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Accessory Dwelling Units (ADU) Builders and reliable garage conversion contractors
ADU (Accessory Dwelling Unit) Contractors and garage conversion builders

Experienced ADU Contractor in Campbell, California

First step of working with Wise Builders is meeting and looking into the construction plans for your home remodel
Step 1: Let's Get Started
Initial Contact

During our first conversation, our team will ask you a handful of general questions regarding your ADU or garage conversion project so that we can better understand your needs and desires. If it feels like we are a good fit for each other, we will assign an experienced project manager to visit your property for your free in-home consultation.

Free In-Home Consultation

The project manager will arrive on the agreed-upon day & time and examine the location of where you plan to build your ADU. Your project manager will be your main point of contact from this point on so that they can truly understand your vision, style, and design ideas for your ADU project in Campbell.

Scope of Work

If all goes well during the in-home appointment, your project manager will work with you and our office to break down the scope of the project. This phase will include an estimate of pricing for the project, the anticipated process, and the expected timeline for the completion of your new Accessory Dwelling Unit.

Iphone of website of Wise Builders contractors
Wise Builders truck with brand logo and company information
Free in-home consultation

Allow us to show you what we can do for you with our no-obligation, free in-home consultation.

Step 2: Build Framework
Meet At Our Showroom

It is incredibly important to us that you’re able to touch and feel the material finishes available to you so that you can make a confident decision on the design of your ADU. Our showroom in San Jose will feature beautifully designed cabinetry, a variety of exquisite tiles, and many more materials to complete your ADU project in Campbell.

Finalize Gameplan

As you decide on your design and finishes, we will provide you with the final drawings, layout, design, and 3D renderings so that you can truly see how your ADU or garage conversion will look when we complete your project. Your project manager will walk you through all of the possible choices and outcomes you may have before finalizing your project.


At this point, the excitement has built up and we will both be incredibly eager to get started on your dream project! So upon review of all the finalized details, your project manager and our office will work with you to review and sign the contract so that we can finally begin building your ADU unit in the city of Campbell!

Wise Builders showroom in san jose, california with cabinetry and door examples for your home remodel
Doors and cabinet shopping at the Wise Builders Showroom in San Jose for your complete home Remodel
Step 3: Pre-Construction
Obtain Permits

Our team will immediately begin obtaining permits and scheduling appointments with the necessary trade experts to guarantee your home is in the optimal state needed to begin the ADU construction phase. Your project manager will handle this process from A to Z.

Time To Shop!

This is the fun part! Time to shop! You and your project manager will take the time to review all the remaining materials, fixtures, and accessories needed for your ADU Design-Build from our most trusted vendors. These selections will give that final touch to your beautifully designed accessory dwelling unit.


Consistent communication is crucial for a successful process and the peace-of-mind knowing that your project is moving along. Due to our expertise and the care that our project managers have for their projects, you can expect a smooth and transparent process to the completion of your new ADU home in Campbell.

Step 4: Construction Phases

The initial phase of the actual construction will consist of us demolishing the area and removing all of the unwanted materials. Cleaning out the space in a timely manner will ensure that we stay on track with our ADU housing project timeline and prepare us for the framing phase.

Framing and Preparation

Preparation is a key part of a truly smooth installation process, so it is incredibly important that we inspect the space after it’s been demolished and begin the process of framing the structure. As framing is completed, we can then stucco the exterior, interior drywall, plumbing, and other aspects needed to move on to the installation phase.


It’s finally here! The installation process is where your brand new ADU or garage conversion begins to take shape and finally comes to life. Your project manager will ensure that each step is handled with care so that everything is installed in a clean and perfect manner.

Interior home remodel during the construction phase by Wise Builders
Finishing touches of the interior remodel before final inspection by Wise Builders
Step 5: Wrapping Up & Closeout
Review Final Touch-Ups

Once we complete the installation, your project manager will walk through the entire project with you and review the final punch list to ensure that everything was covered and handled properly. Any adjustments or minor tweaks will be handled in this phase of your accessory dwelling unit project in Campbell.

Final Inspection

While it is hard to say goodbye, we know how excited you will be to finally enjoy your beautiful new ADU home. So this final walk-through with your project manager will be the final inspection needed to bring your ADU project to completion.

5-Star Review!

If your project manager made your ADU construction process seamless and enjoyable, then let’s give them the praise they deserve! You can find us on all review websites like Yelp and Google, and it truly warms our hearts to hear the good news directly from you!

Wise Builders logo and branded hard hat, which is the construction hat
Ready to move forward?

Begin your home remodeling project with us today with our free in-home consultation.

The cost of housing over the years has increased significantly. ADU builder in Campbell, CA are utilizing this opportunity to create a steady income stream. These secondary stand-alone properties involve generating passive income through converting and renting additional spaces.

There are significant resale benefits to a Campbell ADU project. This is another reason why property owners all over California are building secondary units to increase the market value of their homes. It can also be used as an extra room for relatives or family friends.

Garage conversion Campbell are one of the cheapest and most popular ADU units. For a suitable Garage ADU, a qualified and skilled contractor should be contacted. These types are preferred due to the cost-friendliness, and quick construction time – usually taking only 3-4 months.

What is an ADU unit?

An Accessory Dwelling Unit or ADU is a smaller stand-alone home connected to a main housing property. Accessory Dwelling units in Campbell, CA  are built for different purposes depending on the homeowner’s needs.

They can be used to generate income through renting them out or can also be used to house family members such as in-laws or  grandparents. This is one of the reasons why Campbell ADU units are referred to as the Mother-in-law units or Granny flat.

Some other property owners use them as backyard offices for work and studios for their hobbies. Choosing an experienced ADU builder, such as Wise Builders, is the most important decision throughout the process.

What does ADU stand for in housing?

In housing, ADU stands for Accessory Dwelling Unit. These are smaller homes that have usually been converted from a Garage, Cottage, Attic, or Basement into exterior living quarters. ADU’s can transform the aesthetic of your home, but the main benefit of an ADU Campbell unit is the potential additional income they generate.

Wise builders doesn’t only provide ADU construction services but also have top Housing Additions Contractors in Campbell, CA .

How do you know if you can build an ADU on your property in Campbell, CA?

Building a Campbell ADU is quite a straightforward process as long as you have all your required building permits.

Another factor to consider is your property location. If your home is located in specific Residential or the Mixed coast zones, you may be free to build without permits. On the other hand, if your housing is located in the Coastal zone, additional permits may be required. To be on the safe side, registered ADU contractors in Campbell, CA should be consulted. 

Benefits of Adding an Accessory Dwelling Unit to Your Property in Campbell, CA

In terms of benefits, ADU units give your property more flexibility and generate additional income every month when rented out. It also significantly increases the overall value of your home. Also, with the proper garage conversion contractor, constructing these dwelling units can be affordable and efficient.

Wise builders prioritizes budget and timelines, which is one of the reasons Wise is one of the leading Bathroom Remodeling Contractors in Campbell.

Does ADU increase home value?

An ADU unit as an Investment is well worth it, especially when built with higher-quality materials. It will add significant value to the property. In most cases, it can increase your home by as much as 30%.

If your property contains a City of Campbell ADU, then you can list it on  the California real estate market at a premium. Another remodeling project that significantly increases the value of the home is kitchen remodeling. It is no surprise that wise remodeling services is upon the top kitchen remodel company in Campbell, California. 

Rent out your ADU home in Campbell, CA

When rented out to tenants ADU Housing can be used as income-generating property providing consistent cash flow. Constructing ADU Campbell homes is a great way to monetize from your dwelling unit. Renting out your ADU home can provide passive income and help you pay the mortgage on your home. 

What types of ADU Housing Can You Build In Campbell, CA?

There are 3 main types of ADUs you can construct. Before searching online for an ADU builder near me, you must decide on an ADU type to fit your specific needs. You should have a clear vision regarding your home remodeling, area, and design to get the best out of your contractors remodeling services. 

ADU contractors in Campbell, CA should be consulted for professional advice

ADU units majorly fall into three major types.

  • Interior
  • Attached
  • Detached

You are allowed to build an ADU unit regardless of your Home Plot size. However, your local ADU contractor should inform you that if your ADU exceeds the available plot size, the maximum size of your ADU should not be more than 800 square feet with a maximum height of 16 feet. 

Detached Accessory Dwelling Unit

Detached dwelling units are stand-alone units that are completely detached from the main residence. This is preferred by tenants because it provides complete privacy, although the units are typically located only a few feet away from the house.

ADU Attached to House

These are smaller independent housing properties shared with the main housing property by a wall. Your ADU builder can construct these attached units when there is significant space for a stand alone unit or if there is already some external structure attached to the house like a garage.

ADU Garage Conversion

Garage conversion Campbell types is the most popular form of an ADU unit, mainly because it is less expensive. It often falls under the attached type of ADU unit, because garages are usually attached to the house.

The Garage Conversion ADU unit is extremely attractive to potential buyers, due to the extra space it provides. For a garage conversion that meets your specific needs contact a respectable ADU Contractor in San Jose, CA

How to Choose The Right ADU Builder in Your Area

If you’re looking to expand your property as well as improve its market resale value, it’s time to start researching for the best Campbell ADU contractors.

When interviewing ADU contractors, professionals who are familiar with the local zoning rules and requirements should be preferred candidates for the job. You also want to ensure that your contractor is licensed and insured. Demand to see your Cambell ADU builders credentials and also ask for past sample projects to confirm that your contractor has experience for the specific ADU unit you want to build.

How much to build ADU in California?

The cost of an ADU unit in California on average can range from $100,000 to more than $500,000. This will depend on the type of ADU, materials, design and size. and how it is furnished. You should consult with your local ADU builder in Campbell regarding prices and budgeting.

If you’re looking for a budget-friendly builder for an ADU Conversion then Wise Builder is the perfect fit for you. Wise prioritizes creating budgets and timelines from the get-go. This is because every wise remodeling project establishes these aspects before the project begins. 

How to finance an ADU in Campbell, CA?

The financing costs to build an ADU home can be quite high, so it’s important to be aware of the different financing options available to you. You can take out a personal loan from a private lender. These often contain no collateral and have higher interest rates. You can also explore a home equity loan, which allows you to take out another mortgage on your home depending on the amount of equity you have. This loan type has the home as the collateral and often better rates, proving to be a wise construction financing option. 

It is important to be aware of the different remodeling financing you can obtain, especially when you undergo complete Remodeling Homes Services in Campbell, California

Process to Building an ADU in Campbell, CA

The steps to building an ADU unit in Campbell are quite easy for any experienced Contractor. The first step for an ADU builder in Campbell is to determine the type of dwelling unit that best fits your Clients property, budget, and personal needs.

You also should have a set budget and project timeline before consulting an ADU Builder in Campbell, CA. Being firm with your budget is important, that way your contractor suggests only materials that fit your budget. 

Do you need planning permission for an Accessory Dwelling Unit in Campbell, CA?

Planning permissions for an ADU in Cambell are entirely dependent on your Location.

A home remodeler should be consulted on the ADU requirements for your specific location. It is likely that you will need both a building permit and an electrical permit. You will also have to pass the necessary inspections during and after construction. 

Campbell ADU requirements

The requirements of your City of Campbell ADU are just as important as the type of ADU you’re deciding to build. The required height for an ADU is 16 feet tall. The bedroom has to be at least 70 square feet. The kitchen and bathroom must be 50 and 30 square feet respectively.

And finally, the maximum height must be within the height of the existing structure.
For more information, the guidelines for  ADU Unit Building Services in the Bay Area should be referenced.

How long to build an adu?

This time frame largely depends on the scale of the ADU project and the experience of the ADU builders. Large-scale ADU projects usually take anywhere from 8-12 months. While smaller-scale housing units last nothing more than a few months. 

Though not advised, a home builder attempting DIY (Do it yourself) projects may take longer than a year. 

What you should know about the city of Campbell, CA?

Campbell is a small city in Santa Clara County, CA. It is located in the San Francisco Bay area and was discovered by Benjamin Campbell, hence the name. It serves as a home to Pruneyard Shopping Center, which is one the largest Shopping centers in the County.

How is the housing market in Campbell, CA?

The real estate market in Campbell is up 12.8 percent compared to last year. Homes in Campbell are sold for an average of $1.6 million within 27 days when placed on the housing market. Considering the hot market, it is a good time to hire contractors for custom home building services in Campbell

An ADU is a great way to generate passive income and host family members. Trusting an experienced general contractor is a smart decision to make. Hiring professionals can make or break your ADU construction experience, as you want your contractor to be experienced and trustworthy. 

Frequently Asked Questions about ADU construction in Campbell, California

What does ADU mean in real estate?

Accessory dwelling units (ADUs) are also commonly referred to as Standalone apartments. These secondary ADU housing units are additional living quarters used as a source of passive income or to host family members. 

What states allow ADU?

The majority of States across the US permit ADU construction. However, there are local laws guiding the construction of ADU depending on the state. The majority of the counties in California including Campbell support the construction of ADU units for housing opportunities.

What is a junior ADU?

A Junior ADU, also referred as a JADU, is created out of the extra existing space within the primary property by adding a small kitchen and exterior door leading to the property. Junior ADUs normally share a bathroom with the primary dwelling. 

Does a garage conversion add value to a house?

If properly constructed, a garage conversion can add value to your home by as much as 20%. This will, of course, depend on the exact location, type of property, and the current market conditions. 

Does adding an ADU increase property taxes?

Yes, adding an ADU unit increases the property tax because it increases the value of your home. The property tax rates on ADUs are averagely within the range of 1-1.5% of the construction cost. However, just because the property taxes increase doesn’t mean the entire home will be reassessed. The ADU is independently assessed which results in a blended assessment.

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