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Toronto & the GTA · serving all of Ontario

(905) 301-4032
info@mspermits.com

Legal Second Units · Ontario Building Code

Legal basement second unit permits — drawn, stamped, and approved.

BCIN #511123. Permit-ready drawings in 1–2 weeks, from $1,800. We handle egress, fire separation and ceiling heights so the city approves on the first pass.

  • Egress windows & side entrances sized and detailed to OBC Part 9.
  • Fire & sound separation assemblies, smoke alarms and interconnection.
  • Site measurement and as-built drawings included in every project.
  • We answer the city's comments — unlimited, at no extra cost.
BCIN #511123 5.0 ★ on Google · 7 reviews We submit your application 8 years in practice

Get a fixed quote

From $1,800. Tell us the municipality and your timeline — same-day reply on weekdays.

We measure the site as part of every project.
PDF, images or CAD files. You can select more than one.
Same-day reply on weekdays

How It Works

From first call to approved permit.

01 Fixed Quote You tell us the municipality and scope. We send a fixed fee the same day — no hourly surprises.
02 Site Visit We measure the basement and record existing conditions, then draw accurate as-builts.
03 Permit Set Plans, egress, fire separations and life-safety details — drawn to the OBC in 1–2 weeks.
04 We Submit It We file the application with your municipality for you and answer every review comment on the original scope, at no extra cost.

Recent Second Units

Real permit sets, approved.

Fee Ranges

What a second unit permit costs.

Fixed fees, quoted up front. The scope decides the price, not your budget.

Simple second unit From$1,800 Existing separate entrance, compliant ceiling height, easy egress enlargement, no structural work.
Standard second unit From$2,000 New side entrance or enlarged egress windows, full fire separation design, new kitchen and bath layout.
Complex second unit From$2,800 Walkout or underpinning coordination, two basement units, or retroactive legalization of as-built work.
Triplex conversion From$2,800 Per-unit egress, full fire and sound separations, parking and zoning review.

Site measurement and as-built drawings are part of every project. Common add-ons: basement walkout or new exterior stair $500 · HVAC design and heat loss/gain $900 · minor variance package $1,000.

Fees exclude HST, municipal permit and application fees, land survey, structural engineering and P.Eng stamp, and ESA.

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What clients say

Rated 5.0 on Google.

5.0 7 reviews on Google Read our Google reviews →
“Mateo has been very reliable and easy to work with. He turned over my permit drawings in a couple of days and made revisions very quickly. I'm very happy with his service and will use again in the future.”
Brandon P.Permit drawingsGoogle review
“Mateo helped with a couple of permits. Great guy and knowledgeable.”
Manant B.Multiple permitsGoogle review
“Great experience! Very excellent work and communication to get the job done. Helped me a lot with the permit processes.”
Mohammad B.Permit applicationGoogle review

FAQ

Second unit questions, answered.

How much does a basement second unit permit cost?

Our permit drawing packages start at $1,800 for a simple unit, $2,000 where a new side entrance or enlarged egress is needed, and $2,800 for walkouts, underpinning or retroactive legalization. Fees exclude HST, municipal permit fees, survey and structural engineering. See the full fee ranges.

What ceiling height do I need for a legal basement apartment?

The Ontario Building Code sets minimum ceiling heights for a second unit, and existing basements often sit close to the line. We measure it on the site visit and tell you straight away whether the basement qualifies as-is, needs underpinning, or can use the code's allowances for existing buildings — before you spend anything on drawings.

How long does it take to get the drawings?

1–2 weeks for a permit-ready set from the site visit. Municipal review time is on top of that and varies by city. We answer every review comment on the original scope at no extra cost, so the file keeps moving.

Do I need a BCIN designer for a second unit permit?

When you hire a designer to prepare building-permit drawings in Ontario, the designer generally needs the applicable qualification and registration unless an exemption applies. MS Permit Designs is BCIN #511123, qualified in Residential, Small Buildings and HVAC-House.

Which cities do you serve?

We work across Ontario, with most projects in Toronto and the GTA. Site measurement and as-built drawings are part of every project.

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