Statewide pros, local feel
Acton works across California and it shows — their process is dialed in. Standardized floor plan kept costs predictable and the build quality was excellent.
Rachel P. · Homeowner0 found this helpful
License Verified
Acton ADU
Serving Campbell, CA & the surrounding metro · Based in Campbell, CA
Pricing on request — unlock Acton ADU's ADU pricing for your project
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About Acton ADU
Acton ADU is the ADU-focused brand of Acton Construction Inc, a California-licensed general building contractor. Its CSLB license (#638333) has been current and active since February 21, 1992 — one of the longest license track records of any builder in this directory.
Acton ADU ADU pricing
Pricing varies by unit type, size, finishes, and site conditions. Unlock Acton ADU's project pricing for your lot — free, no obligation.
| Unit type | Typical size | Pricing |
|---|---|---|
| Studio / JADU | ≤ 500 sq ft | Pricing locked — unlock to view |
| 1-bedroom detached ADU | 600–750 sq ft | Pricing locked — unlock to view |
| 2-bedroom detached ADU | 750–1,000 sq ft | Pricing locked — unlock to view |
| Garage conversion | 400–600 sq ft | Pricing locked — unlock to view |
| Attached ADU | 400–800 sq ft | Pricing locked — unlock to view |
Pricing is unlocked per project
Share a few details and we'll send Acton ADU's pricing for your build.
Services Acton ADU offers
- Detached ADU
- Attached ADU
- Garage Conversion
What Acton ADU handles
Design & permitting
In-house design and full permit handling.
- Architectural design & 3D renderings
- Structural & Title 24 energy plans
- City plan-check submittal & corrections
Construction
Turnkey ground-up and conversion builds.
- Foundation & framing
- Detached, attached & garage-conversion ADUs
- Electrical, plumbing & HVAC
Financing
Guidance and lender introductions.
- Renovation / construction-loan guidance
- HELOC & cash-out refinance referrals
- ADU-specific (after-build-value) lenders
Project types
ADU formats this builder takes on.
- Detached ADU
- Attached ADU
- Garage / ADU conversion
Warranty & support
What's covered after move-in.
- Workmanship warranty
- Manufacturer materials warranties
- Dedicated project manager
Reviews of Acton ADU
5.044 verified reviews
Rating breakdown
Quality of work4.5
Communication4.8
Timeliness4.8
Value for money4.8
Predictable pricing
The 'starting at' pricing was honest — no bait and switch. They managed permits and inspections end to end. Now renting the unit for solid monthly income.
Miguel A. · ADU owner0 found this helpful
Great experience overall
Smooth from design to final walkthrough. One subcontractor swap mid-project caused a short delay, but they communicated it and kept the budget intact.
Hannah C. · Homeowner0 found this helpful
Would build with them again
Second ADU I've done and the easiest by far. Their team handled the title-24 energy docs and the utility upgrades without me chasing anyone.
Victor N. · Homeowner0 found this helpful
Frequently asked questions about Acton ADU
What does Acton ADU offer?
Acton ADU is a full-service ADU builder serving Campbell, CA, handling design, permitting, and turnkey construction for detached ADUs, attached ADUs, garage conversions, and junior ADUs (JADUs). Acton ADU holds a 5.0-star rating across 44 verified homeowner reviews.
Is Acton ADU licensed and insured?
Yes. Acton ADU is a CSLB license-verified contractor — bonded, insured, and vetted before listing in this directory.
How much does Acton ADU charge to build an ADU?
Acton ADU prices every ADU per project — your cost depends on size, finishes, and site conditions. Garage conversions are the most affordable path; detached units cost more. Pricing is unlocked per project: request a quote to get Acton ADU's exact, no-obligation estimate for your lot.
What areas does Acton ADU serve?
Acton ADU serves Campbell, CA and the surrounding metro. Confirm coverage for your exact address when you request a quote.
How long does Acton ADU take to build an ADU?
Most ADU projects run 6–12 months end to end — roughly 1–2 months for design and permitting (California caps plan check at 60 days for compliant units) and 4–8 months of construction. Acton ADU confirms a timeline for your specific project during the feasibility consultation.
How do I get a quote from Acton ADU?
Tap any "Get a Quote" button on this page to share a few details about your property and project. We'll confirm your service area, match you directly with Acton ADU, and set up your free feasibility consultation — no obligation.
Where Acton ADU works
Campbell, CAService-area map
Street View
- City Building & Safety
- Planning Department
- Permit Center
Other ADU builders near Campbell, CA
Other home services in Campbell
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Pre-ADU Checkup — $499 — Get finalized permits, a pre-ADU checklist, and an on-site feasibility visit. Homeowners save $1,000s by doing this before engaging a contractor.