Guest Houses and ADUs
ADU Builder in Huntington Beach, CA
Hardey Builds is an ADU builder in Huntington Beach, CA, creating guest houses and garden residences for family, guests and extended stays. Call (562) 257-8121.
Signs a Guest House Fits Your Property and Plans
An accessory dwelling unit, or ADU, is a second, smaller home on the same lot as your main residence. Many owners think of it as a guest house. It has its own entrance, kitchen and bath, so the people staying in it have privacy while remaining close. California law has made ADUs far easier to approve, and many Orange County owners now see one as the best use of an unused garden or garage.
From Plans to Move In
Our ADU Building Process, Step by Step
A guest house is a complete home in a smaller footprint, so it needs the same planning, permits and inspections as a full build. Hardey Builds manages each stage under one team, which keeps decisions, budget and schedule in one place.
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Site Visit and Private Consultation
We study your lot, setbacks, access and utilities, then talk through who will live in the unit. The visit covers the options that suit your property.
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Design and Layout Coordination
We coordinate plans that make a compact space feel generous: considered storage, good light and a layout that suits the people moving in.
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Permits and Approvals
We prepare and track the ADU application and building permit, and coordinate every inspection with the city through final approval.
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Construction and Project Management
Our crew builds the unit under full project management, with steady updates and a site kept orderly for the household still living in the main house.
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Cleanup and Final Walkthrough
We clean the site and walk the finished unit with you, reviewing every fixture, door and finish before move in.
Working With a Detached ADU Builder
A detached ADU stands on its own in the garden, separate from the main house. It offers the most privacy of any ADU type, which matters for long visits and for family members who keep different hours. As a detached ADU builder, Hardey Builds plans the unit as a true small home, with its own foundation, roof, utilities and entry path.
Placement shapes everything else. We look at setbacks, the path from the street, how the windows face the main house, and how much of the garden you want to keep. Running water, sewer and electrical lines from the main house is a large part of the work, so we plan those routes early.
Inside, a well planned guest house feels larger than its footprint. Higher ceilings, good window placement and built-in storage help a compact plan live like a full home. A covered porch or terrace can extend the living space outdoors.
Garage Conversion and Attached ADU Options
Not every lot has room for a new structure in the garden. A garage conversion ADU in Orange County turns an existing garage into a full residence, reusing the slab, walls and roof where they are sound. An attached ADU adds a suite onto the main house with its own separate entrance.
A garage conversion is more than a cleanup. The space usually needs insulation, new windows, a raised or leveled floor, plumbing for a kitchen and bath, and upgraded electrical service. We inspect the existing structure first so you know what can stay and what must be rebuilt. The garage door opening is usually framed in as a wall with windows, which changes the look from the street.
Each option has trade offs in budget, privacy and how much of your property it uses. We walk you through all three during the consultation, so the choice rests on your goals rather than guesswork.
ADU Permits and Pre-Approved Plans in Huntington Beach
Huntington Beach reviews ADU applications through its Community Development Department, and state law requires cities to approve ADUs that meet the rules without a public hearing. That makes approval more predictable than it once was, though a complete, accurate application still matters.
The city also offers a pre-approved ADU program with free plan sets in three styles: California Ranch, Bungalow and Spanish Colonial. These plans can shorten design and review for owners whose lots fit them. We help you decide whether a pre-approved plan suits your property or whether a custom layout serves you better.
Lots in the Coastal Zone may need a coastal development permit as well. We check your property's status early so the approval path is clear before construction is scheduled.
What Shapes the Investment in ADU Construction in Orange County
The investment in ADU construction in Orange County depends mostly on the type of unit, its size and the finishes inside. A garage conversion reuses existing structure, while a detached guest house needs a new foundation, framing and roof.
Utility work is the factor owners most often underestimate. The distance from the main house to the unit, the condition of the existing sewer line and whether your electrical panel needs an upgrade can all change the budget. Site access matters too, since narrow side yards slow material delivery. Finishes such as tile, cabinetry and flooring shape the rest.
Your consultation sets out these factors for your lot so you can compare options side by side. For owners who prefer to spread the cost, financing through Wisetack is available.
Since 2005
Why Hardey Builds
Why Homeowners Choose Hardey Builds as Their ADU Builder in Huntington Beach, CA
Owners comparing ADU builders in Orange County want a team that has built complete homes, not only added rooms. Hardey Builds has been building and renovating homes since 2005 and works under California Contractor License #864044. We bring custom home experience to every guest house, so it is built to the same standard as the main residence.
As your ADU builder in Huntington Beach, CA, we handle planning, design coordination, permits, construction, cleanup and the final walkthrough. You receive clear communication about progress and decisions, and one team is accountable from start to finish.
Our roots in tile and finish work show in the details of compact spaces, where every corner is close enough to notice. Kitchens and baths in our guest houses receive the same care as those in a full renovation.
Building ADUs From Long Beach to Garden Grove
Hardey Builds works as an ADU builder in Huntington Beach, CA and across the cities around it. Owners working with a home builder in Huntington Beach, a home builder in Long Beach, a home builder in Costa Mesa or a home builder in Garden Grove follow the same planning, permit and build process.
Each city sets its own ADU standards within state law, so setbacks, parking rules and fees vary from one to the next. Our permit assistance keeps applications accurate and moving. If you want more space inside the main house rather than a separate residence, home additions may suit you better, and our full list of construction and remodeling services covers related work.
Questions About Building an ADU
Monday to Sunday, 7:00 AM to 10:00 PM
(562) 257-8121Does Huntington Beach offer pre-approved ADU plans?
Yes. The City of Huntington Beach has a pre-approved ADU program with free plan sets in California Ranch, Bungalow and Spanish Colonial styles. These plans can make design and review faster when your lot fits them. Hardey Builds can review your property, tell you whether a pre-approved plan works there, and build it or coordinate a custom layout instead.
Should I build a detached ADU or convert my garage?
It depends on your lot, budget and goals. A garage conversion reuses existing structure and keeps more of the garden, while a detached ADU offers more privacy and design freedom. Parking needs, the condition of the garage and utility routes also matter. Hardey Builds compares both paths during your consultation so you can choose with clear information.
Can an ADU be designed for an aging parent?
Yes. Many owners build an ADU so a parent can live close by with independence. Planning can include a single level layout, wider doorways, a curbless shower, blocking in the walls for future grab bars and lever handles. Hardey Builds coordinates these details during design, when they cost far less than adding them after the unit is finished.
Does an ADU need its own utility connections?
Not always. Many ADUs share water, sewer and gas lines with the main house, while some owners choose separate meters. The right setup depends on your lot, the capacity of existing lines and local requirements. Hardey Builds reviews your utilities during planning so the routes and any panel or line upgrades are part of the scope from the start.
Can a guest house match the finishes of the main home?
Yes, and it often should. Matching roof lines, window styles, exterior materials and interior finishes helps a guest house feel like part of the estate rather than an addition to it. Hardey Builds coordinates tile, cabinetry, flooring and fixtures with what is already in the main residence, so the two buildings read as one considered design.
Plan Your Guest House
Start Planning Your Backyard ADU
A guest house can give your family room to gather or your property a new purpose. The first step is a visit to study your lot, your goals and the options that suit both. Call Hardey Builds, your ADU builder in Huntington Beach, CA, or send a project inquiry, and we will arrange a private consultation.