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

Dependable Room Addition Contractor in Sunnyvale, 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 in Sunnyvale 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 in Sunnyvale.

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 in Sunnyvale 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 in Sunnyvale, California!

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 in Sunnyvale.

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 Sunnyvale.


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 in Sunnyvale.

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.

Room addition in Sunnyvale is a great way to add value to your home and improve your quality of life. It is a significant home improvement project and there are multiple different types which cater to homeowners’ needs for living space, style, and budget. 

However, compared to most home remodeling projects, a room addition is one of the more time-consuming, complicated, and expensive. This is because it includes digging and installing foundations. Therefore, homeowners should opt for a professional home addition contractor in Sunnyvale to complete the job.  

Are you planning to make a room addition to the existing floor plan? Here’s a comprehensive guide covering all the nitty-gritty details about home addition services in Sunnyvale, CA. Read on to learn all the steps and must-knows about the project. 

What are the steps for home addition in Sunnyvale, CA?

The first step for room additions Sunnyvale is to consult with a professional contractor. You should ask them all your questions and determine what kind of addition will best suit your needs. It will also help you figure out how big of a home addition in Sunnyvale, CA, you can realistically add to your existing floor plan, given its location and the size of your lot.

Once you determine the scope of your room additions in the SF Bay Area, schedule the construction and participate throughout the entire process to ensure that your vision for the project is realized. 

Check the step-by-step guide when making house add-ons in Sunnyvale here. 

  • Determine your budget and secure funding
  • Choose an experienced home addition contractor in Sunnyvale
  • Get permits and build the foundation.
  • Frame the structure and add roofing.
  • Complete the landscaping and punch list. 

Create a budget and timeline for a room addition project

It’s mandatory to prepare for the work involved in the room additions Sunnyvale project and be realistic about your budget and timeline. The project can cost between $50,000 to $70,000 range. Assuming you have the necessary permits, a room addition in Sunnyvale generally takes 12 to 18 weeks to complete. However, the timeline depends on several factors, including the size of the addition, the interiors, and the availability of the Sunnyvale room addition contractor. 

How to get a permit for a room addition?

Just like kitchen home improvement in Sunnyvale, CA, room additions also require a valid permit. Apply for a permit to the Department of Planning and Development, deposit the fee, and get a permit for home addition in Sunnyvale, CA, within a few weeks. Permit prices can range from $100 to over $1000 depending on the size and scope of renovation. When searching for room addition contractors near me – ask them about the permit collection process as they should take care of this for your from A-Z. 

Can you finance a home addition in Sunnyvale?

Yes, it is possible to finance home additions Sunnyvale. There are a few options available to potential borrowers, including traditional bank loans, home equity lines of credit, and personal loans. Each option has pros and cons, so it’s important to compare them before securing funding for home expansion in Sunnyvale. 

Home Equity Lines of Credit typically offer low-interest rates but are difficult to qualify for. On the other hand, personal loans have higher interest rates, but they can be easier to qualify for even if you have bad credit. If you cannot qualify for a bank loan, several other ways are available to secure funding for room addition services in Sunnyvale. 

How much value will an addition add to my house?

In most cases, housing additions in Sunnyvale, CA can add somewhere between $30,000 to $50,000 to the potential resale value of a house. However, the final value depends on various factors, such as the location of your property, existing home value, and the size and look of your new home additions in Sunnyvale, CA. 

How long does it take to add an additional room?

It usually takes about 3-4 months to add an additional room to your home. This time frame can be shorter or longer depending on the complexity of the project and the availability of materials and labor. It also depends on the Sunnyvale home addition contractor you have chosen to complete your project. 

Adding an additional room is a significant undertaking, so it’s important to make sure you’re working with a reputable Sunnyvale room addition contractor who can complete the job promptly and efficiently. 

How much to add an addition to a house?

Look for the best home addition contractors near me who can accurately estimate the project’s cost. Just like ADU Construction in Sunnyvale, California, the overall price of room addition will vary depending on the size and complexity of the project. Generally, you can expect to pay anywhere from $50,000 to $70,000 for an addition,

It is advised to get quotes from the best local home addition builder and find the best deal that caters to your budget. 

Types of Room Additions

Before you get into the local home addition construction project, you must know about different types of room additions to choose from. Each type of room addition has its own set of benefits that can improve the overall livability and value of a home. No matter what type of room addition you are looking for, consult Wise Builder and get the home addition done without costing a fortune. 

Sunroom Additions

A sun room addition in Sunnyvale, California, is a great way to add extra space and light to your home. This kind of room addition is a popular choice for homeowners in Sunnyvale because of the mild climate. It can be used for various purposes, such as an office, playroom, or dining room.

What is a laundry room addition?

Laundry room additions Sunnyvale can add value to your home while increasing its functionality. This type of home addition can be used for several purposes, including laundry, storage, and even an extra bathroom. However, like other Home Remodels in Sunnyvale, CA, it is a challenging task and should be done with professional expertise. 

How to find a home additions contractor near me

Wondering how to find the best room addition contractors near me? There are a few tips on how to find the right one for your project. Get recommendations from friends or family who have recently had work done. You can also read online reviews and compare ratings of different contractors. Whether you are looking for a New Construction Home in Sunnyvale, CA, or to remodel an existing project, connect with a licensed contractor like Wise builders, and get the home addition done easily. 

How much do room addition contractors cost?

Most room addition contracts cost about $80 to $200 per square foot, including material and labor. This means that the cost of a room addition project will vary depending on the size of the room being added. However, other factors also affect the overall cost, including the complexity of the design and the quality of the materials used. It is a wise remodeling decision to go over the costs with your contractor in the beginning of the process. 

Ensure your home addition contractor is licensed and insured

Any home addition contractor you consider hiring should be licensed and insured. This will protect you if something goes wrong during the project. Make sure to request proof of insurance and license before hiring a contractor. 

Take your time choosing a home addition contractor, and do your research to ensure you select the best possible company for a wise construction project. 

What to do in Sunnyvale?

If you’re looking for things to do in Sunnyvale, you won’t be disappointed. There are plenty of options for activities, whether you’re looking for something to do indoors or outdoors. You can check out one of the many museums or art galleries in the area for a relaxing vacation. 

However, you can also turn to parks and hiking trails if you want something more active and adventurous. 

How much is an average house in Sunnyvale, CA?

The average housing market in Sunnyvale, CA, is highly competitive, with an average house value of $1.66M, trending up 6.5% year-over-year. Home appreciation in Sunnyvale has been 163.9% over the last ten years. However, you can also add more value to your existing home by adding Remodeled Bathrooms in Sunnyvale

Understanding the different types of home addition services available in Sunnyvale is imperative. Whether you’re looking to add an extra room to your house or want to renovate your space, there’s a service that can help you achieve your goals. Hire the best room addition contractor in Sunnyvale and bring your imagination to life.

Frequently Asked Questions About Room Additions in Sunnyvale, CA

How much does a laundry room addition cost?

Adding a laundry room to your home is a great way to increase its value and function. The average cost of a laundry room addition is around $230 per square foot. This price includes the cost of materials and labor.

How much does a room addition permit cost?

The answer to this question can vary depending on the size and scope of your project, but in general, a room addition permit will cost around $5 to 21 per $1000 project cost. You will definitely need a building and electrical permit – which usually also involves a $100 application fee.

How to design an addition to a house?

The first step to designing a room addition is asking yourself why you need more space and what are the objectives for this house add-on. Once you’ve determined the problem you want to solve, then look for inspiration, create a vision board, and make a wish list. 

What are construction loans for room additions?

Construction loans for room additions are typically short-term loans used to finance the construction project. These loans are based on the future value of your home after the intended construction or renovation project. However, the lender will not give you money upfront – the way they do with a traditional loan. Instead, money will be released in smaller increments, known as draws, throughout the construction job. 

How much is a small home addition?

The average cost of a small home addition is between $80 to $200 per square foot. The price will vary depending on the addition size, the materials used, and whether or not you hire a professional contractor. A 10×10 room addition will typically range from $8500 – $15,000.

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