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Remodeling in North Tustin

ZIP codes: 92705

North Tustin is the largest unincorporated community in Orange County, and its houses show why people stay: custom ranches and split-levels from the 1960s and 70s on genuinely large lots, under mature trees, along hillside streets that were never handed to a city. Unincorporated means the County is the permit authority — plan check and permits run through OC Development Services, not a city hall. It also means the housing stock was custom-built one house at a time, so no two remodels start from the same plan, and a careful survey of what is actually there matters more than in any tract neighborhood.

What working in North Tustin actually looks like

County permitting, not city permitting

Because North Tustin is unincorporated, OC Development Services reviews plans and issues permits. The county process runs largely online and has its own rhythm — different from the city counters most Orange County contractors know best.

Custom houses, custom surprises

These houses were individually designed and individually altered over sixty years. Framing, additions and systems vary house to house, so we open the project with a genuine investigation of the existing structure rather than assumptions from a tract plan.

Large lots reward ambition

Half-acre-scale parcels with mature landscaping give projects room that inner-city lots never have: additions, outdoor rooms and reworked entries are all on the table without crowding a property line.

North Tustin permit notes

North Tustin is an unincorporated Orange County area, so building permits are issued by OC Development Services (OC Public Works) Building and Safety — the County, not a city department — with most applications handled through the county online process. Verified against the Orange County LAFCO and OC Public Works pages, 2026-09-02.

We pull permits in-house — clients don't need to navigate the building department.

Talk to Onn about your North Tustin project.

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Frequently asked questions in North Tustin

Why does my North Tustin permit go to the County? +

Because North Tustin never incorporated as a city. OC Development Services — the County building authority — reviews plans and issues permits for the unincorporated areas, including this one.

How is remodeling a custom 1970s house different from a tract house? +

There is no shared plan to lean on. Every one of these houses was built and modified individually, so the project starts with understanding what is actually behind the walls — and budgets carry a contingency for what sixty years of individual choices left there.

Do hillside streets change the work? +

Sometimes — sloped lots bring drainage and structural questions into play, and long driveways change staging. Both are ordinary parts of a North Tustin site walk.

Also serving nearby:

Tustin · Orange · Villa Park · Irvine

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