Hybrid property map
Property possibility reportConfirmed report
Your Property's Possibilities, Clearly Mapped
9603 Gierson Ave Chatsworth 91311
Existing building
1000
Zoning
RE11-1
Lot area · sq ft
11009
Backyard depth · ft
38
Rear lot width · ft
84
Backyard area · sq ft
3177
Perimeter · ft
430
Transportation map
Street view
ZIMAS property map
Possibility 01 · Extra units
Conceptually feasibleDetached Accessory Dwelling Unit
The mapped geometry supports 4 preliminary detached ADU concepts. Final survey, zoning, fire access, utilities, structural design, and permit review remain required.
800 sq ft ADU Rental Income
| Unit | Low monthly | High monthly |
|---|---|---|
| Existing main house 0 bedroom · 1,000 sq ft | $1,670/month | $2,440/month |
| Detached ADU · 1 bedroom 1 bedroom · 800 sq ft | $1,790/month | $2,280/month |
| Total potential gross rent | $3,460/month $41,520/year | $4,720/month $56,640/year |
RentCast long-term rent range with exact-ZIP comparable context. Low and high monthly scenarios are shown instead of one midpoint. Gross potential only; excludes vacancy, utilities, management, taxes, insurance, repairs, financing, and legal or permit restrictions.
1,200 sq ft ADU Rental Income
| Unit | Low monthly | High monthly |
|---|---|---|
| Existing main house 0 bedroom · 1,000 sq ft | $1,670/month | $2,440/month |
| Detached ADU · 2 bedrooms 2 bedroom · 1,200 sq ft | $2,290/month | $2,730/month |
| Total potential gross rent | $3,960/month $47,520/year | $5,170/month $62,040/year |
RentCast long-term rent range with exact-ZIP comparable context. Low and high monthly scenarios are shown instead of one midpoint. Gross potential only; excludes vacancy, utilities, management, taxes, insurance, repairs, financing, and legal or permit restrictions.
Option A · 800 sq ft · One-story detached ADU
A compact first-floor concept sized to the usable yard. Construction is estimated at $215–$235 per square foot.
Option B · 800 sq ft · Two-story detached ADU
A smaller footprint preserves more yard while providing two floors. Construction is estimated at $225–$245 per square foot.
Option C · 1,200 sq ft · One-story detached ADU
A full-size one-story backyard-home concept, shown only when the preliminary mapped site envelope can accommodate it.
Option D · 1,200 sq ft · Two-story detached ADU
A two-story concept with approximately 600 sq ft per floor, shown only when the preliminary mapped site envelope can accommodate it.
Preliminary project cost estimateDetached ADU
Architectural design + permit drawings$4–$6 / sq ft
Structural design + engineering$1–$2.50 / sq ft
Title 24 energy compliance$300 flat
Survey + site plan$1,800–$2,500
Permit coordination$1,500 / permit
Plan check + permit allowance$2,000–$20,000
Design + permit range$11,600–$34,500
Combined planning range$341,600–$484,500
Completed project exampleHatteras One-Bedroom ADU Conversion
View project →