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

Expert Home Addition Services in the City of Cupertino

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 in Cupertino 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 in Cupertino, California.

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 in Cupertino!

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 in Cupertino, CA!

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 in Cupertino.


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 Cupertino 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!

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Ready to move forward?

Begin your home remodeling project with us today with our free in-home consultation.

A room addition in Cupertino is a great way to add functionality and value to your home. It is becoming a popular way to transform your current residence into the home you’ve always dreamed of. Before embarking on the project, you need to look for inspiration and make concrete plans to avoid setbacks. 

You should do your due diligence before choosing a Cupertino home addition contractor. This will easily be the most important decision you make throughout the process. A skilled and reputable contractor will ensure everything is built correctly and done in a time and cost-efficient manner. 

Being educated about the construction process for your home addition in Cupertino will help you make informed decisions. You must know about the different types of room additions and all the financing options available. Wise builder is here to educate you on the entire process, so without further ado, let’s jump right into it! 

How to build an addition to your house in Cupertino?

A home addition in Cupertino is not a construction decision that’s made on a whim. You will be investing time and money, so it’s important to consider the advantages and disadvantages after determining the purpose of your home addition. Building a home expansion Cupertino will consist of choosing materials, getting permits, and making structural plans.

Whether you plan to create an additional room or you want an office, setting goals and making plans before embarking on your home additions in Cupertino, California – is pivotal. 

Housing additions needs VS wants

Before starting your home addition project, you must determine your wants and needs. Your needs for home additions in Cupertino, California can include needing an extra room for kids or office space for remote work. In contrast, your wants can include utilizing a specific material. Emphasize your needs when discussing plans with your room addition contractor in Cupertino.

Does a homeowner need a permit for a home addition?

Big projects that involve considerable changes to the exterior structure of your home require a permit. Municipalities have different rules, and it is crucial to check the local government or city’s website for queries. You can contact the City of Cupertino website for the online permit application. Make these wise remodeling decisions to avoid problems down the line. 

Your contractor should take care of the entire permit collection process, which is why it’s important to hire a room addition builder with experience. Permits are also necessary for ADU building in Cupertino, California

How much is a room addition in Cupertino, CA?

The average cost of a Cupertino house add-on in the bay area is $350-500/square foot. These numbers also depend on labor costs, raw material prices, economic conditions, and more. If the average size of building an additional room in Cupertino is 150 square feet, the overall cost can be $67,000. Suppose you want to add bathrooms or kitchen renovations in Cupertino, then expect an additional average cost of $350-500/square foot. 

How long does it take to build a home addition?

Construction time for housing additions in Cupertino, CA, can depend on several factors. Typically it will take anywhere from two to eight months. The process typically includes the following stages:

  1. Initial planning – this includes the consultation and ballpark pricing. 
  2. Designing the theme and structure – this includes determining the scope of your project, analyzing your house, and finalizing the design drawing. 
  3. Contract signing – this consists of completing construction drawings, acquiring permits, reviews, and revisions.
  4. Construction phase –  the building begins!

How to finance a house addition in Cupertino?

A home addition can be expensive, therefore it is important to consider your different options to finance additional room construction in Cupertino. The financing options depend on your credit score, interest rates, and mortgage.

Here are the common methods you can use to finance your addition to home: 

  1. Home Equity Line of Credit (HELOC) – You can calculate how much mortgage you own and subtract it from the current value of your home. The difference is your equity. You can borrow against a percentage of the number with variable interest rates
  2. A home equity loan can be acquired as a second mortgage. You have to make monthly payments as soon as you receive the loan.
  3. Personal loans are also a fast and flexible option for acquiring financing.
  4. You can use the credit card for smaller purchases in the project, like buying tiles for the bathroom. 

How much will an addition increase home value?

Yes every type of room addition adds value to the home. Studies show that adding a 3rd bedroom can increase 6.2% resale value and add an average increase of $22,000. If you want to renovate bathroom in Cupertino, CA, it can add 5.7% of value and lead to an increase of $18,000 in house resale value. In simple words, you can increase your house resale price significantly by investing in any home addition, such as a living room addition in Cupertino, CA.

Best types of room additions

There are various options available for adding onto your house in Cupertino. You have to consider your living space to determine what fits while also trying to use your imagination. Here are a few types of options for your home expansion in the SF Bay Area:

  1. Sunroom addition in Cupertino 
  2. Office addition 
  3. Living room addition
  4. Laundry room addition
  5. Family room addition


Living room additions

Living room additions are one of the most popular types of adding rooms to a house. It will also contribute to the aesthetic and overall functionality. There are a few different routes one can take when building a living room addition, so it is important to study your property to decide where it makes the most sense to add this new room. 

How to build a sunroom?

Building a sunroom starts by selecting the windows and determining the electrical requirements of the room. Second, choose the best flooring option, keeping the sunlight factor in mind. Once the material selection and mapping are made, frame it up. Install your door and windows and get the electrical wiring and fixtures done. In the last stage, finish the interior and exterior. Make sure to contact professionals who can provide advice on remodeling homes in Cupertino.

How to pick a room addition contractor near me?

It would be best if you trusted a reputable local room addition contractor with good reviews. Experienced contractors will give realistic timeframes and utilize resources efficiently. You can use the tips listed below to help you hire the best room addition contractor near me:

  1. Get recommendations 
  2. Compare portfolios 
  3. Check references  
  4. Compare estimated costs, timeframe, and project details 
  5. Be informed about the requirements 

These tactics will allow you to narrow down the best room addition contractor in Cupertino. 

Credentials, licenses, and insurance for house addition contractors

A way to narrow the contractor list is to ask for the certification and licensing. California State requires contractors to hold a valid license from CSLB. You can verify the contractor’s license by calling (800) 321-CSLB (2752) or entering the license number online. You should do this for every contractor you consider when you search for home additions contractors near me. 

Ensure that workers are covered under worker’s compensation insurance, and ask for a copy of the insurance from your local room addition contractor to check if it is up to date. Moreover, it would be best if you also held liability insurance in the event of any injuries or damages. This is especially important when hiring custom homes builders in Cupertino, CA

Do you need an Architect for a Home Addition near me?

Hiring an architect for your room addition is a plus, but it is not required. Typically, your Cupertino home addition contractor should be able to handle the process from A-Z. Nonetheless, a licensed and experienced architect will polish your design and give an attractive end result. However, there is no such law that makes architect involvement necessary. 

Cupertino real estate market trends 

As of September 2022, Cupertino market prices dropped to 13.9% compared to 2021. The median price stood at $2.3 million, and the average home took 15 days to sell on the market compared to 8 days in the previous year. The current median sale price is $2,320,000. 

Affordable housing in Cupertino, CA

The Cupertino BMR rental program supports very-low-income households. The purpose of this program is to generate affordable housing units for city residents. The program will work on a priority point basis. The 2023 waitlist will be open from October 1 to 31, 2022.

Frequently asked questions on room addition services in Cupertino

What type of loan is best for a home addition?

Compared to other options, a home equity loan or HELOC might be the best option for a home addition. This is because the rates for an equity loan are often a lot more appealing than a personal loan. You can also aim to acquire RenoFi loans. These loans are based on the value of your home after the room addition construction or renovation takes place. 


Does a sunroom count as square footage?

Typically, sunrooms are not included in the home’s total square footage. However, it can be included if the sunroom is cooled and heated by the main HVAC system for the entire house. It also has to be well integrated into the home and cannot have a separate entrance. If it meets these criteria then it will be included in the square footage and therefore increase the home value when it is being appraised. 


Is it cheaper to add an addition or build up?

It is cheaper to build up rather than building a room addition. This is because it requires less material and labor. However, most cities have limits on allowable heights for houses so it may not be an option to build up when you want to increase the livable square footage of your home.


Is it worth it to add a room addition?

The simple answer is – it depends on your needs. Home addition construction is not always a quick and easy construction process. However, you can increase your property value while also adding much needed space, so in many cases it’s a win-win!


How big should my room addition be?

When deciding on the size of your room addition you need to consider the overall space and function. If you’re looking to construct a master bedroom addition, you will typically need more space because you will want to fit a king size bed, walk in closet, and a bathroom. For a sunroom or office, you will probably need significantly less space. Your room addition contractor should help you determine the size while taking into account material, permits, and labor.

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