Diamond K Supply is a well run landscape and materials supplier for your home projects and beyond. I recently purchased some rocks here to finish a backyard project. They had several contractors there, so they take care of your small or big project needs. I called them up to see if they had the rock blend we needed, which they did at a reasonable price. The service counter employee was helpful, and offered to sell me two cubic feet split into four bags. They said that one bag would weigh about 50 lbs., so splitting it up into four bags would make it easier to lift. I paid, and it only took about 10 minutes for them to make the bags and bring them over in a forklift to load up the car. Their staff is very friendly, and the store is clean and well stocked. I will be back for future outdoor projects. read more

Diamond K Supply - Building Supplies Near Me - Lafayette, California

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I ordered gravel to fill an area for drainage, intentionally buying extra to account for compaction with a hand tamper. However, as I filled the space, I realized I was running out of gravel and ultimately didn't have enough. After calling Diamond K and providing my measurements, they confirmed my order and calculation were correct but didn't offer a solution. I was told the manager would call me back, but he never did, and my follow-up message received no response. My project is now on hold, which is frustrating. I'll consider other landscape supply companies in the future. read more

Friendly, informative, and always deliver what I expect. Been coming back for years to get materials. For the types of projects I've been working on, they've had most of what I've needed/expected to find here. read more

I ordered 2 pallets of moss rock--with delivery to a small private lane. The poor driver had to back up the big flatbed truck with the forklift attached at the back--down the lane. Then Efron, the forklift operator, skillfully maneuvered the forklift to place the pallets (side by side within inches of each other) into a tight spot, while navigating around a mailbox and a parked car. They were very pleasant and accommodating. Kudos to both for a job well done! read more

Great family business . Fantastic customer service competitive prices and plenty of options .

Diamond K is simply a gem of Lafayette. My family relocated and purchased a house in the area and needed supplies for doing DIY landscaping projects. The entire staff was very helpful and provided answers to all my questions. They great customer service, reasonable prices, friendly staff, great selections and affordable delivery. read more

This place is the best. Show me another business anywhere near here that has stayed continuously open in the same location and in the same building since 1936. They must be doing something right. My great grandfather Joe Machado was a regular customer back then to buy all that he needed for his big dairy ranch in the Silver Springs valley. Likewise, while a landscape contractor from 1990-2010 I used Diamond religiously. What a resource to have in the middle of this once flatbed farm truck town turned upscale chic Lexus country. It should be declared a historic landmark. Diamond K is the one place in town left you can experience a little bit of dust and buy some real goods to do real work. Turn your computer off, go down there, roll up your sleeves, buy something to make your physical world better, and get to work. And lastly, celebrate the dust. It's good for you. read more

They are cheating on the weight of material , it's not first time they have been caught, I've made mistake trusted again. Instead of 75 pounds ( what they saying you on the phone ) they selling you "50 " pounds, I was asking them to put on weight scale , but employe said he has not time and when I insisted, he said "get out of here " Another time instead of gator sand they sold regular sand . Another time they cheated on the topsoil. They super unfriendly , rude and don't care about customers. read more

My go to place for all of my landscaping projects at home in Orinda. Great customer service and convenient to schedule deliveries.

Excellent customer service by their entire staff. Super knowledgeable. The hardscape inventory is awesome! read more

Diamond K Supply - Moss rocks for hardscape designing - Building Supplies Near Me - Lafayette, California

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I ended up going with DiamondK after going to another local rock place and DiamondK. Their price is slightly better and delivery was much cheaper. Kevin was super helpful and friendly. I called and went in a couple times and got a lot of my questions answered. This place has a nice little store with supplies and bagged rocks that are easy to just pick up. I can't believe this place is located in downtown Lafayette read more

Don't know why there is so much whining from the consumers on this one. This isn't a Home Depot, it's a commercial oriented, not consumer oriented business. They sell to contractors mostly, so those kinds of businesses are always a different kind of consumer experience. My dad owned an HVAC business,selling equipment, for many years, and so I get it. That being said, if you want rocks and tiles that you can't find at a big box store, and you want large or small quantities, this place is really good. I have bought a ton of drain rock from them int the past as well. Great shop. read more

Super responsive and immediate appointments to drop off firewood, topsoil etc. Good rates and friendly drivers who are super accommodating.

With the drought looming....I returned to Diamond K for more landscape materials. The Diamond K staff AGAIN knew exactly what materials I should use, the quantity, and the rock material was delivered on time. The Lafayette area is so lucky to have this business in their town! read more

I feel so lucky to have Diamond K near me. I have been a customer for nearly 20 years. They promptly deliver black mulch and top soil to my driveway every year. The guys are very knowledgeable and have also helped me with irrigation and drainage questions and I have been able to do my own repairs because of that. They have a good selection of products and they will deliver for a reasonable price. The store is geared toward professionals, but they will also help DIY homeowners. read more

Extremely well stocked with beautiful landscaping materials. Staff is super friendly, helpful and knowledgeable. read more

Professional. I have ordered twice so far. We have a steep driveway and their driver did an amazing job getting into our driveway, asked where we wanted them to place the gravel, and was just a nice person. I also appreciate them answering my questions. Prices were fair and customer service was good. Thank you! read more

Staff is very nice and helpful. I come here frequently for gardening supplies. Highly recommend them.

I'm a professional landscaper and have been going here for years. I'd gotten used to the borderline-surly, indifferent attitudes among counter and yard employees here. But a recent experience went wrong in so many ways, it made me decide to never patronize this business again. What happened? Yard attendant is busy, but says I'm next. I'm fine with that. I wander around the stone selection, trying to keep him in sight. He disappears. His loader shuts down, then I hear him BSing with a couple people at the bottom of the yard. 10 minutes later he comes back. Takes my order, says he'll get started on it, tells me to go inside and pay. I do, giving the register guy the same slip of paper I showed the yard attendant. I come back out and the yard guy is nowhere to be found. After I stand there for five minutes, another guy asks if he can help. I show him my receipt. He says "I don't think he started on this. He's over there helping another customer. I'll get on it." By now I've been here over a half hour. Other people have come in, loaded up, paid, and left. 10 minutes later he comes back with about half what I ordered. I ask him about the missing stuff. "That wasn't on the receipt." We go back into the office. "Oh, we're out of that, I didn't charge you," says the guy at the counter. It's now been almost 45 minutes, and I'm finally told the key item I came in for, and asked for nearly 45 minutes ago, isn't in stock. Inattentive customer service, lousy communication, wasted time. I'd really rather not drive out to Richmond (American Soil) or Concord (Mt Diablo Landscape), but after this experience, it's no contest. The extra driving time is worth it for the professionalism, selection, and customer service. None of which you will find at Diamond K. This experience was like watching the Keystone Cops try to manage a game of Twenty Questions. read more

Kevin and Courtney have been so helpful providing advice on product and excellent customer service. Diamond K always has the material we need and can deliver quickly. Diamond K is a great local resource for our large suburban- rural lots where we always need something! read more

Ridiculously expensive and probably one of the least customer services focused group of crotchety guys you could imagine. Attitude seems to be the customer should be honored to buy from them...oh ya, and apparently there ARE dumb questions. Prices are often 2x than anyone else. Try Ecomulch out in Martinez. $50 delivery to most anywhere and super friendly. Pricing is also much friendlier. read more

They sold me "compost" that was actually such fresh manure that it was still full of turds. It burned my new plantings and I had had to flood the large area with water to try and save them. My neighbor had the same experience. read more

As someone who has lived in Lafayette for over a quarter of a century, I've become very disappointed in Diamond K. Between high rates, inconsistent inventory and some of the most arrogant sales people, it's become a place to avoid. This is particularly sad because it used to be a mainstay for me. The breaking point came when someone doing work for me purchased soil from them instead of my usual supplier. He paid top dollar for something that turned into concrete and took 3 years to remedy in my organic food garden. If you are serious about yard materials, it is probably best to find another supplier. read more

I've done a lot of business with Diamond K Supply over the last 15 years and for the most part they have been fine. Not great, but fine. Today I went in to Diamond K at 3:00 (they close at 3:30) and I asked for three bags of decomposed granite and was chastised by the man at the counter - stating that they don't fill bags after 2:00. He then said in this case he'd make an exception, but next time either come in earlier or call in my order ahead of time. I didn't say anything other thank you, and got the feeling that he was doing me a favor. I think in the future I'll take my business elsewhere. Morgan's Masonary in San Ramon is a longer drive, but have much better hours, and much nicer staff. read more

I've been going to Diamond K for years. I will not do business with them ever again. They are rude, terrible management, way over priced, and have a terrible selection of rock. The customer service sucks, nobody seems happy to be there or help. Since they re opened, they are very short staffed. Not worth supporting a local business that doesn't do business well at all. read more

Diamond K IS NOT the place to get top quality top soil! For General landscaping soil it's ok, but if you want the creme de la creme, got to American Soil in Richmond and they also deliver. Their Local Hero Garden Blend is the best I've ever seen for organic gardening. Otherwise - Diamond K is ok for other products and the counter staff are friendly and the yard staff are on the ball. read more

I needed an alternative landscape materials supplier as the one I reviewed from San Ramon is not an option (see review below). These guys greeted me with a smile, gave me free bags of samples to take back home to test in my designs, and delivered 10+ yards of material at a very fair price. The quality is very good and I will come back for more in the future. Other people complain about their top soil quality, but everything else is GREAT! read more

I like to review my projects when complete to see what was good and what we could do better next time. This last project Diamond K was definitely the low point! We typically don't use these guys unless we have to (my expectations are already low from experience). However we needed to use them on the last project unexpectedly. 1. They don't know their business very well. I called and the person who answered didn't even know some very basic terms. "Is that the same as this???" 2. Scheduling was interesting. They needed to re-schedule. And still didn't show up during the designated time. 3. Delivery was made to the wrong place we requested. The driver showed up and dumped in about 30 seconds before we could even tell him not to. 4 the driver was totally RUDE! We told him that he dropped in the wrong place. "I DON'T HAVE TIME TO TALK TO YOU". 5. The product was a joke. Filled with debris from two other loads. Didn't bother to clean the truck out. We spent a lot of time just cleaning They are terrible! read more

Contrary to some of the older postings, I've had two very good experiences with Diamond K in the past two weeks. I suspect the negative narratives from the previous reviews must have prompted a major overhaul, because everyone I encountered went out of their way to answer my questions and load my car promptly with a very friendly send-off. read more

Need to give kudos to the driver who delivered 2 cubic yards of mulch. He expertly squeezed his truck between a postbox on the corner of my driveway and an overhead telephone wire and dropped the mulch right on the button in the middle of a tarp spread out on the driveway. read more

My landscape architect mentioned this place. I tried contacting them with some questions about their products. They never got back to me. Doesn't seem like customer service is important to them (see the other yelp reviews) read more

After going to two other local landscaping supply stores to choose stones for a garden path, we chose Diamond K because they were the most helpful (not greatly helpful, but much better than the other two stores we visited who would probably not help you if you were bleeding to death), and the shop is set up to help shoppers easily choose what they need. Other "rock yards" had nothing on display and expected you to dodge forklifts and tiptoe around jagged chicken wire to look at the materials. Diamond K quoted us a price lower than the other stores for the stepping stones we wanted. We were thrilled and eagerly chose and loaded a ton (that's 2000 lbs!) of stones onto a pallet. The next day we came back to finish our order and we re told that the price we were quoted was wrong! Our rocks ended up being 300-400.00 more than we thought. We could have walked away, gone to the other rock yard, tripped over chicken wire, and loaded ANOTHER 2000 lbs of rock and saved 300.00 but it wasn't worth it. Diamond K did give us free delivery as a result of this error, so that felt a little better. In the end, they sold us quite a bit too much, (which we could return, but do we want to load it up again it just use the stones elsewhere in our yard?). However, we are very happy our garden path and the quality of the materials we got at diamond , but double check the prices they quote you before you load stuff and know they will overestimate by a lot so you will overbuy. read more

I had some top soil delivered for a vegetable garden, and was very disappointed in the soil. I was told it was 30% compost, but it drains poorly and the vegetables aren't growing that well. I spoke with a local nursery that told me they also heard complaints about Diamond K's top soil. I've just amended the soil with fir bark and compost, so hopefully that will improve it If you use Diamond K, stick with their gravel and rocks. read more

--------- if you want to know what's going on with your order, don't bother with dk . the manager promises to keep you informed and delivers zero. if somebody mentioned high prices, be sure to check with home depot - for half their price . . . read more

Great Variety!! Good service. you can simply walk the yard and see everything outdoor as well. read more

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Been shopping at this place for years and years. They've got a short guy with the gray goatee working there that must have taken specialty classes in how to be rude and unhelpful to customers. They don't allow customers to use the old bathroom which seems completely ridiculous. And to top it off their prices are not just a little bit above but way above everyone else. A big disappointment from this Lafayette institution read more

Called ahead at 455p to make sure they sold work gloves. They told me they closed at 5 so I told them I'd be there but drove up at 501p. Seconds late. Door locked would not answer knock. Would not answer phone. I find it bad form to not wait 1 minute when someone calls ahead to say they will be there. So much for local personal service read more

Customer service is good and the guys in the yard are great but the prices are high. We were quoted 52 bucks a cubic yard for cedar mulch--same product at American Soil is $36. Ouch! read more

My wife and I needed some semi-special aggregates for concrete countertops we were making. The big-name Oakland/San Leandro places either didn't have what we wanted, or treated my wife (who has done significant concrete and terrazo public art) like an idiot. Diamond K had what we wanted, knew and understood what they had in stock (which seems to be rare), and were helpful and pleasant to deal with. Overall a very pleasant and easy experience. Prices seemed generally reasonable. read more

Very friendly helpful staff. Always put forth an effort to make their customers happy. Way better than the divas over Morgans Masonry in San Ramon. They treat the customer with RESPECT read more