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james@jarviscontracting.ca(289) 892-4169Home additions & renovations
Durham Region & the Greater Toronto Area
Municipality
Town of Ajax
Facts checked
6 October 2026

Includes Pickering Village.

Confirm with the building department before you apply.

More about building in Ajax

Architectural design and permit drawings in Ajax

The Ajax rules that apply are in the tables below. What it costs, how the job runs and our finished jobs are on the architectural design and permit drawings page.

Bathroom renovations in Ajax

The Ajax rules that apply are in the tables below. What it costs, how the job runs and our finished jobs are on the bathroom renovations page.

Design-build in Ajax

The Ajax rules that apply are in the tables below. What it costs, how the job runs and our finished jobs are on the design-build page.

Permits and rules in Ajax

Every line links to the page it came from, with the date it was checked.

Applying for a permit in Ajax

Applying for a permit in Ajax, Ajax
ItemWhat appliesSource
Where to applyOnline Application Portal (OAP), eapply.ajax.caajax.caChecked 5 October 2026
In the source's words
Applications for building permits, demolition permits, sign permits, plumbing permits, and alternative solutions are either submitted through our Online Application Portal (OAP)
Phone905-619-2529ajax.caChecked 5 October 2026
In the source's words
Call the inspection line at 905-619-2529
Emailbuildingpermits@ajax.caajax.caChecked 5 October 2026
In the source's words
or by emailing buildingpermits@ajax.ca
Fee by-lawSchedule A to Building By-law 48-2023, Classes of Permits, Fees and Refunds, January 1, 2026ajax.caChecked 5 October 2026
In the source's words
SCHEDULE “A” TO BY-LAW NUMBER 48-2023 CLASSES OF PERMITS, FEES AND REFUNDS January 1, 2026
Permit decision time (Ontario)10 days for a house where no dwelling unit is located above another dwelling unit (except retirement homes), and for a detached structure serving it up to 55 m² building areapublications.gov.on.caChecked 5 October 2026
In the source's words
a house where no dwelling unit is located above another dwelling unit.

Building permit fees

Building permit fees, Ajax
ItemWhat appliesSource
New house permit fee$14.22 times the floor area; the Ajax schedule doesn't say whether the area is measured in m² or sq ftajax.caChecked 5 October 2026
In the source's words
A4 Group C - Residential Detached, Semi-Detached, Duplex, Triplex, $14.22
Addition permit fee$14.22 times the floor area; the Ajax schedule doesn't say whether the area is measured in m² or sq ftajax.caChecked 5 October 2026
In the source's words
Section A: CONSTRUCTION of new buildings, additions to existing buildings, including mezzanines
Interior alteration permit fee$7.16 times the floor area; the Ajax schedule doesn't say whether the area is measured in m² or sq ftajax.caChecked 5 October 2026
In the source's words
B5 All other Residential Occupancies $7.16
Basement finish permit feeNot verified yetNot verified yet
Additional residential unit permit fee$9.68 times the floor area; the Ajax schedule doesn't say whether the area is measured in m² or sq ft (item B3, the schedule's only additional-unit line; it doesn't say whether a new detached unit is charged here or as a new house under A4 ($14.22))ajax.caChecked 6 October 2026
In the source's words
B3 Group C - Residential Accessory Dwelling Unit $9.68
Accessory building permit fee$216 flatajax.caChecked 5 October 2026
In the source's words
B11 Detached or Semi-detached Carport/Garage(2) $216
Deck$146 flatajax.caChecked 5 October 2026
In the source's words
B12 Deck/Platform/Porch (unenclosed) $146
Minimum permit fee$146 flatajax.caChecked 5 October 2026
In the source's words
Minor Permits - $146
Below-grade entrance$329 flatajax.caChecked 5 October 2026
In the source's words
B10 Below Grade Entrance $329
Work not listed in the schedule1.5% of estimated construction valueajax.caChecked 5 October 2026
In the source's words
where a fee is not listed in Table 2, the permit fee shall be calculated on the basis of 1.5% of the estimated construction value
Demolition$0.26 per m²ajax.caChecked 5 October 2026
In the source's words
Demolition Permit 5.3 $0.26 per square metre of floor area
Foundation or unfinished basement$4.39 times the floor area; the Ajax schedule doesn't say whether the area is measured in m² or sq ftajax.caChecked 5 October 2026
In the source's words
B13 Foundation/Unfinished Basement $4.39
Refund with a Registered Code Agency20% fee refund when a Registered Code Agency is usedajax.caChecked 5 October 2026
In the source's words
20% of the applicable permit fee paid shall be refunded where an application was made using a Registered Code Agency

Fees as the municipality's 2026 schedule prints them. A rate with no single number shows the rule instead.

Development charges on a new house

Development charges on a new house, Ajax
ItemWhat appliesSource
Ajax (municipal)$45,279ajax.caChecked 5 October 2026
In the source's words
Single Detached Dwelling $45,279 $7,535 $76,227 $129,041
Durham Region (regional)$76,227media-003-ca.cdn.govstack.comChecked 5 October 2026
In the source's words
Total of All Charges $76,227
School boards (education)$7,535ajax.caChecked 5 October 2026
In the source's words
Single Detached Dwelling $45,279 $7,535 $76,227 $129,041
Total, as published$129,041ajax.caChecked 5 October 2026
In the source's words
Single Detached Dwelling $45,279 $7,535 $76,227 $129,041
NoteSince November 3, 2025 (Bill 17), DCs for non-rental residential buildings are payable at the earlier of occupancy permit or first occupancy; EDCs still due at permit issuanceajax.caChecked 5 October 2026
In the source's words
Board of Education Development charges are due at time of Building permit issuance for all applicable development types.
Note (2)Town DC interest rate 5.45% from July 1, 2026 (prime 4.45% + 1%)ajax.caChecked 5 October 2026
In the source's words
July, 1 2026 4.45% 5.45%
Additions to an existing house (Ontario)Enlarging an existing residential unit (e.g., an addition) does not trigger development chargesontario.caChecked 5 October 2026
In the source's words
does not satisfy the requirements of subsection (2) if the only effect of the action is to permit the enlargement of an existing residential unit
When charges are paid (Ontario)Since Nov 3, 2025, DCs on residential development (other than rental) are paid in full at the earlier of occupancy permit issuance or first occupancy, instead of at building permitontario.caChecked 5 October 2026
In the source's words
shall be paid in full on the earlier of, (a) the day a permit is issued under the Building Code Act, 1992 authorizing occupation of the building; and (b) the day the building is first occupied.

Per single or semi-detached house, rates as of 2026-07-01.

Zoning and minor variances

Zoning and minor variances, Ajax
ItemWhat appliesSource
Zoning by-lawZoning By-law 95-2003 (Office Consolidation March 6, 2026)ajax.caChecked 5 October 2026
In the source's words
Zoning By-Law 95-2003 is a comprehensive Zoning By-Law that was passed by Ajax Town Council on July 14, 2003.
Lot coverage (typical residential zone)45% in R1-C to R1-F and R2-A zones; 30% R1-A and 33% R1-B (45% with an ADU)ajax.caChecked 5 October 2026
In the source's words
Maximum 20 % 30% 33% 45% 45% 45% 45% 45% 50% 50% 30% 35% 30%
Height (typical residential zone)11.0 m in R1 and R2 zonesajax.caChecked 5 October 2026
In the source's words
Maximum N/A 11.0 11.0 11.0 11.0 m 11.0 m 11.0
Minor variance (Committee of Adjustment) fee$1,638.90 flatajax.caChecked 5 October 2026
In the source's words
Minor Variance: Residential Minor (single or semi-detached dwellings, duplex, triplex, townhouse dwellings, or detached accessory dwelling unit) - Single Variance $1,638.90
Committee of Adjustment: application formApplication for Minor Variance, Form PLD-026 (revised 27 February 2026)ajax.caChecked 6 October 2026
In the source's words
Form PLD-026 Revised: 2026/02/27
Committee of AdjustmentApplications, schedule and decisionsajax.caChecked 5 October 2026

Additional units: basement apartments, garden suites, coach houses

Additional units: basement apartments, garden suites, coach houses, Ajax
ItemWhat appliesSource
Homes allowed on one lot4, the house includedajax.caChecked 5 October 2026
In the source's words
Two attached accessory dwelling units and one detached accessory dwelling unit.
Detached unit sizeground floor area less than the house's (and, as an accessory building, within the cap on all accessory buildings together: 60 m² or 10% of the lot (s.4.1.1))ajax.caChecked 6 October 2026
In the source's words
Has a maximum ground floor area less than the ground floor area of the principal dwelling located on the same lot;
RuleUp to three attached accessory dwelling units, or two attached plus one detached (max one detached), on lots with a detached, semi, linked villa or townhouse dwellingajax.caChecked 5 October 2026
In the source's words
Two attached accessory dwelling units and one detached accessory dwelling unit.
Rule (2)Detached ADU: ground floor area less than the main house's; at least 3.0 m from any other building; meets the accessory building standards; 1.2 m path to a street, driveway or laneajax.caChecked 6 October 2026
In the source's words
Has a maximum ground floor area less than the ground floor area of the principal dwelling located on the same lot;
Rule (3)ADUs not permitted on hazard lands (flood or erosion limits) as determined by the Conservation Authorityajax.caChecked 5 October 2026
In the source's words
Are not located on lands determined to be hazardous by the applicable Conservation Authority
Rule (4)Lot coverage rises to 45% when the lot includes one or more accessory dwelling unitsajax.caChecked 5 October 2026
In the source's words
The maximum lot coverage shall be 45% in cases where the lot includes a duplex dwelling, triplex dwelling, quadruplex dwelling, or one or more accessory dwelling unit(s).
Rule (5)All accessory buildings on a lot, a detached ADU included (s.4.4.2(iii)), together max 60.0 m² of ground floor area or 10% of the lot area, and within the zone's lot coverage, whichever is leastajax.caChecked 6 October 2026
In the source's words
The aggregate ground floor area of all accessory buildings and structures on a lot shall not exceed any of the following: a) A maximum of 60.0 m²; b) 10% of the lot area; or; c) The lot coverage standard for the applicable zone when combined with any buildings and/or applicable structures on the lot.
Rule (6)Accessory building height max 4.5 m; 6.1 m where a detached ADU sits on the upper floor over a detached garage reached by a driveway or laneajax.caChecked 6 October 2026
In the source's words
no part of such accessory building or structure may be located more than 6.1 metres above the established grade;
Three units as of right (Ontario)On a parcel of urban residential land, municipalities cannot prohibit: 2 units in a detached/semi/rowhouse plus 1 unit in an ancillary building, OR 3 units in the house with none in an ancillary buildingontario.caChecked 5 October 2026
In the source's words
three residential units in a detached house, semi-detached house or rowhouse on a parcel of urban residential land, if no building or structure ancillary to the detached house, semi-detached house or rowhouse contains any residential units

Conservation authority and environmental rules

Conservation authority and environmental rules, Ajax
ItemWhat appliesSource
Conservation authority (1)Toronto and Region Conservation Authority (TRCA)ajax.caChecked 5 October 2026
In the source's words
Your property might be in a regulated area; please reach out to Town Planning staff, the Toronto and Region Conservation Authority (TRCA), or the Central Lake Ontario Conservation Authority
Conservation authority (2)Central Lake Ontario Conservation Authority (CLOCA)cloca.comChecked 5 October 2026
In the source's words
Sheet 1 - Lakeshore Ajax - Halls Road South, Whitby
When its permit is neededTRCA/CLOCA permit for development in regulated areas (valleys, streams, wetlands, floodplains, Lake Ontario shoreline) under O. Reg. 41/24; ADUs barred on CA hazard landsajax.caChecked 5 October 2026
In the source's words
Are not located on lands determined to be hazardous by the applicable Conservation Authority
Its permit feesTRCA private residential: Minor $560, Standard $1,045, Major $1,490+; CLOCA Minor B $535trcaca.s3.ca-central-1.amazonaws.comChecked 5 October 2026
In the source's words
Works on Private Minor $560 Refer to Definitions. Residential Property Standard $1,045
From 2027-02-01: Toronto and Region Conservation Authority (TRCA)Becomes part of the Central Lake Ontario Regional Conservation Authority (Conservation Authorities Act, Bill 97)ontario.caChecked 5 October 2026
In the source's words
“transition date” means February 1, 2027 or such later date as may be prescribed by the regulations
From 2027-02-01: Central Lake Ontario Conservation Authority (CLOCA)Becomes part of the Central Lake Ontario Regional Conservation Authority (Conservation Authorities Act, Bill 97)ontario.caChecked 5 October 2026
In the source's words
“transition date” means February 1, 2027 or such later date as may be prescribed by the regulations
Overlay or local ruleGreenbelt Plan Area: detached ADUs must meet Minimum Distance Separationajax.caChecked 5 October 2026
In the source's words
where a detached accessory dwelling unit is located within the Greenbelt Plan Area, the detached accessory dwelling unit shall comply with the Minimum Distance Separation (MDS) formulae and guidelines.

Heritage

Heritage, Ajax
ItemWhat appliesSource
Heritage Conservation DistrictsPickering Villageajax.caChecked 5 October 2026
HeritagePickering Village Heritage Conservation District (designated 2013), 58 commercial and residential propertiesajax.caChecked 5 October 2026
In the source's words
The Pickering Village Heritage Conservation District was designated in 2013 and is comprised of 58 commercial and residential properties
Heritage (2)31 individually designated heritage propertiesajax.caChecked 5 October 2026
In the source's words
In Ajax, there are currently 31 individually designated properties.
Heritage (3)Heritage Property Tax Rebate: 10% of Town and Education taxes for designated properties with a heritage easementajax.caChecked 5 October 2026
In the source's words
The program provides a 10% rebate on the Town and Education portions of the tax bill.
Heritage (4)Pickering Village Community Improvement Program incentives for heritage propertiesajax.caChecked 5 October 2026
In the source's words
may be eligible for a number of financial incentives available through the Pickering Village Community Improvement Program (CIP).

Building activity

Building activity, Ajax
ItemWhat appliesSource
New residential units in building permits issued (all types incl. ARUs), 2024503media-003-ca.cdn.govstack.comChecked 5 October 2026
In the source's words
Ajax 503 13.9 748 15.1 48.7
New residential units in building permits issued (all types incl. ARUs), 2025748media-003-ca.cdn.govstack.comChecked 5 October 2026
In the source's words
Ajax 503 13.9 748 15.1 48.7
Value of residential building permits ($ million), 2024159.4media-003-ca.cdn.govstack.comChecked 5 October 2026
In the source's words
Ajax 159.4 ... 233.5
Value of residential building permits ($ million), 2025233.5media-003-ca.cdn.govstack.comChecked 5 October 2026
In the source's words
Ajax 159.4 ... 233.5
Average cost of a new single detached dwelling (CMHC, via Durham Region), 20241,512,917media-003-ca.cdn.govstack.comChecked 5 October 2026
In the source's words
Ajax $1,512,917 $1,440,195
Average cost of a new single detached dwelling (CMHC, via Durham Region), 20251,440,195media-003-ca.cdn.govstack.comChecked 5 October 2026
In the source's words
Ajax $1,512,917 $1,440,195
Open datahttps://opendata.ajax.ca/opendata.ajax.caChecked 5 October 2026
In the source's words
Open Data

Counts as the municipality or its open data report them. A partial year is marked; never compare it with a full year.

An open kitchen and dining area: a white oak island with four boucle stools, white cabinets, a fluted oak hood and an oval dining table
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