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Services - Quad Knopf

Landscape design

Structural engineering project consultation

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8 years ago

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The Dirt Guys

The Dirt Guys

(3 reviews)

Great company always professional and does good work and gets it to you fast. No issues at all abs…read moreused on several occasions.

I found Karl through the Inspectapedia website and asked him to design a septic system for my…read moreproperty. The first step to getting approval from the county is conducting a soil profile and perc test which I asked Karl to do. I can't say enough good things about the guy. There was no way to get an excavator to the lot so he dug the trenches and holes by hand. Karl is not only hardworking, he is also very knowledgeable, he pointed out where my neighbor had destabilized the slope by under cutting the land under my lot. (2 other engineers hadn't said anything about it). Karl is also extremely honest; even though he it meant wouldn't get the fee for designing the system, Karl told me I should trench the 300' to connect to the main sewer line even if it cost more than a septic system. One other thing that made an impression on me was Karl's very calm personality. The county inspector was being unreasonable which was really irritating me and I felt that a major argument was about to erupt when Karl stepped in and calmed things down by telling the inspector he'd do whatever the inspector needed and that he was in charge etc.. I was amazed how well it worked so much so that the inspector was being friendly by the time he left. Yelp doesn't have a category for civil engineers so I listed him under structural engineers. But he is actually a civil engineer that specializes in soil issues and testing ie septic systems, foundation, slope failure etc...

Bowman & Williams - Our new location, as of December 2017!

Bowman & Williams

(2 reviews)

The technical team at Bowman and Williams rescued us from a natural disaster in 2024. A landslide…read morehad devastated part of our hillside and we needed an emergency grading permit to stabilize things before the rainy season. These guys knew what they were doing to save the day and get through all the red tape that County regulators could muster. Professional, punctual, and courteous, I would recommend Ben and his team anytime.

After the 2017-2018 winter storms that resulted in Santa Cruz County California being declared a…read morenational disaster our two-mile county service road providing access to 67 residents suffered several $M in damage as mountains collapsed onto the road and several locations when the road collapsed down the mountain. The county retained Bowman & Williams (B&W) to do preliminary damage evaluations in the disaster area. We were required to obtain 3 quotes to qualify for state and federal disaster relief. B&W offered the required survey and construction design services and always came in with a competitive price. As work actually got underway an alphabet soup of regulatory agencies, FEMA, CA OES, WRCB, F&W, made various demands that impacted the design and B&W always responded quickly to keep the projects on schedule. With all the regulatory hurdles, permits, construction bids and county construction requirements it took until FY 2024-2025 to complete the last project and Bowman & Williams stuck with us thru the last bit of paving and the last guardrail.

3Dscapes

3Dscapes

(7 reviews)

After calling around several contractors I decided to give Mike the opportunity. Not only was he…read morepolite over the phone, he was sharp. I could tell he knew what he was doing. So right outta the gate I had a great first impression. After an appointment over the phone mike showed up to physically take a look at my garbage back yard. I was embarrassed cuz I had already tried to take a run at the job but failed. But AGAIN mike was polite and didn't make me feel bad about the job that I'm sure I did wrong. His bid was a bit higher then his competition, but in my experience you get what you pay for. I went with his quote and my wife and I did not regret it. He got the job done as promised and he stuck to his time line too! Over all I'm Very impressed. Mike and his team were worth ever cent! If your looking to have your yard remodeled correctly (the first time) call 3D scapes! Beautiful work guys !

Mike with 3d Scapes is one of a kind ! While most contractors are not prompt or follow through with…read moredeadlines, Mike takes his work very seriously and always delivered as he said he would . Admittedly his prices may be on the higher end compared to his competitors. However, I have always felt that you get what you pay for. And after having a very positive experience I would say that working with them compared to other contractors is like having a gourmet meal as opposed to fast-food . You're not gonna complain if you spend a little more as long as you walk away satisfied. For your landscaping needs I would recommend treating yourself to work with 3D scapes. You won't regret it !

Quad Knopf - structuralengineers - Updated May 2026

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