Home Additions Portola Valley Free Consultation, 30+ Years
An extra bedroom, a larger kitchen or a new home office. Preferred Builders designs, permits and builds home additions that blend with your existing house for homes in Portola Valley. We handle home additions in Portola Valley from design to final inspection.
LICENSE #1123883 · OVER 30 YEARS IN CONSTRUCTION & REMODELING
Request a free consultation
Tell us about your project, and one of our representatives will get back to you shortly.
By sending this form, you agree to be contacted about your project. Privacy Policy
Before the foundation
Add the space you need to the home you love.
Our team designs and builds room additions that improve both the function and the look of your home. Whether you need an extra bedroom, a larger kitchen or a new office, we plan the addition so it feels like it was always part of the house. That is how we approach home additions in Portola Valley.
THE FIT
Blend old and new.
Match rooflines, finishes and flow so the addition feels original to the home.
THE DESIGN
Plan it in 3D.
Our in-house designers plan the space, and 3D models let you review it before construction.
THE PAPERWORK
Permits handled.
Additions need permits. We prepare the plans and handle the City submittals and inspections.
What we take care of
What your home addition can include.
Each addition is planned around your lot, your existing home and the way you want to use the new space, planned for home additions in Portola Valley.
Living
Room additions
Add a new bedroom, expand your living area or create a dedicated home office.
Cooking
Kitchen additions
Build a more spacious kitchen, a breakfast nook or a cooking space designed around how you entertain.
Bathing
Bathroom additions
Add a primary bath, a practical guest bathroom or a powder room.
Design
Design and 3D models
See the addition in 3D before construction so layout and finish decisions are clear.
Planning
Plans and permits
We prepare the drawings, secure the permits and coordinate the City inspections.
Finish
A seamless connection
Tie the new space into the existing home with matching finishes, flooring and flow.
Home Additions in Portola Valley
Home Additions in Portola Valley, planned for your home.
The San Andreas Fault bisects Portola Valley, and building on its hillsides brings real challenges and restrictions. An addition may require review by the Architectural and Site Control Commission, and some projects may need a Site Development Permit from the Planning & Building Department. Our designers use 3D models to show how an addition fits your site.
Home Additions in Portola Valley: our Milpitas office and Portola Valley, about 19 miles apart in a straight line.
The permitting agency makes the final call on what your scope needs. We confirm the requirements for your project, secure the permits before construction starts and coordinate each inspection through to the final sign-off.
What we coordinate for you
Site review and design plans
Permit and planning submittals with the City
Drawings for your HOA review, when required
Inspections scheduled during construction
Final inspection before close-out
How we work
From the first visit to the final inspection.
Four clear stages for home additions in Portola Valley, so you always know what happens next.
01 / WE MEET YOU
We listen.
Call us or send the form to schedule a free, no-obligation consultation. We review your budget and brainstorm ideas.
02 / WE DESIGN IT
We plan.
Our in-house designers create plans and 3D models for your approval.
03 / WE PERMIT IT
We prepare.
Once you approve the design, we secure the necessary permits and confirm the schedule with you.
04 / WE BUILD IT
We create.
Construction begins once the permit is issued. We pass the final inspection, and your project is complete.
Our work
Recent projects by our team.
Real homes built and remodeled by Preferred Builders in San Jose, Walnut Creek and San Carlos.
San Jose, CA
Addition and full-house remodel
A home addition plus a full remodel, including the kitchen, bathrooms, painting and flooring.
Don’t see your question? Call (669) 588-3929 and talk to our team.
Planning an addition
Does a home addition need a permit?
Yes. Additions require a building permit, and some projects also need planning review. We confirm the requirements for your lot and handle the submittals.
Addition or ADU?
An addition expands your existing home. An ADU is a separate living unit with its own entrance. We help you compare both for your lot and goals.
Design and process
Will the addition match my house?
That is the goal. We plan rooflines, materials and finishes so the new space blends with the existing home.
Do you offer design services?
Yes. Our in-house designers create the plan, and we use 3D modeling so you can see the result before construction begins.
Home Additions Portola Valley FAQ
Who issues the permit for home additions in Portola Valley?
Town of Portola Valley Planning & Building Department, 765 Portola Road, Portola Valley, CA 94028. We confirm the requirements for your scope and secure the permit for your home additions in Portola Valley.
Do you serve all of Portola Valley?
Yes. We handle home additions in Portola Valley and across San Mateo County from our office in Milpitas. Call (669) 588-3929 to arrange a free, no-obligation consultation.
