ADU Contractor in Alhambra, CA | Potato Construction

Alhambra is one of the San Gabriel Valley’s most walkable, tightly-knit communities — a city where multigenerational households are the norm and neighbors have lived side by side for decades. Patrick’s team at Potato Construction has built ADUs across Alhambra and the broader SGV, and we understand exactly what it takes to get a project approved, built, and finished to a standard your family will rely on for years.

What Is an ADU and Why Alhambra Homeowners Are Building Them

An ADU — accessory dwelling unit — is a fully independent living space built on the same lot as a primary single-family home. In Alhambra, we see homeowners building ADUs for three main reasons:

• Multigenerational living. Alhambra’s strong Chinese-American community has always prioritized keeping family close. An ADU gives aging parents or adult children a private space that isn’t a guest bedroom — it’s a real home, steps away.
• Rental income of $2,000–$2,700/month. Alhambra’s proximity to downtown Los Angeles and the Metro A Line makes it attractive to renters. A well-built ADU in this area can generate $2,000 to $2,700 per month.
• Property value. An ADU adds functional square footage and a legal income stream — both of which appraisers recognize. Homeowners routinely see their property value increase by more than the construction cost over time.

Alhambra ADU Rules

California state law governs most ADU standards, and Alhambra follows that framework closely:

• Maximum size: Up to 1,200 square feet for a detached ADU
• Setbacks: 4-foot minimum from the side and rear property lines
• Height: Up to 16 feet for a detached ADU
• Parking: Zero to one parking space required depending on proximity to transit
• Number of units: Up to 2 ADUs per single-family lot

One important practical note: Alhambra lots tend to be smaller than in some other SGV cities. That makes setback planning critical. A design-first, site-aware approach saves time and money.

The Permit Process in Alhambra

1. Free site evaluation. We visit the property, review lot dimensions, existing utilities, and identify any constraints before anything is committed to paper.
2. Plans and design. Our team drafts architectural and structural plans tailored to your lot and goals.
3. Plan check — 4 to 8 weeks. Plans are submitted to the City of Alhambra’s Building Division. Realistic timelines run four to eight weeks for approval.
4. Construction — 4 to 6 months. Once permits are in hand, we break ground. Foundation, framing, mechanical rough-ins, and finishes follow a structured schedule with regular homeowner updates.
5. Final inspection. The city conducts a final inspection before the certificate of occupancy is issued. We coordinate this and walk through the completed unit with you.

What Does an ADU Cost in Alhambra?

Why Families in Alhambra Choose Us

• Bilingual communication in Chinese and English. Many of our Alhambra clients prefer to discuss plans, costs, and timelines in Mandarin or Cantonese. We have those conversations clearly, without relying on a translator.
• Familiar with Alhambra’s permit process. We have submitted plans to the city’s building division multiple times. We know what the plan checkers look for.
• Relationships with local inspectors. Knowing the inspection standards and how they are applied in Alhambra means fewer surprises at final sign-off.
• We are your neighbors. Our office is in Rosemead. We are local, accountable, and part of the same community you live in.

Ready to Build Your Alhambra ADU?

Call us at (626) 777-6666 or stop by our Rosemead office. We are happy to talk through your options in English, Mandarin, or Cantonese — whatever works best for you. Visit us at potatoadu.com.

Potato Construction — ADU Contractor serving Alhambra, CA and the San Gabriel Valley. (626) 777-6666