ADU Builders in
Pasadena, CA
Compare ADU builders and permit-ready options for Pasadena homeowners
Need help choosing a builder?
Tell us about your project and we'll match you with builders that fit your budget + timeline.
Free • No obligation • Reviewed manually
Takes ~1 minute · Or browse builders below ↓
Quick Stats
Directory
- Curated list of ADU builders serving Pasadena.
- Listings are ordered by ADU relevance signals (portfolio evidence, ADU-specific services, clarity, responsiveness).
- Each card shows the clearest city or service-area proof we found for this market.
- Paid placements (when introduced) will be clearly labeled.
6 Builders
GatherADU
Pasadena • Los Angeles CountyLocal proof: Pasadena regulations and service pages are live on GatherADU.
Dwell Homes
Pasadena • Valley VillageLocal proof: Dwell runs a dedicated Pasadena ADU contractor page.
Otto ADU
Pasadena • Los AngelesLocal proof: Otto shows a Pasadena project and names Pasadena in its permit workflow.
Create Construction
Pasadena • BurbankLocal proof: Create Construction has a Pasadena ADU page and Pasadena permit copy.
Villa Homes
Pasadena • Los Angeles CountyLocal proof: Villa publishes a Pasadena permit-and-regulations page for homeowners.
Levi Design Build
Pasadena • Los Angeles CountyLocal proof: Levi lists Pasadena in its ADU service-area roster.
Are you an ADU builder serving Pasadena?
Get Featured or Verified to add photos and priority placement.
Get Featured →More California markets
Compare nearby city guides before you pick a builder.
If your project is near a city border or you want a wider shortlist, use the other market pages below or head back to the homepage hub.
Pasadena ADU Guide
Pasadena homeowners usually have the same four core ADU paths: convert existing space, build a detached backyard unit, add an attached unit, or create a JADU inside the main house. The best path depends on your lot, utilities, budget, and how quickly you want to get through permitting.
Garage conversion ADU
Detached backyard ADU
Attached ADU
JADU (inside main home)
ADU Rules
+
These are the homeowner baselines worth checking first. Always confirm the exact rule with Pasadena Planning, Building, and Pasadena Water & Power before you spend money on plans.
| Topic | Pasadena baseline |
|---|---|
| How many units can I add? | On a typical single-family lot, the usual starting pattern is 1 ADU plus 1 JADU when site conditions and code requirements are met. |
| Max size | Pasadena follows California ADU pathways, so many homeowners underwrite around the 800-1,200 sqft range depending on unit type, lot constraints, and whether the ADU is attached or detached. |
| JADU size | JADUs are capped at 500 sqft and must be created within the existing single-family house or attached non-habitable space. |
| Setbacks | A 4-foot side and rear setback is the common first-pass assumption for new detached ADU work, but existing conditions and fire-separation rules can still control. |
| Parking | Pasadena requires one on-site space per unit or bedroom, whichever is less, but transit and conversion exemptions are common. Replacement parking is not required when a garage or carport is converted for an ADU. |
| Driveway access | The ADU generally shares the driveway with the main house. A second driveway is usually only allowed from an alley. |
| Historic areas | In historic districts or on designated properties, attached and detached ADUs may need to stay out of public view and avoid visible changes that alter historic character. |
| Fees | Pasadena states ADUs 900 sqft or smaller are exempt from the Residential Impact Fee, and city-approved pathways can reduce some plan-check and permit costs. |
| Process help | The city offers free virtual consultations before submittal, plus online ADU applications through MyPermits. |
Cost Breakdown
+
Pasadena ADU budgets usually run a little higher than inland LA County averages when architectural review, grading, utility coordination, or premium finish expectations get involved.
| Project type | Typical all-in cost range (Pasadena) |
|---|---|
| Garage conversion ADU | $110K – $235K |
| JADU (inside main home) | $80K – $155K |
| Attached ADU | $190K – $340K |
| Detached ADU (new build) | $230K – $425K+ |
Biggest budget movers in Pasadena
- Utility coordination with Pasadena Water & Power
- Panel upgrades and trenching on older homes
- Hillside grading, retaining walls, and drainage
- Historic review or design revisions
- Foundation and structural upgrades on garage conversions
- Finish level, windows, kitchens, and bath complexity
Permit and fee notes
Pasadena publishes fee reductions for some single-family ADU projects, especially when the unit is 900 sqft or smaller. That does not make the project cheap, but it can materially improve the numbers on smaller units.
Permit Process
+
Typical flow
- Screen the lot early – verify zoning, access, utilities, historic status, and easements
- Use the city consultation – Pasadena offers a complimentary virtual ADU consultation before plan check
- Prepare plans and engineering – custom plans or a permit-ready concept
- Submit online – Pasadena allows ADU applications and plan uploads through MyPermits
- Plan check and corrections – respond to comments from planning, building, and utilities
- Permit issuance – pay fees and pull permits
- Construction and inspections – final sign-off before occupancy
Realistic timing
- Feasibility + concept: ~2–6 weeks
- Design + engineering: ~1–3 months
- Plan review + corrections: commonly ~2–5 months
- Construction: ~4–9 months
- Total: often ~6–15 months
Where Pasadena is better than average
- Free early consultation reduces avoidable redesign
- Online submittal is easier than cities that still require in-person permit intake
- The city has an established ADU help ecosystem, not just a bare ordinance page
Rental Income
+
Pasadena ADUs usually pencil best as long-term rentals for graduate students, hospital staff, local professionals, multigenerational family, or downsizing parents. Neighborhood, parking, and privacy matter a lot.
What can an ADU rent for in Pasadena?
| Unit type | Broad monthly range |
|---|---|
| Studio / small JADU | $2,000 – $2,500 |
| 1 BR ADU | $2,400 – $3,100 |
| 2 BR ADU | $3,000 – $3,800+ |
Rental strategy notes
- Long-term occupancy is the cleaner default assumption for underwriting
- Smaller ADUs can benefit from Pasadena's strong renter demand near schools, transit, and job centers
- Premium detached units can outperform the range above if privacy, design, and parking are strong
Simple income math
Monthly rent × 12 = annual gross rent
Example: $2,750/month → $33,000/year gross before vacancy, repairs, insurance, and taxes.
FAQs
+
How much does it cost to build an ADU in Pasadena?
A practical Pasadena budget often starts around $110,000 for a conversion and can move past $400,000 for a detached build, especially with utility work, structural changes, or premium finishes.
Does Pasadena allow online ADU permit submissions?
Yes. Pasadena advertises ADU e-permitting through MyPermits, which is a better workflow than cities that still require paper or in-person intake.
Is there any free city help before I submit plans?
Yes. Pasadena offers a complimentary ADU virtual consultation so you can get early staff feedback before plan check.
Do I need parking for a Pasadena ADU?
Sometimes, but not always. Pasadena publishes a one-space-per-unit-or-bedroom baseline with common exemptions for transit access and conversions, and replacement parking is not required when a garage is converted for an ADU.
Are Pasadena ADUs eligible for lower fees?
Some are. Pasadena states that single-family ADUs 900 sqft or smaller are exempt from the Residential Impact Fee, and some approved pathways may reduce plan-check and permit fees.
Are historic properties harder?
Yes. Historic districts and designated properties can add visibility and design constraints, so that screening should happen before you lock in a detached layout.
Can I build a JADU in Pasadena?
Yes. A JADU can be created within the existing single-family residence or attached non-habitable space, and it is capped at 500 sqft.