Ganahl Lumber Company - Lake Forest

Diamond Rating

To earn the Showroom Diamond, the dealer must have a showroom with a minimum number of Milgard products on display.
To earn the Web-Site Diamond, the dealer must have their own Web-site with information about the Milgard products and the services they sell.
To earn the AAMA Certified Diamond, the dealers must have at least one member from each of their installation crews complete the AAMA Installation Masters training and pass the AAMA Certified Install test.
To earn the Product Knowledge Diamond, all Dealer Sales Consultants must pass a series of standardized Milgard administered tests demonstrating Milgard product knowledge.





23132 Orange Avenue
Lake Forest, CA 92630
United States

Store Hours

Monday6:00am - 6:00pm
Tuesday6:00am - 6:00pm
Wednesday6:00am - 6:00pm
Thursday6:00am - 6:00pm
Friday6:30am - 6:00pm
Saturday6:00am - 6:00pm

Services Offered

Has Showroom
MGWS Dealer
New construction
Offers installation

About Us

We're not the best because we're over 100 years old, we're over 100 years old because we're the best!

We are family and employee owned.

We strive to do the ordinary things... extraordinarily well!

Awards Received

Areas Served

Capistrano Beach, San Clemente, Laguna Niguel, Laguna Woods, Dana Point, Laguna Beach, Ladera Ranch, Aliso Viejo, Mission Viejo, Coto de Caza, San Juan Capistrano, Newport Beach, Corona Del Mar, Balboa, Irvine, Lake Forest, Foothill Ranch, Rancho Santa Margarita, Oceanside, Costa Mesa, South Orange County, Orange County, Tustin, Huntington Beach, Trabuco Canyon, El Toro

23132 Orange Avenue, Lake Forest, California, United States 92630


Ganahl Lumber Company - Lake Forest

See All Reviews
Ganahl Lumber Company - Lake Forest is rated 5.0 out of 5 by 13.
Rated 5 out of 5 by from Satisfaction I bought the Millard windows and sliding doors through Ganahl (Andrew Galvez) a year ago and we love them. The features and functionality are terrific. They remain so easy to operate and have reduced the pot side noise that we used to experience.
Date published: 2022-06-11
Rated 5 out of 5 by from Custom windows Great Product! Great service from Andrew Galvez at Ganahl Lumber. He got me exactly what I wanted with my custom built windows! Thank you
Date published: 2022-03-28
Rated 5 out of 5 by from Quality product I've been recommending and installing Milgard products for many years. Their quality, price and service are second to none.
Date published: 2022-03-11
Rated 5 out of 5 by from Great Value I purchased my Millard windows from Ganahl Lake Forest. I am very happy I did! I love them. They work well and my power bill has gone down.
Date published: 2021-04-21
Rated 5 out of 5 by from Great Service Annette was great. She really knew the product inside and out and was able to recommend adjustments to the product. I only use Ganahl lumber For windows. And yes the prices are better than Home Depot
Date published: 2021-03-22
Rated 5 out of 5 by from Great quality and help! Recently moved all my door and window needs to Ganahl. My salesman has been awesome to work with!
Date published: 2020-04-17
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