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Avatar for Geico Builders
Geico Builders
5.0(
61
)
Basement - Remodel

Serving Castro Valley, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Free estimates

Warranties offered

"We hire Geico builders for our kitchen remodeling project, and I'm happy to share my experience: Working with Zaya and Geico Builders was a great decision. They were professional, friendly, and easy to work with. From the start, the process was smooth and efficient. The craftmanship of my remodel kitchen and attention to detail were exceptional, and the end result far exceeded my expectations. From the design phase to completion, their communication was excellent, and I felt completely at ease with them working in my home. The design solutions completely transformed my kitchen, making it both functional and beautiful. I highly recommend Geico Builders for anyone looking for a stress-free and satisfying remodeling experience."
Composite Deck Replacement Trex
Full Backyard Remodel with Outdoor Kitchen
Remodeling - Kitchen & Bathroom Project
Deck Replacement Composit
Composite Deck

+270

Response time1 day
Response rate100%
15 neighbors recently requested a quote
Avatar for Cal Green Remodeling
Cal Green Remodeling
5.0(
15
)
Basement - Remodel

Serving Castro Valley, CA and surrounding areas

Approved (Corporate)

In business since 2015

Free estimates

Emergency services offered

"We were looking to remodel our kitchen or bath for a few years. We kept getting estimates from different companies and always felt the price was off or the person was not a good fit. Then, finally, we met Shai with Cal Green Remodeling. What a great guy! He is very upfront and honest about what we can expect in terms of cost and work flow. Because of his honest approach, we hired him. We felt he gave us the good and bad and how to resolve the bad as well. In the end, the process was fairly smooth, and the few hick-ups we had, for example, the city and their permit process, were well explained to us at the beginning, so we were ready. Our kitchen or bath looks amazing, and I plan to work with Cal Green Remodeling again. Thanks Shai!"
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California

+51

Response time1 day
Response rate100%
14 neighbors recently requested a quote
Avatar for BUILDERS GROUP & DESIGN INC
BUILDERS GROUP & DESIGN INC
5.0(
21
)
Basement - Remodel

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"Every remodeling project comes with surprises, and ours was no exception. Instead of making excuses, Builders Group came up with practical solutions and kept the project moving. They were honest about costs, transparent about timelines, and handled every challenge professionally. That’s the kind of contractor you want on your side."
South San Francisco
South San Francisco
South San Francisco
South San Francisco
South San Francisco

+139

8 neighbors recently requested a quote
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Basement - Remodel

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"We hired McCormick Home Builders to remodel our living room, and we are beyond pleased with the result. The team was professional, worked efficiently, and Aris design ideas made a huge difference. The room feels so much brighter and more spacious. This was the best decision we made for our home, and we were already planning our next remodel with them."
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+1

Response time6 hrs
Recommended by17%of homeowners
Home Pro Remodeling & Construction, Inc.
4.1(
31
)
Basement - Remodel

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"Our roof was in bad shape and we needed to have it replaced. I had gotten estimates and decided to go with Home Pro Remodeling. Emil and Brian were our contact people for the project. Emil was very professional and paid attention to our concerns. He worked with us through the entire project to our complete satisfaction. Brian is extremely courteous and helpful as well! The project went very smoothly, was completed before the initial project end date, and the results were beyond our expectations. The job turned our beautifully! Our new roof looks FANTASTIC! Our neighbors have commented to us how great it looks. We are very pleased with our experience with Home Pro Remodeling and would definitely recommend them."
Response time5 days
Recommended by77%of homeowners
BE&D Builders
3.8(
4
)
Basement - Remodel

Serving Castro Valley, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"My project was a major renovation of a 1985 Victorian home that suffered a devastating fire. Erik and his team did a beautiful job following my architect’s plans, and was also proactive about calling out necessary changes. He was very patient with all of my changes and very specific requests, and was a very calming influence when unexpected surprises inevitably arose during construction. The final results are beautiful, and an historic house has been saved. I look forward to working with Erik again in the future!"
Remodeling - General Project
Remodeling - General Project
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - General Project

+11

Recommended by100%of homeowners
Avatar for Plumbing 1 Builder's Inc
Plumbing 1 Builder's Inc
5.0(
17
)
Basement - Remodel

Serving Castro Valley, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"Leo and Tony and Able are wonderful and amazing. They installed new shut off valves throughout the house and the main. New P-traps throughout, power washed all my decks and fixed two leaks on the second floor and repaired the ceiling. The most beautiful work was installing a new bathtub and tile surround. Able is an artist! Leo is so fair and honest and his team just works hard every minute they were at my house. Came when they said they would. Gave me updates. Did additional work that I asked them for. I would hire them again in a heartbeat."
Response time3 hrs
Response rate85%
52 neighbors recently requested a quote
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Basement Remodel questions, answered by experts

While bathrooms and kitchens are nearly equal in terms of renovation difficulty, kitchens are the most challenging. Kitchen design, layout, electrical, and plumbing needs all depend on each other for the success of the entire project, and mistakes early in the project can cause trouble later on.

It is generally more affordable to finish a basement than an attic, though it ultimately depends on how you plan to use the space. The average cost to finish a basement ranges from $7 to $23 per square foot, while attic renovation costs $30 to $60 per square foot. However, a simple attic conversion to a storage space will cost significantly less.

The difficulty of adding a basement to an existing house can vary depending on the house’s location, the size of the basement, and the type and condition of the existing foundation. Adding a basement is a job best handled by the pros, so you’ll need to enlist professional help for this project.

The best type of basement ventilation system depends on your budget, the moisture in your basement’s air, and the types of windows you have down there. You should consider all of these factors when choosing a ventilation system. However, the most effective method for basement ventilation is an energy recovery ventilator (ERV) or a whole-house ventilation system, which preheats or precools incoming air from the outside while also managing water vapor.

A finished basement must have a heat and electrical supply with an entrance that meets building code requirements, such as a stairwell to the home's main living space. It often must include finished walls, ceilings, and floors. If the finished basement includes a bedroom, it should have a heat source, an egress window, and a closet.

Remodeling, as opposed to finishing, means altering an already finished basement by adding a bathroom, bedroom, or living area.

The Castro Valley, CA homeowners’ guide to basement remodels

From average costs to expert advice, get all the answers you need to get your job done.