Home Additions

My new ADU Addition looks absolutely stunning! They really helped improve the quality of my home.

– Malcom Bell

ADU builder

Our trusted team of home builders are standing by to help you improve the value of your home.  Weather you are looking to add room addition living space or building an ADU – accessory dwelling unit – aka granny loft, we can dot it.  Even if you are in a hillside area, we can take care of all engineering, soil testing, piles, and foot soldier retaining walls, and foundation to meet all soil types.

A room addition to a home allows a growing family room more space to your single family home.  Your investment into a room addition is a smart way to increase your capital and write it off as capital expenditure.

An ADU – Accessory Dwelling Unit, on the other hand, is a separate dwelling and can be an attached building or a detached building on your existing property.  We can even convert your garage as a home addition or convert your garage as a separate dwelling addition.



Bath repairs are one of the strongest Return on Investments (ROIs) for a home. If you need new tile, an application of grout, or a full bathroom renovation, we are here to help!


Kitchen repairs can help to make your life at home easier, while simultaneously increasing the overall value of your home. Bring your kitchen up-to-date with the installation of the latest and best appliances.  Let us be your home additions builder.


Stay in your home and let us create more space in your home through a new addition.  We can design, permit, and build your addition.  Increate the value of your home and property through a new addition that will allow a growing family to stay together.  Let us be your home additions builder.

ADU – Accessory Dweling Unit

Create an R.O.I. asset by investing in an A.D.U. then renting it out for around $2,400.00 per month.  It’s another building on your property lot that has a separate entryway, a separate electrical panel, a separate water meter, and a separate gas meter, so you turn your liability into an asset for a fraction of buying a house sticker price.  Let us be your home additions builder.


additions builder

A1 Home Builder is an ADU Additions Builder.  An ADU is an Accessory Dwelling Units that stands alone on your home lot or can be attached to your home.  Either way, a separate entry way for the ADU will be designed, as well as a separate Water meter, gas meter, Electric meter, and a separate address.  We are a fully licensed California G.C. general ‘b’ contractors.  Let us provide you with a Free estimate.  We handle the entire project from  interior design, planning, permitting to construction.

We are committed to building the absolute best quality home to each and every one of our customers.  We are licensed by the California State Contractor board, license # 885624, since 2006 as a general b contractor, c-10 electric contractor, c-36 plumbing contractor, and c-20 HVAC contractor.  During which, we’ve handled many projects in and around Southern California.  Our best package right now is building accessory dwelling units as home owners want to rent out part of their property to turn a liability into an asset.

We design beautiful bathrooms and beautiful kitchens to go along with your addition space.  Our bathrooms are built to look great and last for ever.  Tiles are one of the benefits of building a new addition is that you can design it, or let us show you what we can do.  We make our own custom cabinets so you are sure to have a sturdy kitchen as well as beautiful because we don’t use off the shelf cabinets that are light and cheap.

Client Testimonials

Linda Wilson

I can’t say enough about their kitchen cabinets work! The counter tops and sink is amazing.

Donovan Bass

I absolutely love my bathroom! I love my new vanity, sink and shower, and the new tile looks absolutely stunning.

Taylor Anderson

The workers were courteous and friendly. They really made my home addition weather the storm.

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