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Serving the Township of Laurentian Valley (Renfrew County)
Modular Homes & Garden Suites in Laurentian Valley, Ontario
Factory-direct modular homes and backyard suites for the Township of Laurentian Valley — the Ottawa Valley township that wraps around Pembroke, covering Alice, Stafford, Micksburg, Forest Lea, Locksley, Shady Nook and Woito. Laurentian Valley is genuinely coach-house-friendly: its Zoning By-law (§3.36, added in 2017) permits a detached secondary dwelling unit as-of-right in every zone that allows a house — including on a rural well-and-septic lot of at least 0.8 hectares (≈2 acres). Here's what the by-law allows, what it costs, and the rules that apply.
What you can build in Laurentian Valley
Full modular homes — from $175,696. 29 models from 560 to 1,405 sq ft, 1–3 bedrooms — factory-built to the Ontario Building Code and set on a permanent foundation (a real, permanent house, not a “trailer”).
Backyard suites (ADUs) — from $96,244. 7 compact models built for garden-suite and in-law-suite use, sized to fit what Laurentian Valley's by-law allows.
All homes are CSA-certified (A277 modular / Z240MH manufactured), finished in the factory, and delivered ready for foundation and hook-up. What's the difference between modular, manufactured, and mobile? →
Find your backyard suite — 3 quick questions
We'll narrow the models that fit a typical Laurentian Valley backyard allowance to the ones that fit your life. No email needed.
1 · Who's it for?
2 · What layout?
3 · What size feels right? (Laurentian Valley lots typically allow up to ~700 sq ft)
Laurentian Valley sets no fixed m² cap — the suite must simply be smaller than your main home (a detached coach house’s footprint can’t exceed the house’s). On a private well+septic lot the decisive gate is a 0.8 ha (≈2 acre) minimum lot size plus a septic-capacity review. Enter your address for the specifics. Your exact lot may allow more or less — get the real number for your address in seconds.
Check your exact Laurentian Valley address →Can you put a garden suite (ADU) in your Laurentian Valley backyard?
Often, yes — Laurentian Valley permits a detached Additional Residential Unit on most serviced residential lots. The specifics, from Township of Laurentian Valley Comprehensive Zoning By-law 08-04-391, §3.36 — Secondary Dwelling Units (added by By-law 2017-06-028; office consolidation June 30, 2024):
| Max size | No fixed m² cap — the suite’s gross floor area must be smaller than your main dwelling’s, and a detached coach house’s building footprint can’t exceed the house’s footprint (§3.36(c)). A coach house is one storey (§3.36(f)); detached accessory buildings in residential zones are generally capped at 5.0 m (≈16 ft) tall. |
|---|---|
| Where it goes | Inside the house, in a garage, or in its own detached building (a coach house) — in every zone that permits a single-detached, semi-detached or townhouse dwelling. One secondary unit per home (§3.36(h)); not in the front yard; at least 2.0 m (≈7 ft) from the main building; the lot must front a maintained street. |
| Height & setbacks | The detached suite takes the SAME side and rear setbacks as your main house (§3.36(d) — e.g. R1: 3.0 m interior side / 7.5 m rear). A coach house is limited to one storey. |
| Parking | 1 space per suite — a tandem space (behind another) counts (§3.36(g)). |
| Servicing | Private well + septic is expressly permitted — the lot must be at least 0.8 ha (≈2 acres) and the septic must be shown to have capacity for the added unit (the Township issues its own septic permits). The serviced pockets adjacent to Pembroke (municipal water, some sewer) carry no lot-size minimum. |
| Conservation | No conservation authority — there is no CA along the Renfrew County stretches of the Ottawa River, so flood review runs through the Township and MNRF. A suite can’t sit in a floodway, an EP/Natural Heritage zone, or within 30 m (≈98 ft) of the high-water mark of any waterbody, and Ottawa River flood-fringe lots carry floodproofing elevation requirements. |
Getting your building permit in Laurentian Valley
An eligible lot still needs a building permit before anything is delivered. Here's how Laurentian Valley's process actually works — verified against the Laurentian Valley building department's own pages.
How do you apply for an ADU building permit in Laurentian Valley?
Through Cloudpermit (online building + septic permit applications) — Township of Laurentian Valley, 460 Witt Road, Pembroke ON K8A 6W5; 613-735-6291; info@lvtownship.ca (application portal ↗). Building and septic permits are submitted online through Cloudpermit; invoices can be paid in person (cash/cheque/debit) at the Township office to avoid the online service fee. The Township is its own septic (OBC Part 8) authority, so the sewage-system permit is filed with the same office. Laurentian Valley's building-permit page ↗
- Confirm zoning — a detached secondary dwelling unit (coach house) is as-of-right under Zoning By-law 08-04-391 §3.36 in every zone that permits a house: smaller than your main dwelling, one storey for a coach house, the main dwelling's side/rear setbacks, not in the front yard, and one unit per home.
- On a private well+septic lot (most of the township), confirm the lot is at least 0.8 ha (≈2 acres) and have the septic system's capacity for the added unit assessed — a new or upgraded system needs a separate Sewage System Permit from the Township (Class 4 leaching bed $429).
- Confirm the lot isn't in a floodway, an EP/Natural Heritage zone, or within 30 m of a waterbody's high-water mark (§3.36(i)) — there is no conservation authority here, so flood review runs through the Township + MNRF (Ottawa River flood-fringe lots have set floodproofing elevations).
- Retain a qualified BCIN designer for the Ontario Building Code construction drawings.
- Apply through Cloudpermit with the drawings, site plan and (rural) septic documentation; respond to any review comments.
- Book inspections through construction plus a separate ESA electrical permit/inspection, then complete the SDU REGISTRATION (By-law 2017-06-029): $120 application + $200 registration after the final inspection — the unit gets its own unit address.
What does a Laurentian Valley ADU permit application need?
- Application to Construct or Demolish + Schedule 1 Designer Information (BCIN) on the drawings
- Site plan showing property lines, all structures, setbacks from the lot lines and the main dwelling, the well and septic locations, and the parking space
- Full construction drawings — foundation plan, floor plans, elevations, cross-sections
- On a private-services lot: septic-capacity documentation, and a Sewage System Permit application (with a qualified designer's Schedule 2 septic design) for a new or upgraded system
- SDU registration application (By-law 2017-06-029) after the final inspection
How much does an ADU building permit cost in Laurentian Valley?
From the Township's Consolidated Tariff of Fees By-law 2024-12-067, Schedule 'D' (2025 rates — read from the by-law schedules; annual updates apply). A new detached secondary dwelling unit is charged at the new-residence rate of $0.48/sq ft (minimum $365.63, plumbing permit included) — so an ~800 sq ft coach house is roughly $384–$400 — plus a $130 non-refundable base application deposit. A new Class 4 septic (leaching bed) is $429. The SDU registration adds $120 (application) + $200 (registration). The Township levies development charges on a new house ($3,193.39 single-detached + water/sewer components where serviced, 2026 rates), but a qualifying additional residential unit is generally exempt under the provincial Development Charges Act — confirm the treatment with the Township. All figures are estimates — confirm with the Building Department (613-735-6291).
| Building permit (new residence rate — includes plumbing) | $0.48/sq ft, minimum $365.63 + $130 base application deposit |
|---|---|
| Sewage System Permit (rural lot) | new Class 4 leaching bed $429; Class 2/3 $357.50; Class 5 holding tank $286/yr |
| SDU registration (By-law 2017-06-029) | $120 application + $200 registration (after the final inspection) |
| Development charges | a qualifying ARU is generally EXEMPT under the DC Act — versus $3,193.39 (+ water/sewer components where serviced) for a new single-detached house (2026 rates) |
The Township levies development charges on a new house — $3,193.39 for a single-detached (2026 rates) plus water/sewer components on a serviced lot — but a qualifying additional residential unit (up to two, ancillary to your home) is generally exempt under the provincial Development Charges Act. The Township's DC page doesn't state the exemption explicitly, so confirm the treatment for your project with the Building Department.
How long does an ADU building permit take in Laurentian Valley?
Ontario's Building Code requires a decision on a complete house-class application within 10 business days. A house-class building permit is reviewed within the legislated 10 business days once a complete application is in (allow longer in the spring/summer rush). On a rural lot the septic assessment/permit and, near the Ottawa River or another waterbody, the flood-elevation review are the steps that add time.
Registration: Every secondary dwelling unit must be registered with the Township under Registration By-law 2017-06-029 — $120 application + $200 registration, issued after a Final Inspection Report; the unit receives its own secondary address (e.g. 'Unit 2'). A change of ownership re-registration is $60 (Tariff Schedule 'E').
Worth knowing before you apply
- The permit itself is cheap (≈$400 for a typical coach house) — the structural gate on a rural lot is the 0.8 ha (≈2 acre) minimum lot size for a secondary unit on private services (§3.36(b)), which no fee or study can substitute for.
- The Township is its own septic authority — the septic permit is filed in the same Cloudpermit application flow, and the system must be shown to have capacity for the added unit.
- There is no conservation authority in this stretch of the Ottawa Valley — flood review runs through the Township and MNRF, and a suite can't sit in a floodway or within 30 m of any waterbody's high-water mark.
- The local by-law still caps a home at ONE secondary unit (§3.36(h), pre-Bill-23) — if you're planning two additional units under the provincial rules, confirm the Township's current treatment first.
- Registration is not optional — an unregistered SDU can't get its final sign-off, and building without a permit doubles the fee.
Fees and timelines are estimates from Laurentian Valley's published schedules, verified July 22, 2026. Rates and processes change — always confirm current requirements with the building department before you apply.
Grants & financing in Laurentian Valley
Development-charge relief for additional units — The Township levies development charges on a new house ($3,193 + water/sewer components where serviced, 2026 rates), but a qualifying additional residential unit is generally exempt under the provincial Development Charges Act — confirm the treatment for your project with the Township.
See every program → Ontario ADU Grants Directory
A modular or prefab home on a permanent foundation is financed like any house. CMHC Prefab Plus allows an insured mortgage with as little as 5% down on the first $500,000, with construction funds released in stages. How modular home financing works →
Thinking of the suite as a rental? Run the numbers →
Laurentian Valley modular homes — FAQ
Can you build a garden suite / ADU in Laurentian Valley?
Yes — Laurentian Valley’s Zoning By-law (§3.36, added by By-law 2017-06-028) permits a secondary dwelling unit as-of-right in every zone that permits a house, and it may be a fully detached coach house in your backyard. One secondary unit is allowed per home; it must be registered with the Township ($120 application + $200 registration after a final inspection) and needs a building permit through the Cloudpermit portal.
How big can a backyard suite be in Laurentian Valley?
There’s no fixed m² cap — the suite’s gross floor area must simply be smaller than your main dwelling’s, and a detached coach house’s footprint can’t exceed the house’s footprint (§3.36(c)). A coach house is limited to one storey. Side and rear setbacks match your main dwelling’s. Enter your address for the specifics.
Can you build an ADU on well and septic in Laurentian Valley?
Yes — expressly. On private services the by-law requires a lot of at least 0.8 hectares (≈2 acres) (§3.36(b)) and adequate servicing must be demonstrated, including septic capacity for the added unit. The Township is its own septic (OBC Part 8) authority — a new Class 4 leaching-bed permit is $429. Most of the township outside the Pembroke-fringe serviced pockets is on private well and septic.
Can you put a modular home in Laurentian Valley, Ontario?
Yes. On land you own, a CSA A277 modular home on a permanent foundation is legal residential housing under the Ontario Building Code throughout Laurentian Valley — as the principal dwelling or as a detached secondary dwelling unit (coach house). Note a mobile home is different: it isn’t permitted on an individual lot except as a temporary garden suite.
How much does a modular home or backyard suite cost in Laurentian Valley?
Modular home models start at $175,696 and run to about $338,000 for the largest layouts; backyard ADU models start at $96,244. Site work, foundation, delivery, and permits are additional.
Can I get a mortgage on a modular home in Laurentian Valley?
Yes — on a permanent foundation it is financed as real property, including via CMHC Prefab Plus (5% down on the first $500,000).
Local rules summarized from Township of Laurentian Valley Comprehensive Zoning By-law 08-04-391, §3.36 — Secondary Dwelling Units (added by By-law 2017-06-028; office consolidation June 30, 2024); verified by Modular Homes 400 and reviewed by James Clarke, REALTOR®. Always confirm current requirements with the City of Laurentian Valley before you build.