Building on Tucson's northwest side
The northwest side runs roughly from Oracle Road west past La Cholla, Thornydale and Shannon toward I-10, and north along Ina, Magee, Cortaro, Overton and Tangerine. Most of it has Tucson 85741 or 85742 addresses, with some Oro Valley and Marana addresses mixed in. It's largely suburban, built out in waves: subdivisions like Orangewood Estates, south of Magee and west of Thornydale, date to the late 1970s, and newer neighborhoods kept filling in to the north and west through the 1990s and 2000s.
That spread of ages means the projects vary from street to street: stucco and roof repairs on homes built in the 70s and 80s, bathroom and kitchen updates on 90s homes, and additions and guest houses on lots of every size.
Three or four possible permit offices
This is the part that trips people up. A Tucson mailing address on the northwest side does not tell you who issues your permit. Depending on the street, your lot could be in:
- Unincorporated Pima County. Much of the area, including Casas Adobes and the former Tortolita community, is county land. Tortolita voted to incorporate in 1997, but the law behind it was struck down, and parts of it were later annexed by neighboring towns. Permits come from Pima County Development Services, and a detached casita follows the county's guest house rules.
- The Town of Marana. Marana has annexed land on the west and north. Its ADU ordinance, adopted in December 2024, only takes effect when the town reaches 75,000 people, so casitas follow the current town code for now.
- The Town of Oro Valley. Some northern neighborhoods are inside Oro Valley, which updated its zoning code for ADUs in December 2024.
- The City of Tucson. Lots closer to central Tucson may be inside city limits, where Arizona's 2024 ADU law applies.
The rules for size, setbacks, kitchens and meters change with each one, so we look up your parcel on the Pima County Assessor site before anything is designed.
Additions and guest houses
The northwest side has a lot of single-story homes on lots with room to grow. A primary suite addition or a garage conversion adds space without giving up the whole backyard, while a detached guest house gives family real privacy. In county areas, lots on septic may need the system checked before a bedroom is added, and lots near the Cañada del Oro, the Santa Cruz or smaller washes may need a floodplain use permit. See our home addition cost guide for what moves the price.
On older northwest side homes, we also check the electric panel and the sewer or septic line early. A panel from the 1970s or 80s may not have room for a new suite's circuits, and an old clay or cast iron sewer line is better replaced during an addition than after it. Knowing that up front keeps the estimate honest.
Repairs on 1970s to 2000s homes
- Stucco. Cracks at windows, control joints and old patch lines, and failing paint on south and west walls. Bigger failures may need a full re-stucco.
- Roofs. Shingle and tile roofs from the 80s and 90s are often due for underlayment or full replacement. Flat sections over patios and additions are frequent leak points.
- Wood and framing. Rotted fascia, patio beams and termite damage. See termite and wood rot repair.
- Bathrooms. Dated tub-shower combos turned into walk-in showers. See bathroom remodels.
One licensed contractor, whatever the jurisdiction
AZ Atlas Builder Group is a family-owned, licensed general contractor (AZ ROC #344537) based in Tucson. We work across the northwest side in the county, Marana, Oro Valley and the city. We walk the site, confirm the rules, give you a written estimate and handle the permit and inspections with our own crew on framing, structural, stucco and roofing.