Building an ADU in Valencia usually means two approvals: a City of Santa Clarita permit and, in most tracts, HOA architectural review. The city’s 2026 ADU handout lists 800 square feet for a detached ADU, and garage conversions and Junior ADUs often fit HOA standards most easily.
Master-Planned Neighborhoods, 100 Miles of Paseos, and No Mello-Roos in Some Valencia Tracts
Valencia isn’t one neighborhood — it’s more than a dozen, from Valencia Summit and Valencia Northpark to Fair Oaks Ranch and West Creek, each with its own HOA and character. What ties them together is the paseo system: over 100 miles of paved, grade-separated walking and biking paths that let residents reach Valencia Town Center on McBean Parkway, Six Flags Magic Mountain, College of the Canyons, or CalArts without crossing a street.
For homeowners here, an ADU is a practical way to add space or income to a property that’s already surrounded by some of the valley’s best amenities. A well-designed ADU can fit both the neighborhood’s look and its HOA rules.
Why Valencia Stands Out
Valencia was built around its paseo network from the start, so most neighborhoods connect to parks, schools, and shopping without needing a car. Henry Mayo Newhall Memorial Hospital and the Santa Clarita Valley Medical Plaza sit along McBean Parkway too, which makes an ADU here a practical option for homeowners planning ahead for aging parents who want to stay close to care. Some tracts, like Valencia Summit, carry no Mello-Roos assessment — worth checking for your specific address, since it varies block by block across Valencia.
Benefits of Adding an ADU in Valencia
- Flexible Living Arrangements: House family members or long-term guests while keeping everyone’s privacy intact.
- Rental Opportunities: Proximity to CalArts and College of the Canyons keeps rental demand steady for well-located ADUs.
- Property Value Growth: A well-built ADU stands out in Valencia’s competitive, HOA-maintained resale market.
What’s Different About Building an ADU in Valencia
Valencia sits inside city limits, so ADU permits go through the City of Santa Clarita’s Planning Division under the city’s ADU ordinance (SCMC §17.57.040) — not Los Angeles County. Because most of Valencia is HOA-governed, your design will typically also need HOA architectural review, even though state law limits how much an HOA can restrict an ADU. Run the city’s ministerial review (typically decided within the state-mandated 60-day window for compliant applications) alongside your HOA’s approval process, so you’re not stuck waiting on one while the other stalls.
Valencia ADU quick facts
| Permits | City of Santa Clarita (Planning, then Building & Safety) |
| HOA review | Expected; most Valencia tracts have an HOA |
| Mello-Roos | Varies block by block; some tracts, like Valencia Summit, have none |
| Oak trees | Lots with oak trees need clearance from the city’s Urban Forestry Division |
| Rentals | 30 days minimum for any ADU in the city |
Which ADU types fit Valencia lots?
- Garage conversion: reuses existing structure and keeps exterior changes small for HOA review.
- Junior ADU: a good fit for aging parents who want to stay close to the hospital and medical offices on McBean Parkway.
- Attached or detached ADU: possible where the yard allows, designed to match your HOA’s architectural standards.
How does ADU permitting work in Valencia?
- Planning review. The City of Santa Clarita’s Planning Division reviews every ADU and JADU first. Its office is at 23920 Valencia Blvd, Suite 140, (661) 255-4330. The city’s ADU handout lists the standards.
- Building & Safety plan check. After Planning clearance, plans go to the city’s Building & Safety Division, on paper or through its eService portal.
- Decision. A compliant ADU gets ministerial approval with no public hearing. State law requires a decision within 60 days of a complete application.
- Fees. Expect permit and plan check fees. New living space over 500 square feet generally also triggers school district fees.
See the ADU permit timeline for deadlines and common delays.
Valencia ADU FAQs
Can my Valencia HOA stop me from building an ADU?
No. California law doesn’t allow an HOA to ban ADUs. It can apply reasonable design rules, such as materials, colors, and placement, through architectural review.
Do I need a parking space for an ADU in Valencia?
No. The City of Santa Clarita’s 2026 ADU handout says there are no parking requirements for ADUs or JADUs, and converting a garage into an ADU doesn’t require replacement parking.
How big can an ADU be in Valencia?
The City of Santa Clarita’s 2026 ADU handout lists 800 square feet for a detached ADU and 500 square feet for a Junior ADU. State law says a city’s maximum can’t be below 850 square feet for one bedroom or 1,000 square feet for two, so confirm which limit applies to your design with the Planning Division. See ADU size, setback, height, and parking rules.
Ready to see what fits your Valencia lot? Contact Santa Clarita ADU or call (661) 486-8393 to get connected with a local ADU contractor.
Looking for a builder? See how we connect Valencia homeowners with a local ADU contractor.