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Restored Craftsman bungalow with a deep front porch on a tree-lined street in Santa Ana

Orange County, California

Remodeling and Home Building in Santa Ana

Santa Ana has some of Orange County's oldest and most varied housing. We design, permit and build kitchens, baths, ADUs, additions and new homes that suit it.

Since 1984License #4391664.9/5 client ratingDesign, permits & construction

Services in Santa Ana

What we build in Santa Ana

ADU Builder project in Santa Ana

ADU Builder in Santa Ana

Detached and attached ADUs, garage conversions and JADUs, from feasibility to final inspection.

Santa Ana is the county seat of Orange County and one of its oldest cities, and its housing shows it. Within a few miles you can find Victorian and Craftsman homes from the late 1800s and early 1900s, 1920s and 1930s period revival houses, postwar bungalows and large neighborhoods of 1950s and 1960s ranch homes. Building and remodeling here means working with that history rather than around it.

Mr Build Co. designs, permits and builds projects across Santa Ana, from a single bathroom to a new home. This page covers what is distinctive about building here and links to our detailed pages for each type of project.

What it is like to build and remodel in Santa Ana

Most Santa Ana projects start inside an existing house that has been lived in, modified and repaired for decades. That brings a few constants:

  • Older systems. Knob-and-tube wiring, small electrical services, galvanized water pipes, cast iron drains and clay sewer laterals are common in prewar homes.
  • Raised foundations. Many older homes sit over a crawlspace, which makes plumbing changes easier but often calls for seismic bolting and cripple-wall bracing.
  • Hazardous materials. Lead paint is likely in homes built before 1978, and older flooring, plaster and duct wrap may contain asbestos. Both are tested before demolition.
  • Past unpermitted work. Enclosed porches, converted garages and added bathrooms sometimes need to be brought up to code during a new project.
  • Deep lots and alleys. Many blocks have rear alleys and detached garages, which is why ADUs are so popular here.

The practical result is that a good Santa Ana project budget includes a careful look at existing conditions before the price is fixed. We open the crawlspace, check the panel, test where it matters and, for bigger projects, camera the sewer line. Finding these things during design costs far less than finding them after the new cabinets arrive.

Neighborhoods and housing stock

Historic neighborhoods

French Park, near downtown, holds some of the city's oldest homes, including Victorians and Craftsman houses. Floral Park is known for its 1920s and 1930s period revival homes on wide, landscaped streets. Wilshire Square, Washington Square and Heninger Park add bungalows and revival-style homes from the same era. Homeowners in these areas usually want to keep original details such as wood windows, built-ins, hardwood floors and porches while updating everything behind the walls.

Mid-century tracts

Large parts of the city were built out in the 1950s and 1960s with single-story ranch homes on slab foundations. These houses tend to be structurally simple and good candidates for open layouts, larger bathrooms, additions and second stories, as zoning allows.

Newer homes and attached housing

Santa Ana also has newer infill developments, townhomes and condominiums, many with homeowners associations. Projects in these properties follow the association's rules in addition to the city's.

Permits, historic review and HOAs

The City of Santa Ana's Planning and Building Agency handles residential permits and inspections. Interior remodels follow the standard building permit process. Exterior changes, additions and demolition on properties listed on the Santa Ana Register of Historical Properties, or in historic districts, may need historic review first, and demolition of a historic house may not be approved. The city's Historic Resources Commission oversees that review and Mills Act agreements for eligible properties.

Unlike master-planned cities such as Irvine, most older Santa Ana neighborhoods have no HOA. Some newer tracts and most condo and townhome communities do. ADUs follow California's state ADU laws plus Santa Ana's local standards. Current requirements are posted by the City of Santa Ana.

Projects Santa Ana homeowners take on

Kitchens. Small, closed kitchens in bungalows and U-shaped tract kitchens are the most common rooms we redo. Our page on kitchen remodeling in Santa Ana covers layouts, wall removal and permits in older homes.

Bathrooms. Many prewar homes have a single bathroom with rotted subfloor and original drains. See bathroom remodeling in Santa Ana for what a full remodel or a second bathroom involves.

ADUs. Detached garage conversions and backyard units are in strong demand. Our ADU builder in Santa Ana page explains the options and state rules.

Additions. Rear primary suites, family rooms and second stories on ranch homes. Learn more from our room addition contractor in Santa Ana page.

Whole-home remodels. Updating every system and room in a period home while keeping its character is covered on our home remodeling company in Santa Ana page.

Structural and multi-trade work. Seismic retrofits, foundation repair, panel upgrades and combined projects are described on our general contractor in Santa Ana page.

New homes and rebuilds. On lots with non-historic houses, replacing the home can make sense. See demolition and rebuild in Santa Ana and our custom home builder in Santa Ana page.

How we work in Santa Ana

Mr Build Co. is a design-build general contractor, in business since 1984, holding California license #439166. On every Santa Ana project we handle design, plans, engineering and permits, provide a fixed and detailed written scope, and assign a dedicated project manager. Each project starts with a free on-site consultation, where we look at the existing house and talk through what your plans will involve.

Plan your project

Free on-site consultation. Clear written pricing. Design, permits and construction handled by one team.

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Why homeowners choose us

Built on 40+ years of experience

40+Years building in Southern California
130+Homes transformed
50+ADUs delivered
4.9/5Average client rating
Design and construction under one roof

One team owns the plans, the permit and the build, so nothing falls between an architect and a contractor.

Local permitting knowledge

We work with LADBS and the building departments in Beverly Hills, West Hollywood, Manhattan Beach and across Orange County.

Clear, detailed pricing

You get a written scope with line-item pricing before work starts, and changes are priced and approved in writing.

A project manager who answers

One point of contact from consultation to final walkthrough, with scheduled updates instead of chasing.

Client reviews

What our clients say

★★★★★

“Mr Build transformed our outdated kitchen into a beautiful, functional space. The team was professional, organized, and kept us updated throughout the project. The finished kitchen exceeded our expectations.”

Jennifer L.Los Angeles, CA
★★★★★

“We hired Mr Build for our bathroom remodel and couldn't be happier with the results. They helped us improve the layout, choose great finishes, and completed everything with impressive attention to detail.”

David R.Encino, CA
★★★★★

“Mr Build handled our complete home remodel from start to finish. Communication was excellent, the workmanship was high quality, and every room now feels more modern, comfortable, and functional.”

Michael S.Studio City, CA

FAQ

Building and remodeling in Santa Ana

Who issues building permits in Santa Ana?

The City of Santa Ana's Planning and Building Agency handles planning review, building permits and inspections for residential projects. Properties listed on the Santa Ana Register of Historical Properties, or located in historic districts, may also need historic review for exterior changes, additions or demolition. Most interior remodels follow the standard building permit process.

Are there HOAs in Santa Ana?

Most of Santa Ana's older single-family neighborhoods do not have homeowners associations, though many have active neighborhood associations that are voluntary and advisory. Some newer tracts, gated communities and most condominium and townhome developments do have HOAs with architectural rules. If your property has CC&Rs, those rules apply in addition to the city's.

What are the most common remodeling projects in Santa Ana?

Kitchens and bathrooms in older homes, ADUs and garage conversions, rear additions for primary suites or family rooms, and system upgrades such as electrical service, repiping and seismic retrofits. Whole-home remodels of period homes and mid-century tracts are also common, as are a smaller number of tear-down and rebuild projects on lots with non-historic houses.

Can I build an ADU on a historic property in Santa Ana?

Generally yes. State law allows ADUs on single-family lots, including historic properties, though the city can apply standards meant to keep the unit compatible with the historic home. Detached rear units and garage conversions are usually the simplest options. Confirm the requirements for your property with the city before design.

Does Mr Build offer free consultations in Santa Ana?

Yes. We start every project with a free on-site consultation, where we walk the property, look at the existing conditions that affect your plans and talk through scope, permits and next steps. From there we prepare a detailed written scope and fixed price for the work you choose to move forward with.

From the blog

Helpful reading

Modern ADU behind a West Hollywood home with a car parked in the driveway

ADUs & AdditionsOctober 20, 2026

West Hollywood ADU Parking Rules: What You Need to Know

West Hollywood does not require off-street parking for an ADU, even when you convert the garage. The real decisions are about your own cars, your future tenant and the street outside.

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  • Design, engineering and permits handled for you

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