How Homes Are Measured in Alberta: RMS and Square Footage
Alberta licensees must use the Residential Measurement Standard, which counts only above-grade finished space. Why a 1,200 sq ft bungalow with a finished basement is still a 1,200 sq ft home.
On this pageShow
You're comparing two listings. One is in Edmonton, one is in a small Ontario town. Same price, same bedroom count. But the Alberta home shows 1,400 square feet and the Ontario one shows 1,900. Did you get a smaller house for the same money?
Probably not. You're looking at two measuring systems. Alberta uses a mandatory rulebook called the Residential Measurement Standard, or RMS, and it counts square footage differently than most of the country. Once you know the rules, the numbers make sense, and you'll know what to ask your REALTOR® before you offer.
✅ Key Takeaways:
- RMS only counts finished space that sits entirely above ground level. Basements, even fully finished ones, are measured and disclosed separately.
- Every Alberta REALTOR® must use RMS if they state a size in a listing or on MLS®, so the number means the same thing from house to house.
- A "1,200 sq ft bungalow" with a 1,100 sq ft finished basement is a 1,200 sq ft RMS home, not a 2,300 sq ft home.
What Is the Residential Measurement Standard?
The Real Estate Council of Alberta (RECA) approved RMS in 2016, around the same time a CBC investigation found a Calgary home was actually 20 percent smaller than its listing advertised. RECA says the standard had been in development since 2013, but the timing tells you what it was built to stop: before RMS, agents measured however they liked, and some counted patios, decks, and parking spots as square footage. Misleading condo measurements alone generated over 1,000 complaints in Edmonton in the two years before the standard.
RECA was the first real estate regulator in Canada to require a measurement standard. Today, if a REALTOR® states a size, it must be the RMS size, calculated within 2 percent accuracy.
Why an Alberta Listing Looks Smaller Than Listings Elsewhere
Most provinces have no rule like this. Agents elsewhere sometimes fold garages, sunrooms, below-grade space, or outdoor areas into advertised square footage. Alberta strips that out, so a smaller number on an Alberta listing usually means a stricter measurement, not a smaller house.
What Counts in an RMS Measurement
What Counts as Above Grade
RMS defines grade as the level of the ground around the outside of the home, which can be flat, sloped, or both. A floor level only counts toward the RMS size if it sits entirely above that grade line. If any part of a level is below grade, the whole level is excluded, even if most of it sits above ground.
📊 Key Stat: A 1,200 sq ft bungalow with a 1,100 sq ft finished basement is a 1,200 sq ft RMS home. The basement can have a home theatre and a bedroom, but it doesn't add a single foot to the listed size. It gets reported separately, not folded into the total.
How the Measurement Is Actually Taken
The method depends on home type. Detached houses, semi-detached homes, and townhouses are measured to the outside face of the exterior walls at the foundation, including additions like a sunroom, as long as it's weatherproof and usable year-round. Apartment-style condos are measured at the interior perimeter, or paint-to-paint, meaning the space inside your unit's own walls.
A ceiling height rule matters for lofts, dormers, and 1.5-storey homes: a room needs at least 2.13 metres (7 feet) of height somewhere inside it to count, though sloped-ceiling area with at least 1.52 metres (5 feet) is included too. See our guide on what makes a house detached for how Alberta classifies home types before RMS applies.
Basements, Bi-Levels, and Price-per-Square-Foot Math
This trips up a lot of Alberta buyers, especially with bungalows and bi-levels, where basement space is such a big share of the home. Price-per-square-foot is calculated using the RMS number, not total developed space. A bungalow with a large finished basement can show a high price-per-square-foot on paper, even though its total livable space might rival a two-storey home priced lower per foot. Compare homes on price-per-square-foot alone, and a bungalow can look overpriced when it actually offers more total living space than the RMS number suggests.
What to Ask Before You Buy
Ask your REALTOR® for two numbers: the RMS size and the total developed space, including how the basement was measured. For the legal record of a lot and structure, a Real Property Report is worth knowing about too.
New construction works differently. Builder floor plans aren't always presented like resale MLS® listings, so a quoted square footage can differ from the RMS size once that home resells. Ask whether a builder's quoted size is RMS-compliant.
Curious what your own home's RMS size means for its value? Try our free home value estimate, or browse recently sold homes in Edmonton to see how size and price line up nearby.
🎯 The Bottom Line: RMS tells you the finished above-grade space, measured the same way on every Alberta listing. It doesn't tell you the whole story about basements or total livable area, so always ask for both numbers before comparing homes on price-per-square-foot.
Frequently Asked Questions
Is RMS mandatory for every Alberta real estate listing? Yes. RECA requires every licensed REALTOR® to use RMS when stating a size in marketing or on MLS®. Private sellers without a REALTOR® aren't bound by the rule.
Does RMS include my finished basement? No. RMS only counts floor levels entirely above grade. A finished basement is measured and disclosed, but reported separately from the RMS total.
Why does my Alberta home look smaller than a similar home in another province? Most provinces don't require a standard like RMS, so other markets may include garages, below-grade space, or outdoor areas in the advertised size.
What is the ceiling height rule for lofts and sloped ceilings? A room needs at least 2.13 metres (7 feet) of height somewhere inside it, and sloped-ceiling area with at least 1.52 metres (5 feet) is included too.
How do I find the RMS size of a home I'm interested in? Check the MLS® listing for RMS compliance, or ask your REALTOR® for both the RMS size and total developed space.
Sources: Real Estate Council of Alberta (RECA), Residential Measurement Standard and Licensee Guide; CBC News.
What's your home worth?
Get a free home valuation based on recent sales in your area.
Get Your EstimateKeep reading
What Is an RPR? Real Property Reports in Alberta
An RPR is the legal document that shows where your house, garage, fence, and deck actually sit on your lot. What it shows, how it differs from title insurance, and when to order one.
What Is a REALTOR®? Realtor vs Real Estate Agent in Canada
REALTOR® is not a job title, it is a trademark. What actually separates a REALTOR® from a real estate agent, associate, or broker in Alberta, and why it matters.
What Does Occupancy Mean in Real Estate? Occupancy vs Possession
Occupancy and possession date are not the same thing. The difference, why Alberta possession commonly lands around noon, and what changes when a listing shows a tenant.
What Is a Tandem Garage? Layout, Sizes, Pros and Cons
A tandem garage fits two cars nose to tail in one single-width bay. Here is how the layout works, what it measures, and when it makes sense in Alberta.