San Jose, CA  >

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

Room Addition Contractor Services in San Jose, CA

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 home addition 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 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.

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.

There’s always room for improvement when decorating your home. Luckily, reaching out to a San Jose home addition contractor can be the best way to make your home look unique. Only the best contractor companies can transform a house from plain to the gem of the neighborhood.

Many contractors claim to be professionals, but not all can provide subpar services for room additions in San Jose. So, finding someone who could handle your home improvement project professionally is essential.

When it comes to home additions San Jose construction projects, Wise Builders is an excellent option for you because they have a long-running reputation in the industry and have the best solutions for you.

How to Plan a Room Addition in San Jose, CA

Before you start, the first step is to plan the process and consult with a room addition contractor in San Jose. At Wise Builders, we have project managers who are experts in many renovation projects ready to meet with you and provide consultation.

Taking the time to plan your room additions in San Jose is the best way to save you from trouble in the future. Preparation is vital, and that directly applies to home improvement projects.

Homeowners should contact their San Jose home addition contractor to find the most suitable changes for their project.

How Much Does a House Addition Cost?

Various factors count while determining the cost of a house addition in California. At Wise Builders, we’d love to look at your property and give you an estimate of the final price to get the job done. One of the reasons we’re the top home additions contractors is because we will walk you through the process of adding a room to your house.

Once we understand your budget, we consult you on which materials to use best for you. After understanding what house additions you request, we develop different designs and 3D illustrations and present that to you with an accurate project cost.

How Long Does it Take to Add a Room Addition?

The duration for home additions usually varies depending on the changes we will be constructing on the house. As an experienced general contractor, we believe in transparency. Before we even start construction, we give you a detailed breakdown of how long the project will take.

As one of the top reviewed room addition contractors, we aim to stay within the project time frame and immediately communicate with you if there are any unexpected delays due to weather, for example. Communication is key to every successful home renovation project, so we’re the go-to choice for home expansion in the Bay Area.

Whenever we encounter a delay, we work diligently to resolve it and get back within schedule. Wise Builders takes creating home additions seriously, leaving you with a renovated home you can be proud of.

With Wise Builders, you will have peace of mind knowing your home is being taken care of so you can come back and live with your new house add ons.

Steps to Build Home Expansion in San Jose

Most people seeking our room addition construction services are working for the first time on such projects. And it is okay not to know about every step involved in constructing a home addition because our project managers are here to guide you during each phase.

Our project managers at Wise Builders will answer all your queries and share their process with you as a responsible home addition contractor. As you prepare for a home renovation project, make a list of questions to ask our team so that you gain more knowledge.

How to Finance an Addition to Your Home?

Setting a budget aside for a house addition projection takes time, and even then, it might not be enough. In that scenario, it is best to seek available financing options. One of the reasons homeowners choose us as home remodel contractors are because we may recommend financing options for your project.

Not all local contractors are familiar with financing options like we are, but that’s precisely what makes our project managers the right choice for your projects. However, clients short on finance can look for alternatives to cover a San Jose home addition cost, such as:

  • Government-based grant programs
  • Home Equity Loan
  • Personal Bank Loan

These financing options are valuable for a room addition San Jose project, and other renovations like a bathroom remodel in San Jose, CA. Homeowners should be able to improve their houses to feel better accommodated.

How Much Value Will an Addition Add to My Home?

The exact value increase from adding on to your house varies according to the kind of changes you make. Fortunately, as one of the most knowledgeable room addition contractors in San Jose, we are constantly asked these types of questions. Although we can’t pinpoint an exact number, we can recommend features that can improve your property.

Different factors can affect the value of a home, such as location, proximity to school, and the value of nearby houses. A construction company may not have the tools to calculate this number, so it may be best to speak with a realtor or broker for more information.

How to Build an Addition to Your House?

Building a room addition San Jose project is about blending your perception of the project with our approach. Therefore, we ensure consistent communication throughout the project to ensure you know what you are paying for.

It’s the perfect way to avoid unfortunate surprises and stay updated with the best options for additions to homes. Our project schedule is split into phases to help you follow the progress. Before we even start demolishing walls, we take care of obtaining any required San Jose house addition permit.

Although construction work causes a lot of dust and dirt, our crew ensures they’re responsible by cleaning up after each work day. We also safely dispose of unwanted material to ensure we comply with regulations. Our dedication to respecting your space makes us popular home builders too.

At Wise Builders, we have professional subcontractors we employ to take care of mechanical work such as plumbing and electrical. These experts have helped us complete other projects, such as a kitchen remodel in San Jose.

Types of Home Expansions in the San Jose Area

The first question homeowners should consider before signing up for custom house additions San Jose, CA projects with us is if the changes will be upward or outward. This simple division creates more perception in the design, making it easy for clients to decide. Here are the different kinds of custom room additions San Jose we can design and build.

Family Room

As your family grows, room additions can become essential and provide much-needed space. Kids need indoor space to play while being kept under supervision.

Room addition contractors in San Jose are trained to upgrade your interiors, reducing the need to relocate someplace new when you feel like you’re running out of space. A family room is ideal for growing families. As the top room addition contractor in San Jose, we built plenty of family rooms for happy clients.

We’ll also help you pick the right color and lighting to keep the designs aesthetically pleasing in the long run. We also consider your children’s safety when designing where electrical outlets will be placed.

As your children become adults, we can also build a smaller home on your property to accommodate them. We not only make room additions but are also an ADU contractor in San Jose, CA.

Master Bedroom

Adding to your master bedroom is the quickest way to elevate your home look and get the best results. You can extend the space in this room to add a walk-in closet or include features to make you feel like royalty. We are the industry’s home addition construction San Jose experts who can make your master bedrooms look more extensive and luxurious.

Other Types of Room Additions

Professionals at Wise Builders offer several other services for our clients, allowing them to make additions upward, downward, or sideways, depending on their vision of the upgrade. We can help you construct a new section, such as a gym or a yoga room.

As one of the area’s most sought-after home additions contractors, we can build a new room to your house that can be used as a remote office for your work or a study and playroom for your kids.

How to Find a Contractor for Home Addition near San Jose?

Finding a contractor for home additions near San Jose can be challenging, but some of the following tips can help you. Look up reviews and testimonials from past clients. Our website has many reviews, video testimonials, and an online portfolio of previously built room additions.

While you check our website, you can also check our past projects for a complete home remodel in San Jose.

Do I Need an Architect for a Room Addition?

We understand architectural planning in home additions is crucial, so we also provide these services. We have interior design and construction services to help you complete your home additions professionally.

We are a design-build and construction company, and architectural design is just one of the many different services we have available to help complete your room additions. Instead of hiring an architect and a home addition company San Jose separately, choose Wise Builders to receive a complete and satisfactory service.

Home Addition Contractor Near Me

The San Jose area contains different room addition contractors ready to build and transform your home. You can depend on us at Wise Builders if you want any room additions and want to find a service that delivers on-time project completion and affordable services.

Book an appointment with us today, and let our professionals get started with the home additions. We are available to meet you at your home, or you can schedule a consultation in our fantastic showroom for further assistance.

We have constructed hundreds of beautiful rooms for many happy families, and we’re ready to do the same for you! If you are seeking to move, we highly recommend you take advantage of our services for new construction homes in San Jose, California.

Information about San Jose, California

The area collectively called the South Bay is surrounded by the mountains in Silicon Valley, making San Jose the technological hub in the region. It is one of the fastest growing areas in the state and has increased in population. People moving to San Jose have increased property value and demand for home additions; therefore, our experts at Wise Builders are high in demand.

Things to do in San Jose

San Jose offers some of the best places to visit for tourists and those moving to the area. It has some breathtaking sites and visiting options to make your life in northern California unforgettable. Here are some top-rated locations visitors should check out during their visits.

  • Alum Rock Park
  • Cathedral Basilica of St. Joseph
  • Rosicrucian Egyptian Museum
  • San Jose Museum of Art
  • Tech Museum of Innovation
  • Winchester Mystery House

All kinds of cultures and cuisines are waiting for you in San Jose, making it the best place to move to in the US. San Jose will be the perfect place for you to dwell for years!

Home Additions San Jose Frequently Asked Questions


Are Room Additions Tax Deductible?

The room additions can be tax deducted if the homeowners sell the property during the same year or 12-month period. However, the completion year needs to be the same.

Are Permits Required for Home Additions in San Jose?

Yes, homeowners need permits for home additions in San Jose construction projects, but our experts at Wise Builders can take care of it for you.

Can You Put an Addition to a Mobile Home in San Jose?

Get in touch with Wise Builders and one of our project managers will see if room additions for mobile homes are available in your area!

Are You Licensed and Insured for Room Addition Work?

Yes, our experts at Wise Building are insured and licensed for the room additions work you need. Feel free to enter our license number on the California State License Board if you’d like to confirm.

Do You Provide Home Expansion Services in Other Cities Near San Jose?

Yes, we provide home expansion services in other cities like surrounding San Jose. Contact our experts for complete details about room addition consultations in your city.

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