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Home remodeling · Design & build · Southern California

Interiors shaped
around the way
you live.

Complete home remodeling with Japanese attention to detail—from first ideas and material choices to construction and finishing.

Request a free consultation View selected work
大

Licensed, Bonded & InsuredCalifornia Contractor License No. 1071937 (Class B)

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01

Serving Southern CaliforniaOrange County · Los Angeles · San Diego

02

Residential & CommercialOne trusted partner, from repair to remodel

03

Complimentary estimatesAvailable in select service areas

私たちについて

About Ohtani

Interior concept sketch and material studyConcept / Detail
Design + buildFrom the first line
to the final detail.

A lifelong partner for your home and business

Built around trust.
Finished with precision.

From minor repairs to kitchen and bathroom remodels, home additions, and even property sales, Ohtani Construction provides comprehensive, one-stop services with honesty, precision, and Japanese craftsmanship.

We aim to be the most trusted construction company in Los Angeles, Orange County, and San Diego—a lifelong partner for your home and business.

OHTANI / 01

Complete home remodeling

One vision,
through every room.

We rethink the way your interior looks, feels, and functions—from kitchens and living spaces to custom storage, lighting, bathrooms, and Japanese architectural details. Every decision is coordinated by one trusted team.

  • 01 Kitchen & living spaces
  • 02 Layout & built-ins
  • 03 Japanese interiors
  • 04 Bathrooms & finish work
Plan your remodel
特別プラン

Special offers

Japanese bath & kitchen remodeling

A daily ritual,
beautifully rebuilt.

Explore three levels of Japanese bathroom design, plus a focused kitchen remodeling offer—each shaped around your home.

01 / Japanese bathroom specialComplimentary consultation

The Onsen Collection

Serenity, crafted
in wood & stone.

A made-to-measure Japanese bathing experience, designed with calm proportions, natural materials, and the ritual of a deep soaking bath at its heart.

Ofuro soaking bathsNatural wood & stoneCalm minimal spacesMade-to-measure layouts
Japanese-inspired bathroom with a deep soaking tub and natural finishesOHTANI / ONSEN
静かShizukaStandard

A clean, essential approach to the Japanese bath.

01
雅MiyabiPremium

A more refined take, with added warmth and detail.

02
輝きKagayakiLuxury

Our most elevated, onsen-inspired experience.

03

Complimentary design consultation Talk with our team about your Japanese bathroom project.

Start your project
Warm contemporary kitchen with custom cabinetry and island02 / Kitchen
Kitchen remodeling specialFree estimate

Designed around real life

Better flow.
Warmer gatherings.

A coordinated kitchen remodel bringing together layout, cabinetry, counters, lighting, and finish work through one trusted team.

  • Layout and workflow planning
  • Cabinetry, counters, and backsplash
  • Lighting, flooring, and finish work
Request the kitchen offer

Every home is different. Final scope, pricing, and eligibility are confirmed after consultation.

施工事例

Selected work

An interior design collection

Spaces designed
with intention.

A visual collection of residential, Japanese, and commercial interiors—each shaped around the people who use it every day.

Japanese-Californian kitchen and living room concept01 / 04View project
Residential interior

Kitchen & everyday living

Custom cabinetry · Island · Lighting · Finish work

Contemporary Japanese tatami room concept02 / 04View project
Japanese interior

A room for quiet rituals

Tatami · Shoji detail · Traditional finish

Japanese-inspired spa bathroom concept03 / 04View project
Bathroom remodeling

A calmer daily routine

Glass shower · Tile · Fixtures · Accessibility

Contemporary Japanese restaurant interior concept04 / 04View project
Commercial interior

Hospitality, built into the space

Dining room · Lighting · Millwork · Operational flow

Every project begins with a space, a need, and a conversation.

Request a free consultation
サービス

What we do

Residential & Commercial Services

One trusted team.
Every part of your space.

Premium residential kitchen and living room concept
01 / Residence

Homes designed
around real life.

  • Home Repairs & Maintenance
  • Home Remodeling
  • Kitchen & Bathroom Remodeling
  • Room Additions
  • Garage Conversion
View our work
Premium contemporary Japanese interior concept
02 / Japanese Interior

Tradition, quietly
integrated.

  • Japanese-Style Tatami Room
  • Tea Room
  • Japanese Washlet Installation
  • Japanese-Style Bathroom
  • Custom Japanese-Style Projects
View our work
Premium Japanese restaurant interior concept
03 / Commercial Interior

Spaces that work
as beautifully as they look.

  • Renovation & Remodeling
  • Office Renovations
  • Restaurants
  • Retail Stores
  • Repair & Maintenance
View our work
進め方

Our process

Clear from start to finish

Care at every step.

From the initial consultation to project completion, we provide transparent communication, fair pricing, and reliable craftsmanship every step of the way.

  1. 01

    Listen

    We learn about your space, priorities, timeline, and the way you want to live or work.

  2. 02

    Plan

    We shape a clear scope and estimate, with honest guidance before construction begins.

  3. 03

    Build

    Our Japanese site managers oversee trusted partner teams with precision and care.

  4. 04

    Deliver

    We complete the work to a high standard and leave the job site clean, organized, and safe.

Complimentary estimates available in select service areas

Client feedback

Trust, felt throughout
the entire project.

Real experiences from homeowners across Orange County.

“The entire process was completely stress-free.”Costa Mesa Resident · T Family+

After purchasing our home and during my pregnancy, we asked Ohtani Construction to remodel both the kitchen and bathroom at the same time. Since my due date was already set, we wanted to work with a company we could trust to complete the project on schedule, and Ohtani Construction delivered exactly that.

Throughout the renovation, they were very considerate of me as an expectant mother—always letting me know when there would be noise, odors, or use of chemicals, and carefully covering the house to minimize any impact. Thanks to their thoughtfulness, the entire process was completely stress-free, and the work was finished right on time. The results are beautiful, and I couldn’t be happier with how everything turned out.

Project: Kitchen Remodel, Bathroom Remodel
“I felt completely at ease knowing I could trust them.”Tustin Resident · M Family+

Due to the unusually heavy and continuous rain, we asked Ohtani Construction to repair roof leaks, replace damaged tiles, and fix areas that had deteriorated over time. The staff who worked on our roof did an exceptionally thorough job, even taking the initiative to repair areas that we hadn’t specifically requested.

They took photos before and after the repairs and explained everything in a way that was easy for me to understand. After completing the work, they cleaned up all debris meticulously and left the area spotless, which truly impressed me.

Project: Roof Leak Repair, Skylight Replacement
“I appreciated being able to discuss everything with them.”Laguna Woods Resident · E Family+

We asked Ohtani Construction to install a bidet toilet seat. Due to the structure of my house, the project turned out to be more complicated than originally expected, but they handled everything with great patience.

They also worked on dismantling the backyard patio and converting a second-floor door into a window, scheduling the construction around my online class times so it wouldn’t disrupt my work from home. I really appreciated being able to discuss everything with them and get thoughtful advice throughout the process.

Project: Toilet and Bidet Installation, Patio Demolition, Door-to-Window Conversion

Our motto

Omotenashi,
on every job site.

Founded in 2016 in Irvine, California, we began serving clients primarily in Orange County and have since expanded our work to Los Angeles and San Diego.

Our Japanese project managers bring the spirit of omotenashi (wholehearted service) to every site, ensuring peace of mind through meticulous supervision and care.

Three promises

  1. 一

    We work for the trust and happiness of our clients.

  2. 二

    We protect and nurture homes and businesses with sincerity and care.

  3. 三

    We contribute to our community as proud members of the Japanese-American community in Orange County and Los Angeles.

Your project starts with a conversation

Let’s build something
that lasts.

Tell us about your home, business, or Japanese bathroom project. We’ll listen carefully and help you find the right next step.

Request a free consultation Call us949-561-8539
Request a free consultation