#1 General Contractor in Northern California

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Awards Logos Best ADU Builder 2023 in California Best ADU Builder 2023 in California
Awards Logos №1 Constraction Company in Sacramento #1 Construction Company in Sacramento
Awards Logos #25 in California’s Top list of the fastest private growing companies #25 in California’s Top list of the fastest private growing companies
Best ADU Builder 2023 in California
Awards Logos Best ADU Builder 2023 in California Awards Logos №1 Constraction Company in Sacramento Awards Logos #25 in California’s Top list of the fastest private growing companies
Awards Logos #25 in California’s Top list of the fastest private growing companies
#1 General Contractor in California

Receive $500 OFF

When You Request Online
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Trowbridge ADU Design & Build

We take care of everything from plans and permits to construction and comprehensive project management, simplifying ADU development and ensuring your peace of mind


A fully-custom design to give you a truly unique space that matches your style, budget, and vision for new space.


Offering multiple architectural plans for detached ADUs that have already gone through the building permit review


Our selection of expert-designed, ready-to-build ADU plans. Talk to our expert to find the perfect plan.

Garage Conversion

Redefining your space with innovative design, rapid execution and superior craftsmanship.

Cost Calculator

Turnkey Custom ADU

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The calculations are approximate, based on A+ Construction Big Data Research 2023 Ⓒ
The calculations are approximate, based on A+ Construction Big Data Research 2023 Ⓒ

Our Latest ADU Projects

Our Process

A stress-free experience from start to finish

1. Consultation

Schedule a Virtual or an In-House Consultation with our Remodeling Consultants to discuss your project.

2. Estimate

Come in for an appointment to our Designer Showroom to go over the quote аnd pick out materials.

3. Contract

We sign a contract and get the ball rolling. You will meet with our Designer to finalize the designs.

4. Construction

We incorporate digital technologies into our construction processes to be more efficient.

Book Your Free Consultation Now

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Why Choose
A+ Construction & Remodeling?


We provide clear estimates that tell you exactly where your money is going.

Timeframe & Schedule

We provide an easy-to-follow schedule so you can see where your project is at and what is next, in real time.

License & Warranty

We are licensed, bonded and provide warranty on labor and materials because we believe it’s important for you to have a peace of mind.


We have a streamlined communication system that includes your own personal chat with your entire team ready to answer your questions at any time.

A+ Construction & Remodeling ADU Builders Proud to be recognized by

BBB A+ Rating
NKBA - The National Kitchen & Bath Association
NARI - National Association of the Remodeling Industry
Yellow Pages
EPA - United States Environmental Protection Agency
DR - Daily Republic News
The Sacramento Bee News
GoodDay Sacramento - CBS News
YEC - Young Entrepreneur Council
Renovate America
The Original Sacramento Home & Garden Show
Chamber of Commerce
GC Magazine
GuildQuality Member
Made In USA
ADU Calculator

What type of ADU Construction are you looking for?

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ADUs can be considered a revolution in the world of housing. The versatility of these units that are built on your lot with an already existing house is enormous. While building it doesn’t require enormous amounts of resources, this property can become a great way to start a business or simply increase the living space for your family members. Moreover, if circumstances change in the future, you even have the option to put your ADU for sale and benefit from the growing demand for these versatile living spaces.

ADU Builders Trowbridge, CA

Even though it may seem that building a small unit on a lot will not take much time and effort, in reality, it is a complex process that requires many steps. Hence, homeowners in Trowbridge, California, address professional general contractors who build such units for them.

A+ Construction & Remodeling company with years of experience in the field has earned the title of the best contractor nearby and is ready to offer you services of the highest quality. Apply to our managers via the site or visit us in person and order the ADU design that will fit your wildest dreams.

ADU Contractor Trowbridge, CA

None of us wants to flush the money down the drain. Consequently, it is of utmost importance to find a reliable general contractor. In our view, this is not hard when you know certain requirements.

Follow these pieces of advice to find the contractor in Trowbridge:

  1. Look through the pages on their site to check the finished projects. This will give you a better idea of the designs they provide and whether such units suit you.
  2. Deciding on your budget may help you find the right contractor. Check the pricing lists to see if the contractors ask for a comfortable price or not.
  3. Additionally, checking the reviews on the Internet is really helpful in this task. You can find these reviews on special home-building forums or on the pages of review aggregators.

Continue reading this article, and you will learn the benefits of such units, the requirements of reliable general contractors, ADU types, and much more. However, if you already know everything about ADU building, call A+ and order a project for your future dwelling unit.

ADU Contractor Building Types

The companies have come up with various ADU types that can be built on your property in Trowbridge. On your request, we will build one of the following ADUs:

  • Attached ADU

Lacking living space and want to enlarge your main house? Then this ADU type is definitely for you. We will build it in close proximity to the already existing property, so one wall will be mutual, which allows free access to the new construction. Being a bit cheaper than a Detached ADU, this variant will suit large families or seniors who require fast access to other family members.

  • Detached ADU

This construction will be placed on your lot at some distance from the main house. However, it will possess the very same advantages as any other ADU type, like amenities and a separate entrance. The design and the process of construction may be quite expensive, though.

  • Junior ADU

This unit is not any different from the others, but its maximum size of it cannot exceed 500 square feet. This construction can add a nice touch to your yard if the designs of it and your main house match. Even though one cannot compare it to a multifamily dwelling, it can still be a great housing option for a young family.

  • Conversion

If you have any unnecessary rooms in your house or building on your lot, you can transform them into a modern living space. This will allow you to rent this space to the tenants, which, in its turn, will increase the family budget and help the community as well.

ADU Unit Construction Trowbridge

The state law imposes certain requirements concerning ADU construction that every person must follow. Before you order the ADU design from a contractor, it is advisable that you check their certificates that allow them to work in the sphere.

The professional team of lawyers working for A+ can help you handle the issues concerning zones where one can build an ADU, as well as the requirements for it. At our request, the people in charge will have to provide this information to us. So, before we start constructing the ADU, you will get a free estimation of where and how we can build an ADU on your property.


Benefits of ADU Building

As we have already said, building an ADU has numerous advantages. The customers for whom we have already created the ADUs use them for different purposes. While some have set up a new housing business, others have created a comfortable area for their hobbies.

The ADUs we build have the following advantages:

  1. The creation of an ADU is incomparable to building a whole new house in terms of time and resources used. It depends on many factors, but you can get an idea of how long the whole process will last after we do a free estimation at our office.
  2. The housing market doesn’t cease to grow as more and more people seek affordable housing. An ADU can help you start a new renting business that will grant your family extra money monthly.
  3. We know how anxious it may be to be the host for unexpected guests coming from all over California without warning. An ADU can provide them with comfortable accommodation overnight.

Trowbridge ADU Construction Company

A+ Construction & Remodeling can boast the title of one of the best general contractors in California for a reason. Actually, there is a whole list of reasons why one can ensure us building an ADU.

The benefits of working with A+ are the following:

  • The portfolio of completed projects that we amassed during the years of working on ADU serves as proof of our reliability. Here you can see how well we work on design, how expensive our ADUs are, and how fast we build.
  • During the construction, you will be able to control the whole process. We believe that the best customer is the one who is worried about the view of the future unit. If you notice anything suspicious in the building area, tell our managers, and we will try fixing it together.
  • At our office, our skillful managers provide the clients with a free estimation. You will be able to see the needed resources and the view of your future home, add your commentaries concerning the design, and much more.

ADU Building Trowbridge

Apart from giving you an opportunity to start a business and create a truly multifamily housing option, an ADU can offer the owners a huge spectrum of other uses. For example, it can serve as a temporary or permanent living space for your seniors, for whom it’s better to live in the same city as you. This gives you an opportunity to provide them with proper care.

Moreover, an ADU can be turned into a home office. If you are tired of waking up every morning just to spend an hour navigating through traffic jams, this option is for you. Turn the page of suffocating offices and work from the comfort of your home with A+!

Looking for More ADU Options?

Tiny Homes

TinY Homes

Experience tiny living with our innovative designs and unmatched quality

Prefab ADU

Prefab ADU

Streamlined elegance: Discover our cost-effective prefab ADU solutions

ADU Design Build

ADU Design Build

From concept to completion: Superior design, rapid construction, and cost-effective solutions

Backyard Cottage

Backyard Cottage

Seamless blend of rapid construction and superior design in your outdoor space.

Detached ADU

Detached ADU

Seamless integration of space and style with expertly crafted detached ADUs

Tiny House With Garage

Tiny House With Garage

Innovative solutions for compact living with convenient garage space

In-law Suite

In-law Suite

Superior in-law suites built with excellence and craftsmanship.

Garage Conversion

Garage Conversion

Redefining your space with innovative design, rapid execution and superior craftsmanship.

Custom Tiny Homes

Custom Tiny Homes

Your vision, our expertise: Creating custom tiny homes with superior quality

Tiny Office

Tiny Office

Elevate your productivity in custom tiny offices built with excellence and craftsmanship

ADU Estimator

ADU Estimator

Get an average price for an ADU in your area or talk to our expert to get a detailed quote.

Granny Flat For Every Family Change

Granny Flat For Every Family Change

Redefining independent living with top-notch design and innovative solutions.

A+ Construction & Remodeling Certifications

INC. 5000 Ranking

INC. 5000 Ranking

EPA Certification

EPA Certification

LIC #1007869 CSLB

LIC #1007869 CSLB

Accreditation with BBB

Accreditation with BBB

Member of NKBA

Member of NKBA

Member of NARI

Member of NARI

What Makes A+ Construction & Remodeling Unique


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.


Prefab ADU Construction

If you are still unsure about building an ADU, despite all of the above-mentioned benefits, perhaps a Prefab ADU is your pick. You can request to build this unit in your backyard and get access to the same benefits of any regular ADU, but for a smaller price. Access to city services and a separate entrance are included!

However, you will not be able to apply any changes concerning the design, as you will pick only from the ADUs we have built in the past. In our turn, the company spends fewer resources on creating the plans, which allows us to lower the final cost. You can check the approximate cost on the special page on our site.

ADU Housing

This versatile housing option allows the owners to use it in many different ways. No matter which option you choose, such units can easily boost your quality of life, be it additional income or extra living space. People in power have announced the increase of housing options as their agenda, so by building an ADU, you can significantly help the community by giving people access to comfortable housing.

At this point, you should know almost everything about ADUs. However, if you still have questions, you can visit our site or come to our office and ask them. We hope this article was useful for you. Hopefully, your ADU will be added to our portfolio and different sub-pages soon!

ADU Building Process Steps

Our comprehensive ADU construction process includes permit ready set of plans, interior design, submittal services, removal of debris. We are committed to using only the highest quality materials, ensuring the longevity and value of your ADU. With our ADU Building Services: From initial design consultations to the final touches, we’re with you every step of the way.

ADU Construction Process Steps

Step 1. Permit ready set of plans: Architectural plans and engineering calculations, ready for a permit application.
Step 2. Interior Design: Our expert team offers personalized design consultation to create a functional and stylish interior space.
Step 3. Permit Submittal Services: We handle the hassle of permit submissions on your behalf, ensuring compliance with local regulations.
Step 4. Removal of debris: Our efficient crew takes care of removing construction debris, maintaining a clean and safe work environment.

ADU Construction Includes

Please note that the contents of the package may vary depending on the specific terms outlined in the contract. While we strive to provide accurate and consistent packages, certain variations may occur based on the agreed-upon terms and conditions.
  • Concrete slab foundation: Enjoy a durable concrete slab foundation with proper grading and excavation for structural integrity.
  • Exterior covered porch: Create an inviting outdoor space for relaxation and entertainment.
  • Walls, partial vaulted/flat ceilings, 9′: Experience open and spacious living areas with customizable ceiling styles.
  • Gable style roof: Benefit from a classic and durable roof design that adds timeless appeal to your home.
  • Shingle type roof: Our high-quality shingles, along with gutters and downspouts, provide excellent protection and drainage.
  • Mini-split Dual zone: Achieve optimal comfort and energy efficiency with our dual-zone mini-split system.
  • Tank water heater: Enjoy a reliable water heater, conveniently housed in an outdoor galvanized water heater closet.
  • Electrical sub-panel: Ensure efficient power distribution with our electrical sub-panel, meeting all safety and code requirements.
  • Switches and outlets per code: We install switches and outlets throughout your home, adhering to electrical code standards.
  • Exterior entry doors 36×80: Enhance security and aesthetics with our high-quality exterior entry doors.
  • Standard-sized swing doors: Seamless transitions between rooms with stylish and functional doors.
  • Standard-sized interior closet doors: Maximize storage space with our efficient and visually appealing closet doors.
  • White vinyl windows: Enjoy energy-efficient windows that allow natural light to brighten your home while providing insulation.
  • Insulation per T24: Our construction includes energy-efficient insulation for optimal comfort and reduced energy loss.
  • Drywall & Orange peel or knockdown texture: Smooth and visually appealing finish with texture options.
  • Interior paint: Choose from a wide range of premium paint colors to personalize your interior space.
  • Painted exterior lap siding: Enhance curb appeal with professionally painted lap siding that withstands the elements.
  • Luxury vinyl planks: Experience the durability and low-maintenance benefits of luxury vinyl planks for your flooring.
  • Shaker style/European style cabinets: Enjoy the elegance and functionality of our shaker style or European style cabinets.
  • Tile backsplash, 18″: Add a stylish and practical element to your kitchen or bathroom with an 18″ tile backsplash.
  • Natural stone countertops: Elevate your kitchen and bathroom spaces with luxurious and durable natural stone countertops.
  • Closet and pantry shelving: Maximize storage efficiency with our customizable shelving solutions for closets and pantries.
  • Pre-assembled vanity cabinet: Our pre-assembled vanity cabinet comes complete with a countertop and splash piece backsplash.
  • Acrylic shower enclosure: Experience the beauty and low-maintenance benefits of an acrylic shower enclosure.
  • Plumbing fixtures and light fixtures: Our package includes high-quality plumbing fixtures and light fixtures as per the plan.

  • Frequently Asked Questions

    How long does it take to complete an ADU?

    The building time depends on various factors like materials, design, area, and many others. However, normally for our company, it takes around 7 to 10 months to complete an ADU. So if you order one in March or April, you can expect it to be finished by October.

    When is the best time to start the construction of an ADU?

    Normally, we recommend our customers set the start of the construction for spring, for example, March or April. This allows us to work on the foundation while it’s pretty warm outside. Hence, we will not need to make our way through the frosty ground. However, as it is warm in California throughout the year, we can start building an ADU in any month, be it April, July, or October.

    How can I apply for the construction of an ADU?

    When it comes to ordering an ADU, there are two main options for how it can be done. You can either come to our office in the nearest city or use our site. The latter option is really convenient as instead of spending time on the road; you can use the arrow and click on the needed sub-pages to access the application form.

    Other Renovation Services in Trowbridge

    Serviced ZIP codes: 95659, 95674

    Thousands of Customers Can't be Wrong!

    Robert & Clara H.
    A+ Construction & Remodeling really nailed it with our detached ADU! Their team's always-on attitude was a lifesaver, and the pros at A+ not only answered all our questions, but made the whole process a breeze. From plans to final inspection - 100% great work. Plus, having a chat where we could go over pictures and get quick answers.
    Peter D.
    A+ Construction & Remodeling helped me turn my property into a profitable investment with their ADU designed for Airbnb. The well-planned design and top-notch construction attract guests, and the extra income has been a game-changer. I highly recommend their services to anyone looking to add value to their property through short-term rentals.
    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.
    Bill W.
    A+ Construction & Remodeling did an excellent job building an ADU for my parents. The construction team was efficient and attentive, ensuring that the project was completed on time. A+ is an ideal choice for anyone looking to build an ADU for their family. I highly recommend them.
    Nancy B.
    Our 2-story ADU by A+ Construction & Remodeling is great! These team is total professionals, always ready to help. They not only had all the answers to our questions but also guided us through the details of plans and permits.
    Michael & Karen M.
    A+ team build an ADU that we turned into a home office. Their construction approach maximizes functionality and creates a productive and inspiring workspace. We highly recommend A+ as the top choice for those looking to build an ADU.