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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
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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

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When You Request Online
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Alta 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.

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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

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Each homeowner tries in various ways to improve the living space by all available methods, including hiring an ADU builder Sacramento. Some solutions can add beauty to the house, others functionality; however, there is one way that allows you to achieve all your goals at once, namely the construction of an accessory dwelling unit.

ADU Builders Alta, CA

If you decide to build an ADU, then you will need the professional services of a general contractor, and here are two main reasons why. Firstly, the contractor team consists of highly professional specialists (designer,
architect, builder, electrician, etc.), each of whom perfectly knows the nuances of the job. This will help to avoid mistakes that may complicate the life of the homeowner in the future.

Secondly, the company’s employees know important insights, for example, permitted construction standards in a certain city in California, where it is more profitable to purchase materials and much more. This significantly
saves the strength, nerves, and money of the homeowner.

ADU Contractor Alta, CA

Finding the perfect general contractor who can complete the ADU construction at a high level is not an easy task, especially if it happens for the first time in your life. However, there is a set of parameters, and knowing
which it is much easier to pick a company that will build an accessory dwelling unit for you.

We identify three basic factors that will help you with the choice:

  1. Relevant experience. A large number of completed construction projects is the strength of any contractor. However, among this number, there should be works corresponding to your expectations about the future ADU. That is, if
    you are planning to implement an attached ADU project, then the construction team should have such experience in the portfolio.
  2. Availability of an official permit. The activities of each contractor must be authorized and permitted by all local laws. Such permission is provided in the format of a construction license, so be sure to check its
    availability and expiration date.
  3. Reputation among the population. For any ADU contractor, there is no greater praise than a high rating from the community of homeowners. You can do a little research in your neighborhoods and ask people about the quality of
    the service that the company provides.

All in all, typically, these three points are enough to weed out most contractors and abandon their services. Some companies can only meet two positions out of three. However, there is a firm in Alta city that meets all three
requirements, and this is A+ Construction & Remodeling.

ADU is an autonomous residential space that can perform many functions, increase the value of your property and even permit you to earn money, thereby paying off construction costs faster. On par with this, it is an
aesthetically stylish and environmentally friendly building.

In this review, we will tell you what types of accessory dwelling units exist, what factors need to be taken into account if you are planning to build an ADU, and which general contractor in Placer County will cope with this
task best.

ADU Contractor Building Types

There are a huge number of ADU types that you can place on the same territory as the main property. Each accessory dwelling unit is distinguished by its unique layout, price, functionality, and a set of advantages.

  • Detached ADU

This is the small self-contained building that is located separately from the primary residence. The detached unit is equipped with all rooms for comfortable living, in particular, a bathroom, kitchen, and a spacious sleeping
place. If desired, you can transform a one-story ADU into a two-story one, add an attic, and also rent this space.

  • Attached ADU

The key feature of this project is that the new building has at least one or even several common walls with the main house. The same can be said about the foundation. These factors influence the fact that the construction
process of attached ADUs is relatively short. You can use this space as you want; for example, you can make a home office, create a home theater or add an extra bedroom if your children have grown up and they need separate

  • Garage Conversion

The condition of the existing garage among the majority of homeowners is quite depressing because this space is rarely used effectively. With the help of the garage conversion project, you can solve this topical problem. For
example, create a small workshop if you like a car, a place for children’s hobbies and games, or a space for relaxation and yoga classes. Finally, the converted garage can be equipped in the format of a place where a family
archive, garden tools, and various types of transport (scooter, bicycle, scooter, or monowheel) will be stored neatly and not in a mess.

  • Basement Conversion

One of the most difficult projects in terms of implementation. The timeline of work can reach several months because it is necessary to completely transform the space from floor to ceiling. However, the result will be fantastic
and will exceed all your expectations. A new room can become a cool place to relax; you can equip it for an elite wine cellar, a home gym, or a library.

Overall, each of these projects can increase the value of the property, bring a lot of practical privileges and make living conditions more comfortable. However, for this to happen, you need to find a highly qualified
contractor who can complete the job at 10 out of 10. This will be discussed further.

ADU Unit Construction Alta

Another important reason that will motivate you to interact with a general contractor is the legal aspect of ADU construction. The laws about the placement of ADU on a residential plot vary depending on the location of the
residence. For example, the construction requirements in Alta city may differ from other towns in Placer County.

Let’s look at the concrete example of garage conversion. If you are planning to implement such a project, then you need to know the minimum lot size, the maximum lot size, the required parking dimensions, ceiling height,
and the approval timeline. Please note that you also need to take into account the zoning laws of garage conversion.

In this regard, the team of every professional contractor should have a world-class lawyer, and in A+ Construction & Remodeling, such specialists exist. They know all the building codes of all cities in California and will
help you get the necessary building permits asap.

Benefits of ADU Building

The main advantage of ADU is the guaranteed return on investment that you spend on the construction process. However, the list of benefits that the homeowner will receive does not end there.

We identify five main positive factors from the implementation of the ADU remodel project:

  1. Additional income. Installation of ADU permits you to receive passive income without making an effort since you can rent out the premises. An additional advantage of this solution is that the ADU will be in operation and not
    stand and gather dust without application.
  2. Organization of large family events. Very often, we have the desire to join all family members together in one place, but there is no such opportunity. Fortunately, ADU easily solves this problem because you will have an
    additional kitchen, bathroom, and several beds for convenient accommodation for guests.
  3. Home theater. Perhaps this is the biggest dream of every homeowner because watching a movie on the big screen gives a lot of positive impressions, charges life energy, and unites the family. In the first stages of the
    implementation of the ADU project, you can ask architects to create a design for a home theater.
  4. Sports activities. Regular exercise is very good for health, but a working person does not have the opportunity to go to the gym every day, as it is very expensive and not practical. ADU construction will allow you to be
    engaged in physical activity every day because you can make a home gym out of the available space and install all the basic equipment.
  5. Child development. The new building on your site can be used to broaden the horizons and develop the skills of the child. For example, you can organize an art studio, a children’s room or install a Swedish wall on which
    kids can splash out energy and spend time with friends.

On the whole, you can start using these privileges immediately after the construction is completed. However, to remain fully satisfied with the finished project, it is necessary to hire a highly qualified developer, and in Alta
city, this is the A+ team.

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.

Alta ADU Construction Company

Typically, almost every ADU contractor removes the client from the construction process; however, this is the wrong decision because the homeowner has the right to keep direct contact with the developer throughout the entire
working period.

In this regard, A+ Construction & Remodeling is an exception:

  • Productive first consultation. Already at the first meeting, you will have the opportunity to discuss the main points of construction, in particular, the budget, work timeline, room design, and much more. You will also
    receive valuable tips, for example, how to save budget by purchasing cheaper, but no less high-quality, materials.
  • Making adjustments. If you are planning to make changes right during the workflow, then you can always perform it. To do this, it is enough to discuss an idea or proposal with the project manager.
  • Interaction with team members. At each stage of the building process, the homeowner needs to make important decisions, for example, pick the type of flooring or select the most suitable wood for the door. In order not to
    make a mistake, you can consult directly with each of the specialists, e.g., architects, designers, or electricians.

In total, only responsive staff work at A+; they try to make every effort to build the perfect ADU for you and comply with all your wishes. In this aspect, there is no better company in Alta city, so contact our managers to
discuss all the details.

ADU Building Alta

The advantage of ADU is that this building has several hidden features, the existence of which some homeowners do not suspect. Most of them are related to the way ADU is used. For example, one of the options for a garage
conversion is a man cave. This is a space in which you can install a billiard table, a console with games, a home bar, and table football, and choose the most brutal and masculine design.

Another unusual variant of ADU is a pool house. From the name, you can guess that a pool bowl is installed in front of the building, as well as a place for a grill and a basketball court. Finally, ADU can be used as a coworking
space if you work remotely. You can put a sofa, a coffee machine, and a board for brainstorming. This will allow you to immerse yourself in thoughts and distract from the hustle and shouts of children.

Prefab ADU Construction

The development of the construction industry has reached such a stage that now it is not necessary to contact an architect or designer for their services. You can order a finished building, and the manufacturer will deliver it
to your site in the format of panels or modules. All issues related to logistics are also taken over by the contractor.

Such projects are called prefab ADUs, and their main advantage is a short installation period and low costs. The most popular option is Junior ADU; these are single-family homes with a small area, and the construction of which
takes no more than two months.

As in the case with any other ADU types, do not forget to study building codes because there is a separate law for prefab houses.

ADU Housing

The decision to build an ADU can be fateful for you, incredibly profitable, and of high quality in terms of improving the level of living conditions. However, to get the perfect ADU, you need a responsive and professional
contractor. The name of such a company is A+ Construction & Remodeling, which provides the best building services in Placer, California.

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 much does a new ADU cost in Alta city?

    The cost of construction services depends, firstly, on the size of the ADU and, secondly, on the contractor because each company sets its price tag. We can say that the cheapest option is junior ADU because of the small area,
    and a detached unit will require the most investment because it is a separate building.

    What is the timeline for the ADU project implementation?

    It is also impossible to give an accurate answer here. For example, prefab ADUs are the fastest option because, in the shortest possible time, the contractor will deliver the modules to your site and assemble the structure in
    less than two months. The longest option is large-scale projects, for example, two-story ADU, as you can start discussing the layout and design in January and finish by the end of summer.

    What are the advantages of ADU in Placer, California?

    If you decide to build an additional dwelling unit, then this will at least permit you to increase the value of your property, receive passive income and improve living conditions. Also, since ADUs are energy efficient, your
    utility costs will decrease, and there will be a place for the storage of various things and relaxing.

    Other Renovation Services in Alta

    Serviced ZIP codes: 95701

    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.