HAIROLOGY SALON - castro valley's newest premier boutique hair salon.

Looking for the best hair salon in Castro Valley?

created by janet truong, bay-area native and 10 year veteran hairstylist.

Hairology Salon offers modern men’s haircuts and women’s haircuts, hair color transformations from conservative to edgy, brazilian blowouts, foilayage and balayage services specializing in blonde multi-dimensional hair. We love ash blondes.

wifi – getting a color service? bring your laptop and you can work while your hair processes at our color bar while enjoying a glass of wine, on the house.

we are currently accepting new clients.


Based on 95 reviews
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Eloisa BautistaEloisa Bautista
21:45 29 Jun 23
I recently moved to the Bay Area from Seattle and I’ve been needing a haircut. I came across Hairology on Yelp and all I can say is that all the positive reviews are true! I booked a haircut and blow dry with Janet.From the moment I walked into Hairology, Janet was very welcoming and sweet! She started off by asking me what I wanted to do with my hair and how much I wanted to cut off. She then washed my hair and began to cut my hair. I’ve never experienced a hairstylist who took their time with cutting my hair and made sure it was everything I wanted and more! She was very attentive with my requests. After the cut she dried my hair and styled it. My hair after the cut felt so much lighter and bouncier!!! Janet also gave me a lot of advice on how to take better care of my hair, which I really appreciated it because I had no idea how to take care of my hair since it’s curly and frizzy!Overall my experience at Hairology was amazing and one of the best experiences I’ve ever had at a hair salon! The salon itself was very clean and had such a cute look to it! I would definitely recommend Janet to everyone I know and I’m beyond happy to finally find an amazing hairstylist who I trust with my hair! I can’t wait to go back and get another haircut from Janet!!
Taylor RTaylor R
06:27 09 Jun 23
Deborah was awesome! My hair was in a sad state and I left feeling so much better:) she was very attentive to what I wanted and wanted to make sure I got what I was looking for as well as making sure my hair stays healthy. So so sweet and did her best to make me feel taken care of. Thanks Deborah!!! Def going back! Highly recommend
Jamie GordonJamie Gordon
03:55 17 May 23
Debra did my hair today and it was lovely. I loved her confidence and knowledge. I have very fine hair and get highlights. She corrected my coloring. The whole experience made me feel special. I still love Janet and Georgi. They do a great job too. Highly recommend this salon!
Angela HAngela H
13:45 11 Oct 22
Janet is the best, I'm so happy I found her - I finally found someone I trust with my hair. She worked with me towards my hair goals, while still being honest of what would be achievable. She suggested options that would look great on me, took great care of me the whole day and was a pleasure to be around. I found my go to hairstylist!
Uyen HuynhUyen Huynh
01:15 04 Aug 22
Janet is a great colorist! I loved how my color turned out. I received so many compliments. Janet was very nice and accommodating during the appointment process. While sitting and waiting for the coloring process she offered me drinks and snacks. She greeted every customer with a smile when they came in to asked for openings or pricing. Not to mention her pricing is reasonable. Not like other places who overprice hair coloring. I love this place. Parking was plenty and easy too.


Click the link below to self-book appointment. We will message you with confirmation!

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Store Hours

Sunday:          CLOSED
Monday:          CLOSED
Tuesday-Friday:  10am - 7pm
Saturday:        10am - 6pm


3036 Castro Valley Blvd,
Castro Valley, CA 94546


(510) 736-3776