How United Build Partners helps La Habra homeowners
We're not a construction company. United Build Partners is an ADU advisory and contractor-matching service: we start with a free review of your property and goals, help you understand what's realistic for your lot under La Habra's rules, and — when it's a good fit — connect you with up to three contractors in our network suited to your project type and neighborhood. From there, you compare proposals and decide who to work with; the licensed contractor you choose handles the actual design and construction.
ADU rules and permitting in La Habra
Like every California city, La Habra's ADU rules build on the statewide floor — ministerial review and a 60-day clock on complete applications (our California ADU laws guide covers the framework). The city codifies its ADU standards in Municipal Code § 18.12.150, updated in 2025.
What's specific to La Habra
- Recently updated ordinance (2025). The City Council adopted Ordinance CC2025-05 in July 2025, amending LHMC § 18.12.150 to reflect current ADU requirements — so older summaries may be out of date. The city's ADU page reflects the current rules; confirm specifics with Planning.
- Accepts County of San Diego pre-approved plans. Unusually, La Habra accepts the County of San Diego's pre-approved building plans for plan check and permitting — but those plans cannot be modified. It's a real streamlining option if a San Diego County plan fits your lot as-is; customization means a standard submittal instead.
- One ADU per qualifying single-family lot. One secondary (accessory) dwelling unit may be located on a residentially zoned lot that allows single-family dwellings and has exactly one existing single-family home. ADUs aren't counted against general-plan density.
- Four-division routing. Building & Safety takes intake, then routes a complete package to the Building, Planning, Engineering, and Public Works divisions — a multi-reviewer process where a complete first submission saves real time.
- HCD has reviewed the local ordinance. California HCD has issued ordinance-review correspondence to La Habra — a reminder that where a local rule and state law diverge, state law generally controls. Our state law guide covers the framework.
Property and lot considerations
La Habra is a largely built-out, established north-Orange-County city — mature single-family neighborhoods with a range of lot sizes, straddling the Orange/Los Angeles county line. Most lots are flat, keeping site work predictable; the deciding questions are usually lot geometry, existing structures, and utility locations rather than terrain. Whether a San Diego County pre-approved plan fits your lot as-is (since it can't be modified) is a specific, useful thing to determine early — a property review helps you gauge it.
Common ADU types for La Habra homeowners
On La Habra's conventional lots, a detached ADU and garage conversion are the common conversations, with a Junior ADU suiting larger single-family homes. If an unmodified County of San Diego pre-approved plan fits your lot, it's worth pricing against a custom design for the streamlining it offers.
Cost factors in La Habra
Orange County construction pricing generally runs above the Inland Empire. La Habra's flat lots keep site work predictable, and an accepted pre-approved plan (used unmodified) can reduce the design line. Anchor against our cost guide and soft-cost categories, then confirm current fees with the city.
Financing your La Habra ADU
Most homeowners fund ADU construction through a HELOC, cash-out refinance, a construction loan, or some combination — see our ADU financing overview and loan payment calculator for how each works. Financing options aren't generally city-specific, but a lender may consider your neighborhood and local rents when evaluating projected rental income as qualifying income.
How our process works
Frequently asked questions
Yes — the City Council adopted Ordinance CC2025-05 in July 2025, updating Municipal Code § 18.12.150. Summaries written before then may be outdated, so rely on the city's current ADU page and confirm specifics with the Planning Division.
La Habra accepts the County of San Diego's pre-approved building plans for plan check and permitting — but they can't be modified. If one fits your lot as-is, it's a genuine streamlining option; if you need changes, you'll follow the standard submittal path instead.
One secondary (accessory) dwelling unit on a residentially zoned lot that allows single-family homes and has exactly one existing single-family dwelling. State law also allows a Junior ADU in many cases; ADUs aren't counted toward general-plan density. Confirm your parcel's specifics with Planning.