San Jose, CA  >

Room Addition and home expansion services with before and after transformations
Home Addition Contractors and home expansion transformations

Bay Area Home Addition Contractors

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 project so that our experienced home addition builders 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 entirety of your property. 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 concepts for your project.

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 your entire home addition project. This phase will include an estimate of pricing for the project, the anticipated process, and the expected timeline for the completion of your home addition project.

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 finishes of your home expansion project. Our showroom in San Jose will feature beautifully designed cabinetry, a variety of exquisite tiles and flooring, and many more materials to help you finalize your project.

Finalize Gameplan

As you decide on your finishes, we will provide you with the final drawings, layout, design, and 3D renderings so that you can truly see how the newly added rooms to your house 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 expanding your home!

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 construction phase. Your project manager will handle this process from A to Z since we are a full-service construction company!

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 and finishes needed for your room addition project from our most trusted vendors. These selections will give that final touch to your beautifully designed new home.


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 completion of your home expansion project.

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 home addition project timeline and prepare us for the next phase.

Preparation & Framing

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, drywall, plumbing, and other aspects needed to move on to the installation phase of your home addition project.


It’s finally here! The installation process is where your home expansion project begins to take shape and finally come 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 by our skilled room addition builders.

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 phase, 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 final phase of your home addition project.

Final Inspection

While it is hard to say goodbye, we know how excited you will be to finally enjoy your newly expanded and more functional home! So this final walk-through with your project manager will be the final inspection needed to bring your home addition project to completion.

5-Star Review!

If your project manager made your dream home a reality, 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.

How Do I Plan A Home Addition In My Area?

Before the first phase of construction for room additions in the Bay Area can start, you must first plan and prepare for this kind of home project. Some people create a list or digital idea books with pictures of completed projects.

Homeowners should be in constant contact with their home addition contractors about what elements they would like to incorporate into their new additional room.

How Much Does A Home Addition Cost?

There are different aspects to consider when estimating the cost of building a home addition. At Wise Builders, we are more than happy to meet with you and discuss some of these costs. We offer free estimates and will assist you with coming up with a cost based on your budget. Our breakdown of pricing options is what makes us one of the most sought-after room addition contractors in the Bay Area, CA.

How Long Do Home Additions Take?

The length of time for building a new room varies between general contractors. At Wise Builders, we work with you to create a reasonable project timeline. Building a small additional room, for example, likely would take less time than an entire home remodeling project.

Our timeline will include a schedule for the entire room addition building process from beginning to end. We believe in maintaining open communication and resolving any possible delays in your building schedule; that is why we’re the premium room addition contractor in the Bay Area, CA.

Steps To Build Additional Room In The SF Bay Area

As you prepare to build a home addition in the Bay Area, there might be some expectations you are wondering about. Not everyone has an entire budget to cover all the expenses for building a house add on. Whatever remaining questions you may have, our project managers at Wise Builders have the knowledge available to share with you!

How Do I  Finance A Home Addition?

Homeowners can set aside a percentage of their income to save for home improvement projects, but that can take years before you reach your budget goal. One popular method of meeting that goal is financing building an addition to your home.

Different cities in the Bay Area have resources on their websites with information on financing options for home remodeling projects. At Wise Builders, we also offer different types of financing to help you fund adding a room to a house. We are the go-to contractor for home addition in Sunnyvale, California.

Do Additions Add Value To A Home?

Anytime you add a new room to a home, it is highly likely to increase your home’s value. There are different factors to consider in evaluating the value of your home.

The size of the room addition project and the value of other homes in your surrounding area can also factor into the value of your home. Home additions in San Jose might increase a home’s value more, for example.


Types Of Room Additions In The Bay Area

Whenever a homeowner decides it is time to expand their home’s space, one of the first things home addition contractors will ask is, “Do you want to build upward or outward?”

Before choosing what type of room you want, you must decide whether it is better to build upon your existing one-story home or expand your home space outward.

Luckily, our team at Wise Builders will consult with you and help you decide to build outward or upward, depending on your needs, budget, and your city’s zoning regulations. We are the trusted choice for hiring a room addition contractor in Los Altos, CA and many other communities.

Family Room Addition

As your family grows, building a new family room addition is helpful. The new room can serve as a playroom or study room for your kids to work on their homework. When designing your new family room, we can help provide you with different suggestions, such as choosing the best lighting and color for the walls.

Master Bedroom Addition

Your master bedroom is your getaway room within your home where you not only sleep but rest and enjoy privacy. If you feel your main bedroom is not spacious enough, consider a master bedroom addition with us at Wise Builders! As the premier home expansion contractors in the area, we have completed projects multiple projects successfully in different Santa Clara county cities. As the best room addition contractors in Mountain View and beyond, people are constantly inquiring about services.

As an experienced home builder, we can help create a master bedroom that will make you feel like you are at a spa.

Other Types Of Home Additions

At Wise Builders, we have plenty of experience building a home addition on the sides of your home, in front, behind, or even above. We can help create an extra room that can have multipurpose, and this newly constructed room can be a gym or yoga room.

If you work from home, a new additional room can be an ideal space for a home office. We have completed successful home expansions in Campbell, California and many other communities.

House Additions Building Process For Bay Area, CA

At Wise Builders, we came up with custom design and building procedures to help us complete our different kinds of home improvement projects on time, on budget, and with your 100 percent satisfaction. Our transparent building process will guide us through each phase of building San Francisco home additions.

Room Addition Consultation

Before starting construction for a home addition, one of our expert project managers will meet with you to discuss your design-build ideas. Our expert in home expansions will next take pictures and measurements of the potential building site.

We then take all of the suggested ideas and measurements to help provide you with an estimate, timeline, and budget.

Finalize Plans For Adding A Room To Your House

We remain in direct contact with you as we finalize the design-build plans for your home’s new room addition. If you are in the area, we recommend meeting us at our showroom, where you can see, feel, and touch the materials from some of the vendors we work with.

You will be presented with different design concepts for your home addition in the Bay Area. Once you decide on a home addition design-build you like, we will present you with a contract with 100 percent transparency.

Home Addition Pre-Construction

Our project managers will then help gather the necessary materials and tools to prepare for your new room addition construction. We also use this time to secure permits before any construction work begins.

Start Construction For Additional Room

Construction for Bay Area home additions includes demolition, preparation, and installation of cabinets and appliances. Clean out the area and knock down any existing walls. Our experienced crew of home remodelers will then build the framework for the new room addition.

We then work with trusted subcontractors to build out any new plumbing, electrical wiring work, and HVAC (heating, ventilation, and air-conditioning) installation. Drywall is then installed as the work is being completed. Any new flooring and closet spaces are then built, followed by a paint job. As a transparent room addition contractor in the Bay Area, CA, we make sure to keep you updated throughout the entire project.

Wrapping Up And Presenting Room Addition

Before our San Francisco home additions project is completed, we will give you a walk-through of the work done. As the most trusted room addition contractor, we do our best to address any of your questions and implement any final design-build changes. 

We then clean up the area and ensure everything is ready for a presentation. We do one final walk-through and ensure we leave you happy and satisfied with your new room addition. Our assurances make us the go-to home additions contractors in Cupertino, CA and throughout the area.

Experience the Wise Builders Difference

It can be overwhelming trying to search for the best room addition construction company. There are many from which to choose. Whether you are looking for a home expansion in Saratoga, California or require trustworthy home additions contractors in Santa Clara, CA, the Wise Builders name is associated with quality design-build and construction work. You can depend on us as experienced and thorough room addition builders to complete the project with 100% efficiency. Our services get great reviews. People choose us to be their  and dozens of other cities. Contact us to get started.

Frequently Asked Questions About Room Addition Services

Do I Need An Architect For A Home Addition?

As a design-build company, we make sure to cover every aspect of a room addition project. That means we provide not only architectural services but also interior design and construction services. We work with different subcontractors that are experts in their fields. We make sure to collaborate with different groups to efficiently create home additions.

Are Home Additions Tax Deductible?

Certain home renovation projects such as room additions may be tax deductible if the house is sold within the same year.

Are Permits Required For Room Additions?

Yes, permits are required for home additions construction. At Wise Builders, we take care of securing the permits for you.

Can You Put An Addition To A Mobile Home In The Bay Area?

Unfortunately, you can’t add a room to a mobile home since the mobile home is prebuilt and can’t be modified.

Are You Licensed And Insured For Home Addition Work?

Wise Builders is licensed and insured when it comes to room additions services and other home renovation work. We are certified with the California Contractors State License Board (CSLB).

What Cities In The Bay Area Do You Provide Room Additions Services For?

We serve the greater San Jose area and the surrounding communities for house addition services. Don’t hesitate to contact us if you are interested in a consultation in your area.

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