Structural Features

MPAC collects information about a number of structural features that may affect the value of your house.

Click on the name of the Structural feature for more details:

Air Conditioning

MPAC’s database notes whether or not a property has a central air conditioning system. For assessment purposes, MPAC does not record portable or window-mounted air conditioner units.

Basement Area

The basement area includes both finished and unfinished areas. The unfinished area includes the total area of a basement, usually below grade, with a ceiling height of five feet or greater. The basement garage area is included with the unfinished basement area.
The finished basement area includes the total floor area of all the finished area(s) in the basement using interior measurements. MPAC categorizes finished basements into recreation rooms, finished basements (typically recreation room, bedroom(s) and bathroom) and basement apartments (self-contained units with kitchen, bathrooms and separate entrance).

Basement height is measured from the top of the basement floor to the top of the ceiling joist or from the bottom of the ceiling joist to the bottom of the concrete pad (default six-inch thickness).


The total number of bathrooms includes both full and half bathrooms.

Full Bathroom
Three or more fixtures and includes a shower stall or bathtub.

Half Bathroom
Two fixtures in any combination, typically a toilet and sink.


This is the total number of bedrooms in the house.


This refers to the physical condition of the house in relation to its age.

Maintained in above-average condition. Not altered from its original construction.

Received regular maintenance.

No normal maintenance. Shows signs of neglect.

No maintenance. Structure abused. Displays significant amount of abnormal deterioration requiring major expense to restore.

Design Type

Click on the name of the design type for more details:


Virtually no exterior sidewall. Roofline forms the shape of an “A” and extends from peak to ground level.


Typically has an age of 100+ years or are built as reproduction homes.

Designated or Heritage

Designation applied to property. Specifically recognized by Federal or Provincial Act, or by municipal by-law, as having historical significance that historical significance specified in act or by-law.


Exterior walls constructed solely of logs. Logs also form interior perimeter walls so that an interior wall finish is not necessary.

Panabode Style (Small Log)

Log homes that characteristically have smaller milled logs. Usually constructed with double-walled construction, tongue-and-groove joints and partition walls of same construction.


Factory-built structures. Transported to site where they are set on foundations and connected to required services.


Four individual units. Usually refers to type of condominium structure which is constructed with four units, each unit having two sides abutting two other condo units in structure.


Built to, and designated with, R-2000 specifications.

Raised Bungalow

First floor and basement are elevated.


Exterior walls constructed of solid stone.

Timber Frame

Construction technique. Identified by visible interior timber framework.


Generally built between 1940-1950.  Simple box floor plan.

Subterranean Home

A house that is built substantially below grade, also called “Earth Shelter Home”. Such homes take advantage of the fairly constant temperature of the earth below the frost line.

Energy Star Designation

A building that is certified with an Energy Star designation.

Earth Home (Rammed Earth & Tire)

Any non-conventional home design that uses alternative or recycled materials for its construction with the intention of minimizing environmental impact and maximizing thermal & energy efficiency.

Passive Solar Design

A house specifically designed to maximize the sun’s rays in winter and minimize them in summer.

Conversion Property - major or total structural changes

This variable is applied when the structural design of a building has been changed such that the building no longer structurally conforms to its original design. For example, a church converted to a single family dwelling

Conversion Property - minor or no structural changes

This variable is used when a property use has changed and requires a different Property Code but the building's original structural design has not substantially changed. For example, a single family dwelling converted to a duplex.

Straw Bale Home

Straw bale construction utilizes straw bales as a structural element and building insulation.

Back-to-Back Townhouse

Townhouses that share a common wall at the side(s) and at the rear.

Wood Foundation

The foundation is not stone or masonry, but instead is a Permanent Wood Foundation (PWF) that is a load-bearing, preservative-treated, wood-framed foundation wall, sheathed with preservative-treated plywood.

C-Can (Storage Container)

A shipping/storage container repurposed into a liveable structure.


MPAC records the total number of fireplaces, including fireplace inserts, in a structure. Acorn fireplaces, Franklin or airtight stoves are not considered fireplaces for assessment purposes.

Full Storeys

Full storeys refers to the number of storey(s) above grade, excluding the basement level. A full upper storey refers to an exterior wall height of five and one half feet or more.

Heating Type

This refers to the principal heating system.

The major heating systems found in homes are:

Heating Code Heating Code Description
EL - electric baseboard
FA - forced air (oil, natural gas or electric)
GR - gravity hot air
HW - hot water
NO - no central heating system
OT - other type of central heat
PL - pipeless hot air
RD - radiant electric
HP - heat pump
AS - airtight stove
IF - in-floor radiant (coil)
ST - Conventional Heating Stove

Fuel Source

Code Description
OL - Oil
NG - Natural Gas
GT - Geo-Thermal
EL - Electric
PE - Corn / Bio Pellet
PV - Photo voltaic (solar panels)
WD - Wood
PR - Propane

Water Heater

The Water Heater code identifies the type of hot water heater used in the structure. The best way to determine the type of water heater is to ask the owner. There are currently seven choices of water heater available in IPS. They are defined below.

01 – Tankless Hot Water – Point-in-Use

02 – Tankless Hot Water – Whole House

03 – Hot Water – Gas

04 – Hot Water – Electric

05 – Hot Water – Propane

06 – Hot Water – Solar

07 – Hot Water – Other

Partial Storeys

MPAC has three subclasses for partial storey.

Three-quarter Storey
The height of the second floor exterior wall is less than 5.5' and greater than 1'.

Half Storey
There is no exterior wall and the roof pitch is greater than ½.

One-Quarter Storey
There is no exterior wall and the roof pitch is less than ½.

Porches and Decks

There are four types of porches or decks.

No roof over porch or deck.

Full roof over porch or deck.

Enclosed - Type 1
Enclosure is not same quality as house. Used seasonally.

Enclosed - Type 2
Enclosure similar in quality to house. Generally, insulated and separately heated for year-round use. Can easily be closed off from main structure.

Primary Structure Information

MPAC uses codes to identify additional structure data elements:

Data Element Code Data Element Code Description
A Premium roof finish (cedar shakes, slate, clay tile).
B Walkout basement.
C Structure built on a concrete slab foundation.
D Overbuilt for neighbourhood. Home is considerably larger and of superior quality compared to most other homes in neighbourhood.
E Underbuilt for neighbourhood. Home is considerably smaller and of inferior quality compared to most other homes in neighbourhood.
F End unit (freehold and condominium townhouses).
G Corner unit (walk-up, high-rise style condominium).
H Penthouse unit. Condominium unit is usually larger than, and not a model similar to, any units on other floors. Penthouse units are usually located on upper floors. 
I Unit on top floor. Condominium unit is a model similar to any unit on other floors but is located on top floor. Usually refers to condominium unit not designated as penthouse unit.
J Ground floor unit with walkout (condominium unit that has a walkout).
K Ground floor unit without walkout (condominium unit that doesn’t have a walkout).
L Open balcony.
M More than one open balcony.
N Enclosed balcony.
O Boat slip.
P Condominium unit next to elevator.
Q Condominium unit next to stairs.
R Condominium unit next to garbage chute.
S Structure close to road. The front living area is less than ten feet from the road or it is not within the setback allowances in the zoning bylaws. “Front,” in this case, is considered to be the road, corresponding to where the property is addressed.
T One bedroom bed & breakfast.
U Two bedroom bed & breakfast.
V Three bedroom bed & breakfast.
W Four to six bedroom bed & breakfast.
X Rear unit. Townhouse or condominium unit built facing rear or inside of property. May overlook parking area or inside courtyard.
Y Infill. Applied to new or newer structure, built in older neighbourhood. Typically, older structure demolished to make way for new structure, or larger lot severed to create new parcel.
1 Former grow-op home – no renovation or repair. This variable is used in cases where a house was a former marijuana grow-op and structural damage has not been corrected.
2 Former grow-op home – renovated & repaired. This variable is used in cases where a house was a former marijuana grow-op but has now been repaired & renovated.
4 Micro-condo/pied-a-terre. Typically found in condominium buildings that operate some of the units as part of a hotel. This applies to small dwelling units that meet the minimal definition of self-contained, but are much smaller than average dwellings designed as primary residences.
5 Private elevator (enclosed cabin with elevator shaft). Refers to a private elevator, comprised of an enclosed cabin and elevator shaft. This is applicable to private freehold residences as well as all condo types.

Split Level

B – Back Split

S – Side Split

Y – Unconventional Split

Urea Formaldehyde Foam Insulation (UFFI)

U - UFFI is present

R - UFFI has been removed

Note: The applicable law prevails to the extent there is any conflict between this information and the current law. This information is not intended to provide legal advice and should not be relied upon as such.