Brothers 440Home Improvement Supplies in Grass Valley and Colfax, CA

Since 1921, Hills Flat Lumber Co. has been supplying the community with lumber & building materials for new home construction and home remodeling projects. In the 1950s, the business expanded to include hardware, building materials, and rentals to meet all of your home improvement needs. We offer a comprehensive selection of home improvement and recreational products.

Home Improvement

Remodeling projects are a great investment for any homeowner. Improving the look and functionality of your home makes life more enjoyable for you, and it increases the value of your property. We offer a huge variety of home improvement supplies, including building materials and paint, nursery items, appliances, plumbing and electrical supplies and outdoor decking. Our door and window experts can help you find just the right solution for your home project.


Hills Flat Lumber Co. carries a full line of power tools, outdoor power tools power tools, hand tools and accessories. And our Rental Department has all the tools you need available 7 days a week.

Building Supplies

Whether you’re a general contractor or a do-it-yourself’er, we can supply you with the hardware, lumber, roofing, and siding and trim that you need for your next project.

Outdoor Living

No home is complete without a great outdoor living space, which is why we offer a great selection of outdoor living furniture plus BBQ grills and accessories. We also carry recreation products, including stand-up paddle boards, kayaks, fishing tackle and supplies, mining equipment, and Carhartt clothing for all your adventures outside of your home.

Hills Flat Lumber Co. can equip you with everything you need for your next home improvement project, as well as gear for the outdoor enthusiast. Visit us today or shop our store online!

Popular Departments


Price Match Guarantee

If you find a lower price from a store front retailer within a 50 mile radius on a new identical branded item, just show us the lower price when you buy the item at Hills Flat Lumber and we will match the price. Or, if you find a lower price within 10 days of your Hills Flat Lumber purchase, we will give you the difference. See our full Price Match Guarantee for exceptions.

BRcard 158Join. Earn. Save!

Ask about our Hills Flat Lumber Best Rewards program to receive rebates, money-saving coupons, and access to members only promotions. The Best Rewards Program lets you earn points on eligible purchases and to redeem points for Reward Coupons.