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Permit Review Detail

Permit Number: TC-RES-0726-03586
Parcel: 119010900

Review Status: Requires Resubmit

Review Details: RESIDENTIAL ADU v.1

Permit Number - TC-RES-0726-03586
Review Name: RESIDENTIAL ADU v.1
Review Status: Requires Resubmit
Review Date Reviewer's Name Type of Review Description Status Comments
07/13/2026 Bldg Permits - Post Review Express PENDING ASSIGNMENT
07/02/2026 Addressing Validation REQUIRES RESUBMIT For questions: PDSD-Permits@tucsonaz.gov

The permit and plan show to be for an Accessory Dwelling Unit (ADU) and requires to be separately addressed. Please contact Pima County Addressing at addressing@pima.gov or 520-724-9512 to assign/add the units or a new address for this ADU. Please resubmit your plans and all supporting permit documents to reflect the updated address, in addition, a change of address request will need to be submitted in order to properly update the location of this permit.

Instructions can be found here to request change of address: https://www.tucsonaz.gov/files/sharedassets/public/v/2/pdsd/documents/tdc-faq/new-pdfs/sub-records.pdf
07/07/2026 Residential Building REQUIRES RESUBMIT TC-RES-0726-03586
PLAN REVIEW COMMENTS

Plan review for the above referenced structure has been completed. This letter reflects comments to be addressed. For facilitating a shorter back check time, please provide updated plans and calculations with a written response to each of the notated items indicating action taken. Do not cloud the changes made for comment updates; revisions are processed if changes occur after the permit is issued.

SCOPE OF REVIEW:

The scope of this plan review covers architectural, plumbing, mechanical, energy conservation and electrical. All code references are to the 2024 International Residential Code. All features were checked only to the extent allowed by the submittals provided. All portions of this project are assumed to meet or will meet other departmental requirements, conditions, and concerns before permit approval.

GENERAL REQUIREMENTS:

The City of Tucson adopted the 2024 IRC with amendments and building ordinances for all dwellings.

Provide a separate response letter addressing each comment with location of change on the plans.

SITE PLAN:

1. Show the location of connection to the existing sewer line, R106.1.1.

PLANS:

1. Notate a cool (white) roof finish (greater than 60 SRI) as required by the ADU provisions.
2. Show a maximum ½” floor elevation changes at a notated accessible route entrance on the floor plan, R106.1.1. Update detail #1, sheet A5.
3. Provide a minimum 6 mil polyethylene vapor retarder with joints lapped not less than 6 inches between the concrete floor slab and the base course or the prepared subgrade where a base course does not exist, R506.3.3.

SECTIONS - DETAILS:

1. Provide a wall section detail showing ½” anchor bolts with 7” embedment, R403.1.6.
2. Attic space outside of the thermal barrier requires a ventilation calculation for showing the attic vent opening size using 1 to 150 of attic area in compliance with R806.2.

MECHANICAL PLANS:

1. Provide demand calculations in accordance with Manual J standards, M1401.3, M1601.1.
2. Identify the device model number providing an adjustable setting and note the minimum continuous or intermittent setting for providing whole-house mechanical ventilation, R303.4; N1103.6 & M1505.4.

PLUMBING PLANS:

1. The Tucson Water Department limits flow rates for the water meter size in compliance with P2903.7. Show if water meter as existing or proposed.
2. Show the water heater rating/capacity for consistence with the electrical circuit size, R106.1.1.

ELECTRICAL PLANS:

1. Specify high-efficacy luminaires with an efficacy not less than 45 lumens per watt or lamps with efficacy not less than 65 lumens per watt (LED devices), N1104.1. Update the energy conservation note.
2. Show a surge-protective device (SPD) as an integral part of or placed immediately adjacent to the service equipment, E3606.5.
3. Provide GFCI protection for appliance receptacle outlets, E3902.12. Include:
1. Drinking water coolers
2. High pressure spray washing machines
3. Sump pumps
4. Dishwashers
5. Electric ranges
6. Wall-mounted ovens
7. Counter-mounted cooking units
8. Clothes dryers
9. Microwave ovens
10. Provide GFCI protection for receptacle outlets and HVAC equipment after September 1, 2026, E3902.14.

INTERNATIONAL ENERGY CONSERVATION CODE:

1. Energy Certificate: (Mandatory) place near the indoor furnace or in utility room, N1101.14. Add notation to plans.

If you have any questions, please contact:
Kenneth.VanKarsen@tucsonaz.gov
City of Tucson Residential Building Safety
07/07/2026 Residential Engineering REQUIRES RESUBMIT Permit Activity Number: TC-RES-0726-03586 (1st Review)
Project: ACCESSORY DWELLING UNIT - ADU
Location: 3301 S BELMAR AV
Review Date: 7/7/2026
Reviewer: Marco Contreras – Engineering Associate - Site Engineering
Reviewer Contact: Marco.contreras@tucsonaz.gov
Related cases:

Plan review for the above referenced structure has been completed. This letter reflects comments to be addressed to ensure final approval from Site Engineering.
To help speed up your resubmittal and facilitate shorter review timelines, please include a response letter along with your updated plans and any supporting calculations. In your response letter, address each comment individually and explain what changes were made and where they can be found in the plans. Please do not mark or highlight changes in the drawings at this stage — revision markups are only used after a permit has been issued. Submit your response letter and updated plan set as two separate files.
Site Engineering Review Comments:
1. The City of Tucson Inclusive Home Design Ordinance requires all new dwellings — including ADUs, single-family residences, and duplexes — to provide an accessible route connecting the public street, sidewalk, or driveway to an accessible entrance of the home. This pathway must be shown, dimensioned, and labeled on the plans. What this means in plain terms: There needs to be a clearly defined, walkable path from where a person arrives (the street, sidewalk, or driveway) all the way to a usable door of the home — one that someone using a wheelchair or mobility aid could navigate without barriers. An exterior accessible route that shall conform to 2017 ICC A117.1 Sections 402 and 403 and City of Tucson Inclusive Home Design Ordinance. The current plans to no reference a material nor show a connection to ROW sidewalk or Parking area proposed. Ensure dimension the path at the minimum 4-feet required.
Reference: https://www.tucsonaz.gov/files/sharedassets/public/v/1/city-services/planning-development-services/documents/inclusivehomedesignordinance.pdf
Action Items — Show the following on your plans:
• Draw and label the path as "Accessible Route"
• Provide a minimum clear width of 4 feet with a width call-out on the plans
• Note the proposed running slope (must not exceed 5% / 1:20) and cross slope (must not exceed 2% / 1:50)
• Identify the accessible entrance the route leads to

Acceptable Accessible Route compositions include:
• Portland cement concrete (PCC)
• Broom Finished concrete
• Brick or unit pavers (Only if set on a stable cement base with no gaps exceeding ½”)
• Concrete pavers on concrete base (Same joint and evenness requirements as brick)
• Flagstone: must be mortared – loose set does not qualify
• Any surfaces equivalent in smoothness, hardness, and durability
NOTICE: Decomposed granite (DG) is not permitted for required accessible routes, even if compacted
07/13/2026 Residential Zoning REQUIRES RESUBMIT PDSD TRANSMITTAL

FROM: Roxanne Johnston
Planner
PROJECT: TC-RES-0726-03586
3301 S Belmar Av., Tucson, AZ 85745
ADU (1st Review)

TRANSMITTAL DATE: 07/13/2026

This site is located within the R-2 Zone (UDC 4.7.9). A single-family residence is a permitted use in this zone (Table 4.8-2) subject to Use Specific Standards 4.9.7.B.6, .9, & .10.

RESUBMITTAL OF THE FOLLOWING IS REQUIRED: Correct plans, as noted in the comments below, along with a response letter indicating how all Site Zoning comments were addressed.

1. Apply for a Design Development Option (DDO). Per Unified Development Code (UDC) 6.4.5.C.1.b., the building setback requirement along W. 42nd St., is 10’. This requirement also applies to ADUs.
https://onbase.pima.gov/publicaccess/DS_NextGen_Single/etc/cq/results.html?cqid=240&OBKey__552_1=07018

To apply for a DDO, please refer to the following link: https://www.tucsonaz.gov/files/sharedassets/public/v/1/pdsd/documents/planning-amp-zoning/ddo-for-setback-and-height.pdf Submit a DDO application under the Zoning Modification sub-record that you will create. For instructions on how to apply for a sub-record, visit the following link: https://www.tucsonaz.gov/files/sharedassets/public/v/1/pdsd/documents/tdc-faq/new-pdfs/sub-records_071425.pdf For additional questions regarding DDOs, contact Georgia Pennington at georgia.pennington@tucsonaz.gov

Once the DDO has been approved and the appeal period has passed, please submit the following:

a. The DDO Approval Letter
b. All corrections to the site plan (explained in the following comments)
c. A response letter addressing all staff comments.

2. Please add the lot’s legal description to Sheet 2 of 11. SOUTHGATE LOT 3 BLK 8.

3. Correct the lot width. Per the Pima County Assessor’s Office map found at https://www.asr.pima.gov/ParcelData/Map/Arm/MP07/M07018_B08.PDF , the width of the lot is 51.35”. This also aligns with the subdivision document for Southgate found at https://onbase.pima.gov/publicaccess/DS_NextGen_Single/etc/cq/results.html?cqid=240&OBKey__552_1=07018

4. Correcting the lot width will also impact the lot’s square footage. Please add the total square footage of the lot to the site plan.

5. Recalculate Total Lot Coverage on Sheet 2 of 11 (Site Plan). Add all vehicle use areas. Per UDC 6.4.3.b., vehicle use areas are measured within the outside edges of any area allocated to vehicle use, whether improved or unimproved.

6. Provide a landscape plan. Landscaping is required for all new single-family residential, middle housing development, and accessory dwelling units. A landscape plan is to be applied directly to the site plan and the instructions were designed to avoid hiring a landscape architect. Here is the instruction link: https://middle-housing-cotgis.hub.arcgis.com/pages/Residential-Landscaping-Code . Essentially, one tree will be required in the front yard (1 tree per 1,000 sf of new development, rounded up), and then required ground cover is to be provided based on the front width of the lot minus the driveway width multiplied by 5 to arrive at the ground cover requirements. Existing trees are credited but their location must be shown and noted on the plan.

Landscaping is discussed in greater detail in UDC 7.6. https://codelibrary.amlegal.com/codes/tucson/latest/tucson_az_udc/0-0-0-5860#JD_UDCSec.7.6

Show proposed new tree(s), including the planting area basin for each (50 sf or 4 ft radius circle).

Draw any proposed required new groundcover areas and provide the dimensions of the plant bed(s).

In the notes, indicate the preferred watering methos and list the tree and groundcover species selected. These are found in UDC 7.6.8.A.3.

When adding new trees, they need to be planted 5 feet from the sidewalk and 10 feet away from any structure to avoid negative impacts to the foundations by root systems.

7. Additional comments may be forthcoming depending on responses to zoning review comments and plans submitted for the next review.

The Unified Development Code may be accessed here: https://codelibrary.amlegal.com/codes/tucson/latest/tucson_az_udc/0-0-0-1

If you have any questions about this transmittal, please contact Roxanne Johnston at roxanne.johnston@tucsonaz.gov .
07/02/2026 PDSD Application Completeness Express REVIEW COMPLETED