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.



from our clients

Janet worked a miracle on my hair! I came in with grown out hair color, a mess, and she was patient and very professional with what my options were. The salon location is perfect. The salon is gorgeous and super clean. I'll be a Janet client for all my hair needs!

Norma Zeitz

I LOVE LOVE LOVE this new salon!!! Janet is amazing. Staff are friendly and courteous. I love my haircut and color. This is a beautiful new place!!!!!

Andrea Reardon

Go see Janet! She is amazing at what she does especially getting your hair to a perfect blonde! Mind you, my hair is naturally black & she was able to get me to a blonde with little to no breakage. I highly recommend!

Ngoc Linh

Omg! I'm so excited about this place! I have always had issues with my long and thick hair. This place took me in a wreck and put me out glamerous.I feel like I had new hair! So beautiful! Thank you hairology for making me feel beautiful! Wonderful staff and wonderfully clean salon. Perfection in the CV!@

Imelda Guerrero

Love love love this salon. Book with Dagmara she is really efficient and leaves you looking beautiful. Good service never disappointment me been coming to Dagmara for a while and always does exactly what I ask for. Really really Recommend her service and the Salon staff are great as well so welcoming

Yesenia Castillo

Janet is very sweet and thorough with her consult. Very professional. She worked magic on my overgrown hair (It’s been a long year). Service was great. Definitely coming back for more services offered by her. Thank you Janet

Jennifer Tang

Gorgean gave a great hair cut that complimented my hair type and face shape. He was able to understand both even with the masking and social distancing in place. Very nice shampooing and relaxing atmosphere. They just relocated to a new space with good lighting and an elegant feel.

Aya Zhou

Gorgean is great! He is very knowledgeable of hair care and patient with my questions about hair styles and products.

HH Meng

Everything was wonderful! Janet is so sweet amd thoughtful. She is very attentive to my needs as a client. She shared great styling advice to help preserve my hair. I have been using the most affordable products, which have unfortunately been causing damage to my hair. She is very knowledgeable and made some great recommendations. The salon is modern and sleek, adorned with the most beautiful crystal chandelier. Absolutely beautiful! One of my favorite parts is the hair washing station. The design of the sink was comfortable and very relaxing, easy on the neck. Few things beat the way it feels to have your hair washed and styled.

Jocelynn Ahnstrom


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

Feel free to contact us

Or fill our contact form online

Store Hours

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


3036 Castro Valley Blvd,
Castro Valley, CA 94546


(510) 736-3776