H3 One Source Builder

3 star rating 5 Reviews

(510) 565-4332 Call

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Oakland, CA 94605


  • H3 One Source Builder - Oakland, CA -  Conscientious

    Reviews: 1

    Conscientious (1 review)

    Bottom-line, I agree with the others who rated them negative. The subcontractors he hired & didn't pay put a lien on our home. We had already PAID H3 for their services but he didn't pay them. MESS, big mess!!!

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  • H3 One Source Builder - Oakland, CA -  andersonsalman

    Reviews: 1

    best construction firm found
    andersonsalman (1 review)

    From the ground breaking to the dedication, I found H3Construction to be an effective, professional organization which delivered on its promises. they were responsive and accessible to our concerns, requests....I would recommend H3 for any commercial or public construction project....

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  • H3 One Source Builder - Oakland, CA -  honestreview1

    Reviews: 1

    H3 One Source Builders
    honestreview1 (1 review)

    Hahns, left us high and dry. We paid him for services that NEVER passed inspeciton. I'll post pictures to show you how he left us. Did NOT RETURN PHONE CALLS did this to us and 2 other clients.

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  • H3 One Source Builder - Oakland, CA -  h3onesourcebuilder

    Reviews: 1

    home addition in FREMONT
    h3onesourcebuilder (1 review)

    Excellent service and professional!! we are extremely satisfied with their crew work ethics and attention to problems and details. Our home addition is not possible for Thanksgiving holidays without Hans Ha (owner)'s going extra mile to complete it within two months. They passed 95% of inspections the first time and immediately resolved problems as soon as within that day. We highly recommended H3 Onesource Builder to anybody who wish to have their home projects getting done on-schedule and no-hassle.

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  • H3 One Source Builder - Oakland, CA -  deceivedcustome

    Reviews: 1

    Do NOT use H3 One Source Builder (Bay Area )
    deceivedcustome (1 review)

    The owner Hahns Ha does not return calls and you cannot leave a voice message because his mailbox is full. We are located in San Jose, California. **** H3 started our remodel in April 2008; the owner Hahns is NEVER there when we have an appointment with the city inspectors. He sends one of his workers whose communications skills are not through. We have failed more inspections than passed. **** H3 does not keep with their work schedule timeline - Do NOT use H3 One Source Builder - quality or workmanship is poor, customer service is horrendous ***** **** Our rating is negative stars but that was not available. -* -* -* -* -*

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Business details

Design Services

  • Computer Aided Drafting & Design
  • Construction Administration
  • Construction Estimates
  • Contract Bidding Negotiation
  • Design Development
  • Interior Design
  • Planning
  • Schematic Design

Design Types

  • Commercial
  • Custom Homes
  • Home Additions & Remodeling
  • Multi-Family Homes
  • Retail
  • Warehouse

Fee Structure

  • Cost Per Square Foot

Hours of Operation

  • MON
  • 9:00am
  • 5:00pm
  • TUE
  • 9:00am
  • 5:00pm
  • WED
  • 9:00am
  • 5:00pm
  • THU
  • 9:00am
  • 5:00pm
  • FRI
  • 9:00am
  • 5:00pm
  • SAT
  • SUN

* By Appointment Only

Payments Accepted

  • Cash Only
  • Personal Checks

Year Established


Languages Spoken

  • English
  • Other