How many projects has Leighton Consulting Inc undertaken?

Leighton Consulting Inc has pulled 163.0 building permits since 1990.

Does Leighton Consulting Inc carry a valid contracting license?

Leighton Consulting Inc currently holds license 858635 (General Engineering, Contractor), which was Active when we last checked.

Leighton Consulting Inc

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Irvine

Updated: Jul 22, 2026

Leighton Consulting Engineer

Leighton Consulting Inc, 2600 Michelson Dr, Irvine, CA (Owned by: Greg Middleton) holds a General Engineering license and 1 other license according to the California license board.

Their BuildZoom score of 107 ranks in the top 6% of 336,931 California licensed contractors.

Their license was verified as active when we last checked. If you are thinking of hiring Leighton Consulting Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.

Building Permits by Leighton Consulting Inc

Sort by: Notable Notable | Date Date | Job Value Job Value

This is a sample of this contractor's permits. Click here to access their complete permit history.

Encroachment permit

8952 Milliken Ave, Rancho Cucamonga, CA, 91730

2025-04-27

Drilling and sampling 5 soil borings (maximum depth of 120 feet each) through existing asphalt east side of milliken avenue (northbound lanes) & south side of azusa court (eastbound lane) and rancho cucamonga metrolink station parking lot. temporary lane closure for street borings see boring location map for approximate locations and typical traffic control sheet. this is for the onta... see more

Valuation:

N/A

Permit #:

ROW2025-00003

Status:

issued

Fee:

$2,749

Permit Type:

N/A

Building Type:

N/A

Precise grading permit

3100 Martin, Irvine, CA, 92612

2025-07-03

**reprinted to reflect change of owner & change of contractor and to process new grading bond** precise grade for quinn von karman apartments & parking garage. tract 17666. lot 1. 9.29.23 approved/issued revision 10 changed name from milani apts to quinn apts. project address changed from 18831 von karman to 3100 martin. mm.reprinted to reflect change from contractor(a&r corp) to owne... see more

Valuation:

N/A

Permit #:

00930649-GP

Status:

final

Fee:

N/A

Permit Type:

N/A

Building Type:

N/A

Misc permit - addition/alteration

1 Hoag Dr, Newport Beach, CA, 92663

2025-08-19

Commercial - excavate & install temp shoring to remove (6) existing 1550 gal grease interceptors

Valuation:

N/A

Permit #:

U2025-0576

Status:

issued

Fee:

$5,005

Permit Type:

N/A

Building Type:

N/A

Grading - commercial/industrial

1901 Via Burton St, Fullerton, CA, 92831

2023-02-02

Precise grading permit. new 139, 269 sf concrete tilt-up industrial building shell and associated site improvements consisting of new parking landscaping site lighting utilities. commercial. retaining wall required

Valuation:

N/A

Permit #:

GRA-2021-0025

Status:

expired

Fee:

$2,355

Permit Type:

N/A

Building Type:

N/A

Misc. const. eng permit

1 Grid, Irvine, CA

2024-04-16

Location: jamboree from barranca tocampus drilling sixteen hollow-stem auger borings 8-inch diameter borings along jamboree road from barranca parkway to campus drive. the borings will be drilled to depths of 5 to 10 feet. the borings will be backfilled with native soil cuttings and existing asphalt concrete surfaces will be restored with cold patch asphalt and/or quickset concrete wi... see more

Valuation:

N/A

Permit #:

00916084-MCE

Status:

issued

Fee:

N/A

Permit Type:

N/A

Building Type:

N/A

Construction utilities permit

Milliken, Rancho Cucamonga, CA, 91739

2022-11-08

4 geotechnical borings. boring 1 is in the metrolink parking lot (330 feet northwest of azusa court) boring 2 is on east side of miliken ave (370 feet south of 7th street) boring 3 is on east side of miliken ave (210 feet north of 5th street) boring 4 is on east side of miliken ave (470 feet north of 4th street)

Valuation:

N/A

Permit #:

ROW2022-00347

Status:

complete

Fee:

$1,195

Permit Type:

N/A

Building Type:

N/A

Precise grading permit

16200 Sand Canyon Ave, Irvine, CA, 92618

2024-04-10

(e-plan) precise grading & infrastructure hoag phase 1b for realignment of campus roadways, new hardscape and softscape areas and new utilities

Valuation:

N/A

Permit #:

00893429-GP

Status:

issued

Fee:

$11,185

Permit Type:

N/A

Building Type:

N/A

Precise grading permit

1 Grid Hh43, Irvine, CA, 99999

2021-07-13

(e-plan) loc: alton/hoag irvine. precise grade surface/revise parking lot to create 179 new spaces. surface parking total = 454 spaces when done. vehicle entrance added at hoag irvine crossing & existing bike & pedestrian trail. *epr*

Valuation:

N/A

Permit #:

00831019-GP

Status:

final

Fee:

N/A

Permit Type:

N/A

Building Type:

N/A

Manufactured new

400 W Central Ave, Brea, CA, 92821

2019-12-18

Residential see accela: bld-2020-00131 - construct new 20-plex dwelling unit building. (units 101-104 201-206 301-310) 42, 980 sq ft living 10, 066 sq ft garages

Valuation:

$4,197,571

Permit #:

B19-000-875

Status:

issued

Fee:

$149,285

Permit Type:

R-2 residence mf

Building Type:

N/A

Encroachment permit (enc) - enc01 - encroachment permit extensive

66 Th Ave, Riverside County, CA

2024-07-31

Excavate drill log & sample 8-8:inch borings along 66th ave between harrison street and polk street - thermal

Valuation:

N/A

Permit #:

ENC24041201

Status:

filed

Fee:

N/A

Permit Type:

N/A

Building Type:

N/A

Precise grading permit

16200 Sand Canyon Ave, Irvine, CA, 92618

2024-06-05

(e-plan) precise grade & infrastructure phase 1c for realignment of campus roadways & main hospital drop-off areas

Valuation:

N/A

Permit #:

00869877-GP

Status:

issued

Fee:

$5,865

Permit Type:

N/A

Building Type:

N/A

Rough grade/stockpile/tank permit

16200 Sand Canyon Ave, Irvine, CA, 92618

2021-07-19

(eplan) demolish & rough grading work for a future roadway at the south-east corner of the campus for hoag memorial

Valuation:

N/A

Permit #:

00834110-RG

Status:

final

Fee:

$1,190

Permit Type:

N/A

Building Type:

N/A

Construction change - eng

715 15th St, San Diego, CA, 92101

2019-09-18

Construction change b to project 529512 approval 1861531 for engineering drawing 39915-d. updated from bio filtration to fronterra adding new gas service along g street. sheets revised 6 new sheets 11 and 12

Valuation:

N/A

Permit #:

2302030

Status:

issued

Fee:

$2,364

Permit Type:

N/A

Building Type:

N/A

Ld - utilities

<placeholder>, Temecula, CA, 91362

2019-03-12

Leighton consulting to drill & sample (10) geotechnical borings location: temecula parkway (w/b) b/n bedford court and rancho pueblo road (number 2 lane - borings to 20 in depth) pothole locations per attached kennedy/jenks plan - rcwd - temecula parkway recycled water pipeline replacement (project no. d1881) traffic control shall be in accordance with attached two caltrans standards ... see more

Valuation:

N/A

Permit #:

LD18-2036

Status:

issued

Fee:

N/A

Permit Type:

Excavation - para...

Building Type:

N/A

Precise grading permit

1 Grid Xx37, Irvine, CA, 99999

2018-05-31

Location: alton/barranca precise grade for buildings 1 & 7 @ ocpc campus. lots 1 & 2 tract 17783

Valuation:

N/A

Permit #:

00638588-GP

Status:

final

Fee:

$665,544

Permit Type:

N/A

Building Type:

N/A

Precise grading permit

1 Grid Xx37, Irvine, CA, 99999

2018-07-24

Location: alton/barranca precise grade for broadcom campus headquarters

Valuation:

N/A

Permit #:

00644937-GP

Status:

final

Fee:

$1,320,544

Permit Type:

N/A

Building Type:

N/A

Combination building permit

6737 Winding Creek Dr, San Diego, CA, 92119

2019-07-27

Navajo. combination permit for new retaining wall per city of san diego bulletin # 221 & # 222 for a sdu. rs-1-7 fire brush management geo haz 23 24 overlays

Valuation:

$14,352

Permit #:

2284763

Status:

complete

Fee:

$1,156

Permit Type:

Acc struct to 1 o...

Building Type:

N/A

Rough grade/stockpile/tank permit

15800 Laguna Canyon Rd, Irvine, CA, 92618

2025-04-03

(eplan) preliminary grading for warehouse expansion

Valuation:

N/A

Permit #:

00933732-RG

Status:

final

Fee:

$11,933

Permit Type:

N/A

Building Type:

N/A

Precise grading permit

16200 Sand Canyon Ave, Irvine, CA, 92618

2023-05-27

(e-plan) precise grading for commercial building

Valuation:

N/A

Permit #:

00889815-GP

Status:

issued

Fee:

$1,440

Permit Type:

N/A

Building Type:

N/A

Encroachment permit

1 Grid Tt36, Irvine, CA, 99999

2022-07-26

Location: metrolink station parking lot--(4) 8 diameter borings for geological evaluation. standard cond apply. traffic control per watch. 1 day job

Valuation:

N/A

Permit #:

00876184-EP

Status:

final

Fee:

$322

Permit Type:

N/A

Building Type:

N/A

Recent Buildzoom Projects

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Verified License

License #	858635
Status	Active
State	California
Type	General Engineering
Business Type	Corporation

BuildZoom verified this license was active as of July 2026.

Verify this license's status for Leighton Consulting Inc at the California Contractors State License Board.

This is a sample of licensing data; click here to access a complete history.

Inactive License

License #	858635
Status	Inactive
City	Oceanside
Type	Contractor
Business Type	Corporation

According to the City of Oceanside, CA, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.

Check this license's status for Leighton Consulting Inc at the City of Oceanside, CA.

This is a sample of licensing data; click here to access a complete history.

107

BuildZoom Score

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Bonded

Bonded Agent	Western Surety Company
Bond Value	$15,000

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Insured

Workers Comp Provider

Starstone National Insurance Company

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163

Permits

Building permit records show that Leighton Consulting Inc has worked on 163 permitted projects.

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Leighton Consulting

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Leighton Consulting Engineer