Harmony Design & Development builds custom ADUs across the San Francisco Bay Area, including detached units, garage conversions, and in-law suites. They manage permits, design, and construction from start to finish.

Harmony Design & Development, San Francisco, CA

About Harmony Design & Development

ADU Construction for San Francisco Bay Area Homeowners

With affordable housing remaining scarce across the Bay Area, accessory dwelling units (ADUs) have grown significantly in popularity in recent years. Harmony Design & Development works with homeowners in the region to plan and build ADUs tailored to their specific situations and property types.

An ADU is essentially a second living space added to an existing property. To qualify, it must have a separate address and include at least one living area, a bathroom, and its own kitchen. Depending on the size of the property and the homeowner's budget, the approach can vary considerably. On larger lots, building an addition to the existing structure or constructing a fully detached ADU may be the preferred route. For those working with tighter budgets or smaller footprints, a garage conversion is a practical and common alternative that makes use of existing space.

There are a number of reasons homeowners choose to pursue an ADU project. Some are looking to generate rental income, while others want to house aging parents nearby rather than moving them to a senior living facility. Others are planning ahead for their own retirement or simply looking to build equity in their property. Harmony Design & Development takes the position that each of these motivations calls for a different solution, and they work to tailor each unit to the homeowner's specific needs.

What to Expect During the Process

Harmony Design & Development follows a structured process from initial conversation through to project completion. Here is an overview of how a typical project unfolds:

  1. Intro Call – An initial conversation to understand the homeowner's goals and introduce the team.
  2. On-Site Consultation – A visit to the property to assess the space and discuss the homeowner's vision in detail.
  3. Fixed-Price Estimate – Once the plan is established, a fixed-price estimate is provided to avoid unexpected costs later on.
  4. Project Planning – Permits are processed and drawings are submitted to the city as required before any work begins.
  5. Design & Materials – Homeowners are guided through design choices and material selections. 3D renderings are provided for kitchens and bathrooms at this stage.
  6. Jobsite Preparation – The work area is prepped and surrounding areas of the home are protected to minimize disruption.
  7. Demolition & Hauling – Depending on the scope, this may include removing walls, building new ones, and updating electrical or plumbing systems.
  8. Remodeling – The finishes and details selected earlier are incorporated to bring the new space together.
  9. Clean-Up & Inspections – The space is cleaned up upon completion, and any required city inspections are coordinated by the team.

ADU Options for Bay Area Properties

Whether the goal is a backyard cottage, an in-law suite, a granny flat, or a converted garage, Harmony Design & Development handles the full scope of the project. Their work as an ADU contractor in the Bay Area covers both attached and detached configurations, with the design and construction process managed from start to finish.

For homeowners considering an ADU, the process involves a number of moving parts — permitting, design, construction, and inspections. Harmony Design & Development aims to manage those steps in a way that keeps the homeowner informed and the project on track.

Services

Harmony Design & Development performs the following services

  • Architecture & Design
  • Permit Specialist
  • Construction
  • Feasibility & Site Assessment
  • Finishing & Fit-out
  • 3D renderings & floor plans

Harmony Design & Development Reviews

Sean Choi

2025-04-13
"I had a chance to interact with Jessica and I want to just say there are much nicer GCs to work with in SF at a much better price. These people are not nice and hard to communicate! The owner is always stressed out and will not respond to your kind requests. Unless you want a GC whos going to never respond to you and will always be stressed out when you reach out, do not go with these people!"

Erin Buchman

2024-05-20
"Great experience on a garage renovation into a new in-law suite bathroom. Good communication, got it done on our timeline, and great, respectful team. Also very competitive on pricing good at working within your budget."

Sylvia Auyeung

2024-05-01
"We had the pleasure of working with Jessica, Daniel and their team for our full kitchen and bathroom remodel. Jessica was able to assist us with our design and provide us recommendations on layout, materials, etc. within our budget. Their project manager Eli provided daily updates and called us immediately when there were issues or questions that required our attention. Well definitely be giving Harmony a call for our next project."

Emily Garvie

2023-02-18
"We renovated the bathroom with Harmony Design Development and had a great experience with the firm. It was my husband's and my first construction project, and we felt like we were in great hands with Jessica, Daniel, and their crew. Harmony's communication was timely and transparent , standards of quality were high, and pricing was fair. We would work with the firm again and have recommend them to friends."

barbara orak

2020-12-01
"I contracted for a full bathroom remodel. Jessica Daniel were my project managers. While their estimate for the project was slightly higher than some of the others I had received, I felt good about the quality of service that I was assured I would get. Both Jessica Daniel seemed honest, genuine, knowledgeable, helpful and reassuring! My bathroom project required a full gut. Everything was removed including the tub. The remodel included updating the electrical and plumbing, installing a new shower, bathroom vent, vanity, light fixture, floors, and painting the walls. Jessica Daniel worked with me on the price and even covered the cost of some of the materials themselves. Throughout the remodel, they called and texted me almost every day with project updates. Whenever I had a question or concern, they worked to resolve it immediately. I was extremely happy with the consistent communication flow. Jessica Daniel made it clear that they wanted me to be completely happy with my new bathroom and in the end, I was thrilled with the outcome! If you need a home project of any size or description completed, give Harmony SF Design Development a call and ask for Jessica Daniel! One Satisfied Client! Barbara"

Specifics

Opening hours

Monday 8:00AM - 7:00PM
Tuesday 8:00AM - 7:00PM
Wednesday 8:00AM - 7:00PM
Thursday 8:00AM - 7:00PM
Friday 8:00AM - 2:00PM
Saturday -
Sunday 8:00AM - 7:00PM

Location

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