Add comfort and value to your home with a Room Addition!
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Add comfort and value to your home with a Room Addition!
Let’s connect! Chat with our team about your project
Thank you for connecting with us!
One of our advisors will be
getting in touch with you shortly

Room Additions & Extensions

Getting your home addition or extension project off the ground can often be the most tedious part of a renovation. As a homeowner you’re looking to maximize your living space without sacrificing quality, and without emptying your wallet.
Treeium provides the best craftsmanship, artisans, and customer service and promises a successful and stress-free project from start to finish. Whether you’re looking to add a sunroom, new garage, or add an entirely new level to your home, Treeium is here to help every step of the way.
There are many reasons why homeowners are looking for ways to expand their existing home. Additions and extensions are often necessary as families grow, guest space is needed, or maybe you’ve always dreamt of having a sunroom and now is finally the time.
Design Your Dream Home Addition
Looking to add more space and make your home more comfortable? Additions come in all shapes and sizes, our design team will help you design the addition of your dreams to make your home more functional, comfortable and desirable.
Our Design Team
Each member of our pre construction team is an industry leading specialist in their respected field and offers a unique set of skills and expertise. With years of experience spanning decades in the design and building industry, the team is ready to work hand in hand to develop designs and plans that utilizes space in the most efficient and tasteful way possible.
What we offer you
Add comfort and value to your home with a room addition
Planning & Design
First & Second Story Additions
Space Reconfiguration
Garage Conversion & ADU’S
Local Room Addition Experts
Get Inspiered By Our Projects
Frequently Asked Question
Full Service Desing & Build Firm
Is it worth it to add on to my house?

If you are looking to increase the value of your home and are ready to go all-in on a time-consuming but rewarding investment, then you should for sure opt for a home addition. Not only does it give your home value, luxury, and convenience, but it also gives you a chance to add a bit of your own creativity.

What are the first steps I need to take to add to my home?

If you are interested in adding to your home you first need to find a good project manager who will help you:

  • Determine the Budget and Scope. …
  • Secure Funding. …
  • Work With an Architect & Engineer
  • Obtain Permits and Prepare the Site
  • Build the Foundation.
  • Frame the Structure.
  • Add the Sheathing and Roofing.
  • And Finishing touches

How much does it cost to add 400 sqft to my home?

Making your home larger by adding 400 Sq Ft will cost approximately $120,000 to $160,000 depending on the design, final touches and finishes.

Does my property tax go up when I add to my home?

When you do a major renovation or add a large addition to your property, you can expect your tax bill to go up. This is always the case when you add livable square footage to your home.

Customer Reviews
Alan R.
Woodland Hills, CA
Great work and coordination by Treeium for the installation of my home solar system. Particular praise is due for project manager Ashley Arndt who patiently nudged the DWP and L.A. Building & Safety bureaucracy forward while preventing me from becoming overly fretful due to the entire process taking nearly three months. The lead installer Eugene and his crack team installed the entire solar panel system and inverter in one day during 100 + degree heat along with Danny who patiently verified the system. The proper installation and verification...
Carol M.
Carlsbad, CA
I wish I can give 10 stars! I've been in my home for about 4 years now and have always contemplated solar & battery backup. After hearing about the tax credit going down, I got to researching. I found Treeium online, reached out, and they were the first company to come out. Arvin was very professional, informative and made an honest recommendation based on my needs. I also got two more quotes, but none were as comprehensive or as high quality in terms of the setup. The choice was clear. The process went smoothly, and we wer...
Mike T.
Los Angeles, CA
We found Treeium to truly be a company that is on our side. Not only do they provide great product, service and support but they are proactive on rebates and tax credits as well as financing making the process easy, reliable and trusted. From our solar panels to our solar hot water heater and tesla batteries, could not be happier.
See what our clients have to say!
Kathryn Pitt, an artist that needed more space to explore her creativity skills as a artist.
Kathryn Pitt
ADU Addition
Sherman Oaks, CA
The Borjas had a huge decision to make - which company should they hire for their bathroom remodeling and room addition?
Michael and Cynthia Borja
Room Addition
Orange County, CA
Renovating is hard,
but we’ve got your back.