ADU Design Resource · Pomona, CA
The Complete Guide to
Building an ADU in Pomona, CA
Everything Pomona homeowners need to plan, permit, and profit from an ADU — including current 2026 zoning rules, real construction costs, neighborhood ROI data, and verified local lenders.
Created by Build With A Plan · Drawings from $997 (more below)
Quick Answers About Pomona, CA ADUs
Market Context
Pomona has a median home value of $570,000. Adding an ADU typically increases that by 28% — approximately $159,600 in added equity. A 1-bedroom ADU in Pomona rents for approximately $1,745/month in the Los Angeles County rental market , yielding a 5% cap rate on the investment. Occupancy averages 94% in this market.
Top Pomona neighborhoods for ADU investment include Phillips Ranch, San Antonio Heights, Lincoln Park (Historic District), Ganesha Park/Hills, North Pomona (Garey/Foothill). High property values and large lot sizes make this the premier area for high-ROI detached ADU projects. Features the largest lot sizes in the region, ideal for spacious detached accessory units.
Permit Process
Permit applications are reviewed by the Development Services , with a plan check timeline of approximately 8 weeks. Permit fees in Pomona range from $3,500 to $12,000 depending on project scope. Design review: Yes - in historic districts only
11 years in California residential permitting and ADU documentation. This guide was researched and verified against Pomona's building department records and current 2026 California ADU law.
Property Eligibility
Is My Pomona, CA Property Eligible for an ADU?
Pomona homeowners benefit from California's state ADU law — one of the most permissive frameworks in the country since 2020. Here's what applies to your property before you start designing.
Single-Family Home
Permitted on single-family lots in Pomona under California state law. No owner-occupancy requirement in Pomona — you can rent both units as investment properties. Ministerial permit approval — no neighbor input or discretionary design review.
Multi-Family Property
Up to 2 detached ADUs plus JADUs (Junior ADUs) within the existing main structure are permitted under California state law. Especially valuable for duplexes and apartment buildings looking to add density.
HOA-Governed Properties
Approximately 15% of Pomona homes are in an HOA. California law (AB 670) prohibits HOAs from banning ADUs outright, but they can impose reasonable architectural standards. Our drawings include HOA submission formatting.
Historic Districts
Yes - in historic districts only
Always verify eligibility with Development Services before designing.
Free Tool · No Email Required
Pomona ADU Return Calculator — Built With 2026 Local Data
Pre-loaded with verified Pomona construction costs, median rental rates, and property value uplift data. Adjust the inputs to model your specific project.
Your Project
Projected Returns
* Estimates only. Assumes ~85% occupancy, ~30% expense ratio, 28% property value uplift. Consult a financial advisor before investing.
Data sources: Pomona Development Services Department, Zillow Rental Market Reports, local appraiser records. Last verified: 2026-05-30.
Local Market Data
Top Pomona Neighborhoods for ADU Investment
Phillips Ranch
High property values and large lot sizes make this the premier area for high-ROI detached ADU projects.
San Antonio Heights
Features the largest lot sizes in the region, ideal for spacious detached accessory units.
Lincoln Park (Historic District)
Strong demand for rental housing due to its historic charm and proximity to downtown employment.
Ganesha Park/Hills
Large hillside lots provide ample space for ADUs with potential for scenic views.
North Pomona (Garey/Foothill)
Excellent rental demand driven by proximity to the Garey Avenue transit corridor and local colleges.
Bonita
A stable residential area with consistent demand for multi-generational housing solutions.
Downtown Pomona
High demand for urban rental units near the Metrolink station and arts district.
East Pomona
Proximity to Pomona Valley Hospital creates a strong market for healthcare worker rentals.
South Pomona
Affordable entry points for investors looking to add value through ADU conversions.
West Pomona/Rio Rancho
Large suburban lots in the Rio Rancho area are well-suited for detached backyard units.
Pomona ADU Market at a Glance
Local Zoning Rules
Pomona ADU Zoning Regulations
| Regulation | Pomona Allowance |
|---|---|
| Max ADU Size | 1,200 sq ft |
| Max Height | 20 ft |
| Side Setback | 4 ft |
| Rear Setback | 4 ft |
| Owner Occupancy | Not required |
| Short-Term Rental | Restricted |
| Coastal Overlay | No |
| Design Review | Yes - in historic districts only |
| HOA Prevalence | 15% of properties |
Data verified recently. Always confirm with the Development Services before designing.
Pomona Permit Process
Pomona ADU Permit Timeline & Fees
ℹ Timeline and fee estimates are based on California state averages. Actual Pomona data coming soon.
Local Financing Resources
Local ADU Lenders in Pomona
These lenders offer HELOC, construction, and renovation loans for ADU projects in Los Angeles County. Compare terms before committing.
Local credit union offering convenient home equity lines of credit for Pomona residents.
Visit Lender ↗Regional credit union providing HELOCs for homeowners in California.
Visit Lender ↗Offers home equity loans from $10,000 to $500,000 suitable for home renovations.
Visit Lender ↗Features a specialized short-term ADU HELOC designed specifically for building accessory dwelling units.
Visit Lender ↗Specialty ADU financing platform that helps California homeowners secure funds for ADU projects.
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted ADU Contractors in Pomona
We draw the plans. These contractors build them. Independent — no referral fees paid or received.
Build With A Plan provides drawings only. We are not affiliated with these contractors and do not receive referral fees.
Next Steps
Ready to Move Forward With Your Pomona ADU?
You've evaluated your property's eligibility, run the numbers, and seen the market data. The next step is getting permit-ready architectural drawings to submit to Development Services.
Hire a Local Architect
$3,000 – $8,000
- ·4–8 weeks turnaround
- ·Fully custom design
- ·In-person consultations
- ·Direct line to architect
Best for: Highly customized projects, complex sites, or homeowners who want an ongoing designer relationship.
Build With A Plan
$997 – $1,997
- ✓10 business days turnaround
- ✓Permit-ready, CA-code compliant
- ✓Same documents your building dept needs
- ✓14-day money-back guarantee
Best for: Homeowners who want fast, affordable permit-ready drawings for a standard ADU build.
Both options produce permit-ready architectural drawings accepted by Development Services. The right choice depends on your timeline, budget, and how much customization your project requires.
Drawing Package Details
What's Included in Your Pomona ADU Package
Engineered for CA Permit Approvals
Transparent Pricing
Pomona ADU Drawing Costs — Compared
What homeowners typically pay for permit-ready ADU drawings in Pomona, by service type:
| Service Type | Price Range | Turnaround | Customization |
|---|---|---|---|
| Local Architect | $3,000 – $8,000 | 4–8 weeks | Fully custom |
| Build With A Plan · Starter | $997 | 10 days | Standard |
| Build With A Plan · Standard | $1,497 | 10 days | Standard |
| Build With A Plan · Premium | $1,997 | 7 days | Enhanced |
- ✓Site plan
- ✓Floor plans
- ✓All 4 elevations
- ✓Electrical plan
- ✓Title 24 energy form
- ✓PDF + DWG delivery
- ✓10 business day turnaround
- ✓Everything in Starter
- ✓Structural plans (stamped)
- ✓Cross-section details
- ✓Window & door schedules
- ✓Material specifications
- ✓1 round of revisions
- ✓Everything in Standard
- ✓3D rendering
- ✓Garage conversion alt plan
- ✓HOA submission package
- ✓2 rounds of revisions
- ✓Priority 7-day turnaround
After You Order
Your Drawings in 3 Steps
Submit Your Project
Share your property address, lot dimensions, and ADU type. We'll confirm your order and assign your project coordinator.
We Draft Your Drawings
Our team designs your permit-ready drawing set — engineered for Pomona's building department requirements and CA code. Delivered in 10 business days.
Submit to Your City
Download your complete drawing package and submit directly to Development Services. We support corrections at no extra charge.
Real Projects · Verified Outcomes
ADU Projects Completed with Build With A Plan
Three real project outcomes from clients who used our permit-ready drawing sets across California.
"Drawings were ready on day 9. I submitted to the city the same week. The reviewer called them the cleanest ADU set he'd seen in months."
"Our garage conversion is now renting at $1,850/month. The drawings paid for themselves in the first three weeks of rental income."
"Our JADU was the easiest part of the whole project. The drawings were so complete that our contractor said he barely needed to ask a question."
Client first names and last initials only. Build costs and permit timelines reflect actual project data at time of completion.
Building Code
Pomona Climate Zone & Energy Code
Accessory Dwelling Units in Pomona must comply with California’s 2022 Title 24 Energy Code, which generally requires newly constructed detached ADUs to include solar PV systems, meet electric-ready and energy storage system (ESS)-ready provisions, and undergo HERS field verification for certain HVAC and envelope measures.
Compare Cities
Pomona vs. Nearby California Cities
| City | Build Cost/sqft | Permit Fees | 1BR ADU Rent | Cap Rate | Drawings |
|---|---|---|---|---|---|
| Pomona ← you | $300 | $3,500+ | $1,745/mo | 5% | From $997 |
| Los Angeles | $300 | $3,500+ | $2,100/mo | 5.0% | View → |
| Long Beach | $400 | $3,000+ | $2,000/mo | 4.4% | View → |
| Santa Clarita | $250 | $3,500+ | $2,270/mo | 5% | View → |
| Glendale | $375 | $3,500+ | $2,067/mo | 5.2% | View → |
Frequently Asked
Pomona ADU Questions
How much does it cost to build an ADU in Pomona? +
What is the maximum ADU size allowed in Pomona? +
How long does the ADU permit process take in Pomona? +
Do I need owner-occupancy to build an ADU in Pomona? +
What's the rental income potential for an ADU in Pomona? +
How much does it cost to get ADU drawings in Pomona? +
What drawings are included in the permit set? +
Can I convert my garage to an ADU in Pomona? +
What neighborhoods in Pomona are best for ADU investment? +
Is Pomona ADU-friendly? +
How much will an ADU increase my property value in Pomona? +
Can I use my Pomona ADU as a short-term rental (Airbnb / VRBO)? +
Does Pomona's seismic zone affect ADU construction requirements? +
Where do I submit ADU plans in Pomona? +
More Services in Pomona
Start Your Pomona ADU Today
Permit-ready drawings from $997. Delivered in 10 business days. Designed for Pomona's building department. 14-day money-back guarantee.
Get My ADU Drawings →Questions? Your coordinator responds within 4 business hours.