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Approved
Approved

JOHN MOUNTAIN

5.0(
7
)
Excavation Major Grading or Resloping, Septic System - Install or Replace, Septic System Repair,

About us

Mountain General Engineering LLC is a full-service underground contractor specializing in excavation, grading, concrete, and utility installation. We provide water services, sewer laterals, storm drain systems, retaining walls, paving, and both wet and dry utilities. Our team delivers reliable, high-quality work with a focus on safety, efficiency, and long-lasting results. From small residential projects to larger site work, we take pride in getting the job done right the first time.

Business highlights

5 years of experience

Amenities

Free Estimates

Yes

Reviews
5.07 Reviews
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Number of StarsImage of DistributionNumber of Ratings
5
100%
4
0%
3
0%
2
0%
1
0%
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Showing 1-7 of 7 reviews
Al G.
Jun 2026
5.0
Sewer Main Install, Replace or Repair
$750
John contacted me right away and gave us transparent pricing. The 2-person team showed up on time and completed the lateral sewer line repair in an efficient and professional manner. I would definitely work with them again.
Sam Z.
Jul 2025
5.0
Retaining Wall - Install
These are the consummate professionals that you want doing your project. Excellent communication from start to finish. Their work is immaculate. Their attitudes are friendly and helpful. On time every day. Cleaned up after. No drama whatsoever. I would hire these guys again in a minute.
Kip B.
Oct 2024
5.0
Sewer Main Install, Replace or Repair
$2,242
These guys did a great job, they worked efficiently and did top quality work.
Kip B.
Aug 2024
5.0
Sewer Main Install, Replace or Repair
Yes, I recommend this pro
$2,242
This is a great company. They know what they're doing and they do it for a good price. Staff was all very friendly and worked quickly and efficiently and cleaned up everything when they finished. I would hire them again.
Robin P.
Jan 2024
5.0
Yes, I recommend this pro
$3,600
John was very helpful and professional. His crew was polite and experienced. He fixed our drainage/ leakage problem completely. We were very happy with his work.
Cathy S.
Oct 2023
5.0
Retaining Wall - Install
Yes, I recommend this pro
I cannot say enough about how good this experience with John Mountain/Mountain Engineering has been. They said it would be 3 weeks; anti was. The work was painstakingly done, including a French drain behind the wall. And they replaced the plants that were destroyed during the process, which was an unexpected bonus.
Alex K.
Apr 2023
5.0
Septic System - Install or Replace
Yes, I recommend this pro
John Mountain was very helpful, and thorough. He kept me well-informed every step of the way!

Licensing

Licensed*

Trade License Number

1080909

Trade License Locale

CA

Trade License Expiration

05/31/2027

State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our Find Licensing Requirements page.

*Contact business to see additional licenses.

FAQ

JOHN MOUNTAIN is currently rated 5.0 overall out of 5.

Yes, JOHN MOUNTAIN offers free project estimates.

No, JOHN MOUNTAIN does not offer eco-friendly accreditations.

No, JOHN MOUNTAIN does not offer emergency services.

No, JOHN MOUNTAIN does not offer warranties.