Vallejo Solano ADU Builders


Serviced ZIP codes: 94592, 94591, 94589, 94590

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One day you may understand that your existing living space is not enough and you need to enlarge it somehow. If so, there is one proven and convenient way to do that: you can build an accessory dwelling unit, shortly called an ADU.

If you reside in Vallejo or any other area of Solano county, you might have seen such buildings around. They are typically smaller than primary housing and can be attached to houses or stand separately. Homeowners build them for different reasons and often prefer their creation to sell their existing property and buy new homes.

We have prepared this guide for you so that you receive all the necessary information about building a Vallejo ADU, finding a professional company that will become your builder for the project and the benefits that accessory dwelling units bring into your life.

Possible Types of ADUs Next to Your Primary House

In California, there are four types of ADUs allowed and common. When you start thinking of an accessory building next to your primary home, the first thing you should do is define the type that suits your needs and preferences.

You can select from the following types for your unit in Vallejo:


Detached ADUs are those built separately from primary housing. If you have a single-family home with no spare rooms but need some extra living space (for instance, for your parents), a detached unit is a fantastic option for you. People often call them “granny flats” because they build and use them for their parents and other senior relatives.


On the contrary, an attached ADU shares a wall with your existing home. It works perfectly if your family is expecting a child and you want to create a separate room for them right away.


This type’s name gives us a hint — when we say converted ADU, we mean that it used to have other functions and looks before but has existed as a structure for quite a while. Normally, a garage becomes a converted accessory unit because it is so easy to remodel it.


These units have certain size requirements: no more than 500 square feet. If a unit is bigger, it cannot be considered a junior one.

Generally, ADU is a rather affordable housing that can help you in numerous situations. To make your unit solid and reliable, you’d better find a professional builder that will be responsible for the whole project. Check our recommendations below.

Vallejo, Solano Accessory Dwelling Unit Builders for Hire

A qualified builder is essential when we talk about creating a Vallejo ADU in your property line. Hiring a team of specialists who know what they are doing is much better than trying to figure out your ADU project step by step and complete each stage on your own.

The property owner gets plenty of benefits when they sign a contract with a construction company for an accessory unit creation. The company takes full responsibility and builds the structure from scratch — and the property owner does not have to worry about it.

Here are some vital points you have to check before you sign a contract to build a unit in Vallejo city, Solano county:

Recommendations from people you know

Construction and remodeling works are quite common because people often wish to change something in their existing housing or build something new. Probably, during the last couple of years, someone you know has done some renovations. Try asking them for advice regarding a company they have worked with and its building division expertise.

Online reviews

Another way to find a trustworthy company in your city is to check various comments online. Pay attention to the negative ones: it will help you avoid the tragedy of hiring inexperienced or dishonest businesses.

Gallery of completed works

Remember to check a company’s portfolio to ensure that the team has enough expertise to provide you with top-notch service. Also, it might happen that your vision and style do not coincide with the company’s views and opinion on design, and you will understand that from looking at their gallery.


Businesses that work in engineering and construction fields in California must have certain permits and a license so that they operate lawfully. Do not forget to ask about it before signing a contract. Without permits, it will be impossible to complete your structure creation.

All these factors affect the success of your project and its completion, so do not neglect to check the above-mentioned information about each company you consider for your remodeling and construction projects in California.


ADU Contractor in Vallejo, Solano

Among a wide range of contractors that operate in California and Vallejo city, one has proven its skills for many decades now. The A+ Construction & Remodeling company has worked with dozens of clients in the area and has helped them implement their most unbelievable construction and renovation dreams.

The company has careful managers who are willing to listen to the customers attentively; your ADU building will be accompanied by a professional designer, a skilled architect, and a team of talented construction workers who will provide you with the best service.

The A+ company gives you an opportunity for affordable housing and lets you be free from all worries tied to accessory dwelling unit creation. Do not hesitate to ask for a consultation and meet with the company’s reps to discuss your property improvement.

ADU Unit Construction in Vallejo, Solano

Because an ADU is normally a residential property, there are certain regulations that residents should obey when they start their projects in California (and Vallejo city, particularly).

For instance, in most cases, the maximum height of an ADU in the state should be 16 feet (there are exceptions — you can check them with local authorities). A residential ADU must have a minimum lot size of 150 square feet; however, it cannot be over 1000 square feet.

There are more rules regarding setbacks, parking, and other aspects; we will not define them in this review, but you must keep in mind that they exist and familiarize yourself with them.

Another essential thing is that you have to get a permit for your ADU regardless of the town in California you reside in. Although it might seem a hard task, if you hire a company that will build your unit, it will assist you with getting a permit. Also, it will construct your unit in accordance with fire safety rules and other regulations.

If you hire a team of professionals to complete your project, you will surely get a unit that will be built properly and there will not be any problems in the future.

Benefits of ADU Building

Building an accessory unit is extremely beneficial, and here is why:

You enlarge your living space

This factor always gives you more opportunities for yourself, your family, and your friends. Many families build ADUs in Vallejo city because they feel a lack of space. A well-made unit solves the problem perfectly.

Your custom unit can be used as a home office where no one disturbs you or a room where you spend time blissfully with your favorite hobby (like painting or sewing, which often requires additional space); you can also host a long-term party, and your unit will become a guest house.

Lastly, a unit is perfect for your parents or grandparents to move in and reunite with your family. If you have a single-family home without many rooms, having a spare property for seniors makes a lot of sense. Their proximity to you will ensure that you will be able to care about them anytime.

You can organize long or short-term rentals with bigger fees

Renting out is becoming more and more popular among those who can afford more real property. If you are tired of your existing home or wish to move out and change your address due to other reasons, you can rent it and make the rent price higher with a good-quality custom unit.

Your residential space becomes attractive for sale

A residential property sale is another level where you get benefits. It is a serious event, and owners normally want to make the deal extremely profitable — an ADU will help you with that.

In all cases, the A+ Construction & Remodeling company will provide you with the best service and construct a delectable accessory unit for you.

Benefits of ADU Building

Benefits of ADU Building

  • Additional Income: having an ADU on your property that you can rent out for additional income is a project that will pay for itself. Some homeowners are adding an ADU to alleviate their mortgage payment in the long run.
  • Guest House: an ADU will give you an option to host guests without disturbing your lifestyle. Having guests stay on the property but not necessarily in your home, makes it easier for the homeowner.
  • Living Quarters for Parents: if you have aging parents that you want to take care of in the comfort of your own space, having an ADU will make it possible for them to live close to you and yet let you have your own home for comfort.

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Vallejo, Solano ADU Construction Company

So, what does A+ suggest? With the company’s team, where all the qualified specialists have gathered, you are all set.

The company’s background is rather impressive, with over a dozen years of experience and plenty of completed projects of any complexity. The company uses the best quality materials and the newest technologies; it will also help you get your project approved by the local government and get the required permit.

With A+, you can not only build a unit from scratch but also give your single-family home a massive remodel. The company’s specialists are ready to suggest you various options that will fit your budget.

Besides Vallejo, A+ operates in other Californian cities, so if you plan to buy or build some real property in other regions, you can save the contact for the future.

Building ADU in Vallejo, Solano

So, when you have your first consultation with a company that will build your project, and both parties sign the contract, your construction will officially start.

The plan is the following:

  1. On-site meeting

In the beginning, experts from the team arrive on-site to see what they will work with. Depending on the soil and surroundings, they decide what materials to use and how to build your unit and make it solid.

  1. Design planning

Designers, together with architects, will develop your unit’s plan.

  1. Building

After the plan is approved, a team will construct your unit in accordance with the designer’s offerings.

  1. Final check

When the work is done, you will be able to inspect the results.

Hiring professionals means that your unit will be built easily and in the shortest terms. Trust your property to the A+ experts, and you will not regret it!

Prefab ADU Construction

Recently, prefab ADUs have become popular among Vallejo city residents. The point is that you can order a ready unit instead of building a detached ADU from scratch. Normally, it is much cheaper than creating something new.

So, if you feel like your budget is limited, consider ordering this option. Consult with A+ managers to see if you can get your prefab unit right away.

ADU Housing

Building an ADU can significantly improve your life, and finding a good contractor to build a unit is essential. The A+ team has dozens of ADUs built behind its back and operates not only in Vallejo and Solano but also in other Californian cities and counties like Napa Valley, Santa Rosa, San Rafael, and so on.

The company’s managers will be happy to help you with your ADU. We wish you a pleasant journey in the construction world!

Frequently Asked Questions — FAQ

Why should I build an ADU in Vallejo city?

Getting an ADU will help you enlarge and improve your living space; it can solve many problems that modern families have. For example, you can use a unit as a place where you will work instead of going to the office if your boss allows you to work remotely. Also, you can ask your parents or grandparents to move in with you if you worry about them. These are just examples; there are many other benefits of ADUs for homeowners.

How long does it take to finish an ADU project in Vallejo?

The term depends on the unit you build. If it is something massive, you should plan at least a year to complete it. Moderate units will take about six or eight months. If you opt for a prefab unit, the term will be smaller.

How much does an ADU in Vallejo city cost?

On average, you should be prepared to pay 200,000-300,000 US dollars. There is no uniform number that answers this question: each unit has unique features, size, and, therefore, cost. When you turn to your local contractor, normally, its managers are capable of counting the approximate price for you; remember that it will probably grow because some details might not be considered from the start.

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    What Makes Us Different


    Our process is organized, streamlined and designed with you in mind.


    We hold many awards and certifications in the industry.


    In-house team means vendor savings passed on to you.


    Professionally designed showroom with you in mind.


    We provide detailed estimates showing you what you get for your money.


    Furniture-grade quality products at affordable prices.


    Our showroom carries the latest materials from trusted brands.


    Our materials are eco-friendly and green certified.


    We want you to be confident in your decision, no pressure sales.

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    Serviced ZIP codes: 94592, 94591, 94589, 94590

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    We recently completed a renovation of our Bathroom Vanities and Master Bath Shower and Floor. The result was a beautiful transformation and we are immensely pleased with the job that A+ Construction & Remodeling did, from start to finish. The crew and staff are real professionals and true craftsmen. I would not hesitate to call upon them in the future for any work that I may need done, and would certainly recommend them to others. A Job Well Done!
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    Hilary English
    Before moving to our new home in California, we decided to give the kitchen a more personalized feel. We contacted A+ Construction and Redemoling as a recommendation from a friend. Their designers took us through a number of designs. Today, all friends admire our kitchen. They truly didn't disappoint.
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    Richard Easter
    A+ Construction and Remodeling guys are the best! They helped us make many home repairs to prepare for listing our old home and are helping us right now with the set up in new house. The production team was fast and professional, and I love my new remodeled kitchen. Wouldn't hire anyone else!
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    Robert Ackerman
    They did an amazing job on our bathroom! Workers were friendly, clean and on time. They always kept in touch with us regarding anything that came up and even gave us updates on the work. Very responsive to my texts/calls if I had any questions. Will definitely use them again for any of our other remodel projects.
    Testimonial Jerry & Sheron S
    Jerry & Sheron S.
    We hired A+ Construction & Remodeling to convert our garage to an ADU. Both our project manager and the construction team were pleasant to work with. They were always on time and managed to finish the project even before the deadline they set for it. We are extremely pleased with the outcome. We would recommend A+ to anyone considering a home remodel or new construction.