering coordination, and permits handled from the site visit through the 12-month walk-back.
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.
$1,400–$2,400
Typical monthly suite rent
Depending on size and finish, with coach houses at the top.
One PM
Running every trade
One schedule, one point of contact, one accountable team.
Quick Answer
Legal suites and additions in Agassiz run $100K to $150K for a basement suite conversion, $150K to $300K for a rear addition, and $300K to $500K+ for a second-storey addition or detached coach house. Engineering, permits through the District of Kent, and in-house Red Seal trades handled end to end. ALR status and Fraser River floodplain rules shape what fits each lot, which we confirm at the site visit. Line-item quotes, no blanket allowances.
Legal suites in Agassiz
Agassiz sits inside the District of Kent, and what you can legally build varies more by parcel here than in most Fraser Valley towns. The village core runs 1960 to 2000 homes on municipal water and sewer, where basement and above-garage suites are straightforward. Step outside the core and the picture changes: much of the surrounding land is Agricultural Land Reserve, and many low-elevation lots sit in the Fraser River floodplain. The feasibility question comes first.
Recent provincial rules and the District of Kent’s secondary-suite and accessory-dwelling bylaws have broadened where small-scale units are possible. What actually applies to your property depends on its zoning, its ALR status, and its floodplain mapping. We check the legal frame before the physical one, because a suite drawn for a lot that cannot support it is design paid for twice.
On low-elevation lots, Flood Construction Level rules usually block a below-grade suite and push the path above-grade: a coach house, an above-garage suite, or a main-floor addition. On older farmhouses and post-war cottages, legalizing a suite is often as much a mechanical and egress upgrade as a finish job, because the knob-and-tube wiring and galvanized lines have to come up to code first.
This is where one accountable team matters. At Huntley, our framers, Red Seal electricians, and Red Seal plumbers work for the same company. The egress, the sub-panel, the second kitchen, and the fire separation get coordinated in person on site rather than across a three-way phone call between separate trades. One project manager runs the whole path on one schedule.
The Agassiz suite context
Agassiz is not one housing market. A basement suite in the village core is a different project from a coach house on ALR acreage or an above-grade suite on a floodplain lot. We plan each one for the property in front of us, and we confirm what the District of Kent and the ALR allow before scope locks.
Compact streets with 1960 to 2000 homes on municipal water and sewer. Basement suites and above-garage suites are straightforward here, with the usual service-upgrade conversation on older homes. Municipal services simplify a second kitchen and bath, which keeps suite scope cleaner than out on acreage.
Pre-1970 farmhouses and post-war cottages on acreage often carry knob-and-tube wiring, galvanized lines, and gravity furnaces. Legalizing a suite in one of these is a mechanical and egress upgrade as much as a finish job. We scope the wiring, the repipe, and the egress at the site visit so they land in the quote, not in a change order.
Much of Agassiz outside the core sits in the Agricultural Land Reserve. The ALR tightly constrains accessory dwellings and non-farm residential use, so adding a suite or a coach house needs ALR review and possibly ALC approval at design stage. We confirm the parcel status before scope discussions get specific.
Low-elevation properties sit in floodplain zones. Flood Construction Level rules apply to below-grade living space, so the suite path on these lots is usually above-grade: a coach house, an above-garage suite, or a main-floor addition rather than a basement suite. We pull the District of Kent floodplain map before quoting.
What's in scope
Down in the basement, above the garage, out the back, up a storey, or detached in the yard. We run every permit path and every trade for all of them, with one company accountable.
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. In the Agassiz village core on municipal water and sewer, the second kitchen and bath are straightforward. We coordinate the permit path and inspections through occupancy.
A self-contained suite above an existing or new garage. Requires structural reinforcement of the garage below, exterior stair access or integrated entry, and a full mechanical run for the new kitchen and bath. On rural and ALR-affected lots this path usually triggers a zoning or ALR review at design stage.
Detached secondary dwellings in the backyard, useful as rental income, in-law housing, or a home office. On low-elevation lots the coach house path is often the simplest way to add a unit above the Flood Construction Level. We confirm parking, the servicing route, and floodplain status before any drawings begin.
Extending the main floor out the back of the home for a family room, a primary suite, or a kitchen expansion. Foundation work, framing, envelope, mechanical extensions, and finish. Often simpler than going up because the existing roof stays put.
Adding a full or partial second floor on the existing home without losing lot footprint. Structural capacity assessment first, engineering coordination, roof removal, framing the new level, mechanical extensions, and full finish. The existing home gets tarped and protected while the roof is off.
Any addition or legal suite needs structural engineering, trade permits, and a building permit. We coordinate engineers we have worked with, pull our own electrical and plumbing trade permits directly, and run the District of Kent building permit path end to end so you are not chasing the municipal office.
A rental suite is income.
A suite drawn for the wrong lot is a write-off.
In Agassiz, the difference is usually settled before a single wall goes up: ALR status, floodplain level, servicing capacity, and what the District of Kent will actually permit. We confirm the legal frame first, then build the suite that fits it.
How a Huntley suite gets built
We walk the Agassiz property, look at structural capacity, check the electrical service, plumbing, and heating, and review zoning, ALR status, and floodplain mapping against what you are trying to build. Some suites are simple. Some need engineering or ALC review. We give you an honest read on which category yours is in before detailed design begins.
Designer or architectural drawings, structural engineering for load paths and foundations, mechanical upgrade plans, and septic or well review on rural lots. Finish selections and fixture specifications locked before permit submission so the build never waits on a back-ordered decision.
Building permit through the District of Kent, trade permits for electrical and plumbing pulled directly by our in-house Red Seal trades, and any ALR or floodplain approvals the scope requires. Long-lead materials and fixtures ordered early against the build schedule.
Foundation, framing, roof, envelope, mechanical rough-in, insulation, drywall, finish. For second-storey additions, we tarp and protect the existing home while the roof is off. For coach houses and garden suites, servicing trenches and foundation go in first. One project manager runs every trade on one schedule.
Final inspections, mechanical commissioning, deficiency walk-through, and handover of manuals and warranty documents for every fixture and system. 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 Agassiz and Fraser Valley 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 a suite with whole-home renovation scope.
Typical Agassiz and Fraser Valley ranges, not quotes. Actual pricing depends on scope, engineering, ALR and floodplain requirements, servicing, and finish level. Suite and addition quotes require detailed scoping beyond a first site visit. Suite conversions on older homes often include a partial or full rewire, scoped through our electrical division.
Feasibility first, then numbers
Site visit, zoning and floodplain check, line-item quote. No pressure.
What to watch for
Suite and addition projects rarely fail from one big mistake. They fail at a few specific points, usually feasibility and integration, that compound into expensive delays. Here are the four most common ones we see on Agassiz properties, and how we plan around them.
Recent provincial rules opened more small-scale housing across BC, but the parcel-level constraints in Agassiz are set by the District of Kent and the Agricultural Land Reserve. The failure mode is a designer who draws a suite or coach house without confirming ALR status, setbacks, and lot-coverage limits first. The application gets denied, the drawings reissue, and the owner pays for design twice while waiting weeks. The fix is a zoning and ALR pre-check before design. We do this with the District of Kent, and with the ALC where the parcel is in the reserve, before drawings start.
Rear additions and detached coach houses both need foundations that work with the existing soil, slope, and drainage. On low-elevation Agassiz lots, high water tables and floodplain grading 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. We coordinate the review and price the engineered scenario into the contract rather than discovering the difference at excavation.
A detached coach house needs off-street parking for the new dwelling and a servicing path for water, sewer or septic, and electrical. On Agassiz acreage, services may sit a long way from the building area, and a well or septic field has a finite capacity that caps how many units it supports. Lots without a workable parking solution or servicing route cannot get a coach-house permit. The fix is to confirm parking, servicing route, and well or septic capacity at the first site visit, before any drawings begin.
Where a new addition 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 result is one weatherproof structure, not two buildings stuck together.
Agassiz suites & additions FAQ
The questions Agassiz homeowners ask us at the site visit. Straight answers on cost, timeline, ALR and floodplain rules, permits, and rental return 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 feasibility puzzle plus a new building stuck to your existing one. Integration is where most projects fail. Here is how Huntley structures the work differently.
Typical Chilliwack contractor
Huntley Construction
Feasibility & engineering
Typical
Owner manages zoning, ALR, and structural engineer separately
Huntley
We coordinate zoning, ALR, floodplain, and structural sign-offs directly
Permit path
Typical
Building, trade, and ALR approvals handled by different parties
Huntley
All permits run through Huntley with the District of Kent 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 delays as electrical and plumbing extend to the new unit
Huntley
In-house Red Seal trades handle extensions on the same schedule
Coach-house servicing
Typical
Owner coordinates trenching, well, and septic capacity separately
Huntley
Servicing and capacity 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
Kitchens
Layout changes, custom cabinetry, islands. In-house trades.
Bathrooms
Full rebuilds, custom showers, ensuites. In-house plumbing.
Basements
Finished basements, legal secondary suites, rec rooms.
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 postHow the recent provincial small-scale housing rules work.
Read postWhen you need a permit, what they cost, and how long they take.
Read postService area
We build suites and additions in Agassiz and across the Fraser Valley. What fits a village-core lot in Agassiz differs from an ALR acreage, a floodplain property, or a tight lot in Sardis or Vedder Crossing. 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.
Feasibility & rental income
We come to your property, check the zoning, ALR status, and floodplain mapping, and talk honestly about what is possible within your budget. Basement suite, above-garage suite, coach house, or addition. You get a clear scope and a line-item quote. No pressure, no mystery pricing.