I've worked with this company for the past year. I was referred to them by a previous client and…read morewas very happy to work with a company who is great at their job, charges a fair price and delivers what they promise. They are very good as explaining their complex engineering world to a simpleton like me!!

From the owner: Civil Engineering | Land Surveying | Construction Staking | Geotechnical Engineering | Construction…read moreMaterials Testing | Construction Inspection | Construction Management | Soils Investigations | Soils Compaction Testing | Percolation Testing | Infiltration Testing | Concrete Testing | Masonry Inspection | Welding Inspection | Asphalt Paving Inspection | Laboratory Testing | Sub-Division | Grading Plans | Feasibility Studies | Storm Water Pollution Prevention Plan | QSD / QSP | Hydrology Studies | Boundary Surveys | ALTA Surveys | Easements | Topographic Surveys | GPS Surveys | Cadastral Mapping | GIS | Aerial Drone Topography | Contract Management | Project Management | Estimating | Budget Analysis | Site Operations | Site Supervision | Strategic Planning | Cost Control

What a great company been doing business with Challman engineering since 2007 bill Challman in…read morestaff is always professional engineering plans are always done in timely manner when in doubt use challman engineering they will get the job no engineering company does it better

Challman Engineering is the very best when it comes to customer service…read more They really know their stuff. I can always count on their amazing staff to handle anything from a routine RFI all the way to a complete set of professional plans. Thank you Bill for always taking the time to explain things to me in a Windows-for-dummies version, lol. - You guys Rock !!

Emad Makar did a Soil Analysis and Engineering report so that we could replace a retaining wall…read more His fee was reasonable and he quickly worked on the project at our property. He set expectations on when he could deliver the report and met the timeline. It is a detailed report that will be used by LA County to authorize a permit. We are happy with the quality and timeliness of the services provided. We appreciate Emad's effort and the quality of the report. We will use his services again if we have projects in the future

Emad came out to inspect a property we are in the process of buying. He did a thorough inspection…read moreand sent me a report the next day! He was very detail oriented and great with communication. Super friendly and would recommend for any engineering tasks you need done!

This is the most frustrating company to work with if you are a property owner building an ADU…read more If you are looking for a company that moves quickly - move on If you are looking for a company that responds to you in a timely manner- move on If you are someone who values your time and does not like to consistently repeat your needs, even though you emailed the details - move on If you do not mind consistently correcting an engineer, who is supposed to be a professional and read your emails - move on I wanted to hold off from sharing this review because still waiting on this company to give me the plans I paid for. But this place is so careless in terms of service that I wouldn't want another person trying to build an ADU to fall victim to this place. Just move on.

I've been working with Stewart design for 3 years and I can say I highly recommend them for their…read morequality and professionalism They've done more than 20 projects with my husband and I and I've never had any inconvenient with any project what so ever Christine & Carl is the sweetest I think the biggest thing about working with a business such as design and engineering is the type of professionalism they have to us that's a huge thing. Thank you Carl and christine

Courteous, friendly and fast. They were a great help when we needed a test fast…read more They actually answer phones and call back when they say they will.

From the owner: Civil Engineering | Land Surveying | Construction Staking | Geotechnical Engineering | Construction…read moreMaterials Testing | Construction Inspection | Construction Management | Soils Investigations | Soils Compaction Testing | Percolation Testing | Infiltration Testing | Concrete Testing | Masonry Inspection | Welding Inspection | Asphalt Paving Inspection | Laboratory Testing | Sub-Division | Grading Plans | Feasibility Studies | Storm Water Pollution Prevention Plan | QSD / QSP | Hydrology Studies | Boundary Surveys | ALTA Surveys | Easements | Topographic Surveys | GPS Surveys | Cadastral Mapping | GIS | Aerial Drone Topography | Contract Management | Project Management | Estimating | Budget Analysis | Site Operations | Site Supervision | Strategic Planning | Cost Control

We had multiple structural issues with our driveway gate that was poorly installed by a licensed…read morecontractor. We hired Evgeny to provide his expert engineering advice. He was not only highly professional but extremely helpful in guiding us how to resolve the issue. He even included a CAD design for us to present to the contractor for a reasonable price. We highly recommend Evgeny and would hire him again for engineering needs.

My husband and I are very happy that we turned to Evgeny. He proved to be very professional and…read morepunctual. He came and inspected our roof, as we were planning to install solar panels with Tesla. However, Tesla refused to provide a 100% offset and only offered 66%, claiming that there were issues with our roof. So we started looking for an engineer who could assess the real condition of the roof. Evgeny arrived right on time and did a thorough inspection. All the paperwork was ready the very next day. We 100% recommend him!

I'm currently in the beginning stages of my ADU project, and so far, working with Min Kang at Uni…read moreConstruction has been a great experience. Communication has been clear and consistent, and they've been very patient in making adjustments to the design based on my feedback. I'll update my review once everything is complete, but for now, I can confidently say it's been a very positive experience!

Min and his team at Uni were exceptional from start to finish. Before we even committed, Min took…read morethe time to understand our needs and was the only one to suggest a Zoom call to align on the project scope and share practical tips for navigating the permit process for our as-built patio. Their expertise, competitive pricing, and impressively fast response time made the entire experience smooth and stress-free. Professional, personable, and reliable -- we highly recommend them to anyone in need of architectural or structural drawings.