Updated: Jun 16, 2026
Location and Projects
Address
20907 W BRENTWOOD COURT, Plainfield, IL, 60544
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Diamond Mechanical, Inc
Diamond Mechanical, Inc at 20907 W BRENTWOOD COURT, Plainfield, IL 60544, held a HVAC/Mechanical Contractor license (#BC17532) with the City of Chicago contractors license board with an expiration date of 07-06-2022. We last verified the license was expired on 06-15-2026.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 65,686 Illinois contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our bidding system to be easily matched to qualified, licensed professionals in your area.
Diamond Mechanical, Inc Contact Information
Phone Number: (847) 845-7819
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Address: 20907 W BRENTWOOD COURT, Plainfield, IL 60544
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Building Permits by Diamond Mechanical, Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Interior and exterior alterations of existing single family residence work to include new mechanical system new bathroom in basement removal of walls on first floor installation of new post and beam structure new plumbing fixtures new electrical fixture per plans **certified plans corrections: conditional permit subject to field inspections **
Valuation:
$25,000
Permit #:
100943782
Status:
expired
Fee:
$1,250
Permit Type:
N/A
Building Type:
N/A
Self cert -2019 a2 multi unit dwelling a2 multi unit dwellingself-cert no change of occupancy no change of occupancy numbersinterior renovation of 2 dwelling units masonry building withnew kitchen and baths new mechanical. electrical and plumbing
Valuation:
$120,000
Permit #:
100901186
Status:
expired
Fee:
$580
Permit Type:
N/A
Building Type:
N/A
Interior alterations and remodeling of an existing basementincluding lowering basement concrete floor to an existing brick 2story single family house with attic and basement as per plans
Valuation:
$50,000
Permit #:
100949523
Status:
expired
Fee:
$702
Permit Type:
N/A
Building Type:
N/A
Rt-4 - spr 2019 cbcinterior/exterior renovation to an exist. 2-story multi-family 2 unit frame residence w. basement. new mechanical electrical and plumbing
Valuation:
$90,000
Permit #:
100933992
Status:
expired
Fee:
$1,008
Permit Type:
N/A
Building Type:
N/A
Plumbing code violations - all underground piping must be of cast iron pipe....all d<w<v and water pipe repair or replacement inside dwelling up to 5ft outside exterior foundation.....no water heater or fixture replacement on this permit
Valuation:
$700
Permit #:
100941431
Status:
issued
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
Interior renovation to an exist. 1.5 story single family frame residence w. basement.new mechanical electrical and plumbing
Valuation:
$70,000
Permit #:
100945401
Status:
suspended
Fee:
$1,445
Permit Type:
N/A
Building Type:
N/A
Interior renovations to existing two (2) four (4) dwelling unit masonry building; work to include new cabinets lights fixtures plumbing and new windows; mep as per plans.current: four dwelling units - no change
Valuation:
$100,000
Permit #:
100871282
Status:
complete
Fee:
$955
Permit Type:
N/A
Building Type:
N/A
Interior renovation of two story multi dwelling unit building; convert four du's to three du's; new kitchens bathrooms windows and doors meps as per planscurrent: a2 proposed: a2 three dwelling unit
Valuation:
$95,000
Permit #:
100844701
Status:
complete
Fee:
$1,800
Permit Type:
N/A
Building Type:
N/A
Interior alteration of existing 2 story masonry building; 3 story frame addition with a roof deck. work scope to include new windows doors new partition walls new kitchen cabinets; new mep service as per plans. new 2 car garage. current: residential dwelling units - no change (conditional permit subject to field inspections)
Valuation:
$350,000
Permit #:
100695887
Status:
complete
Fee:
$3,146
Permit Type:
N/A
Building Type:
N/A
Interior renovations of existing three (3) story two (2) du masonry building with commercial space at 1st and enclosed porch; remove and replace gyp bd; new doors windows kitchen cabinets and plumbing fixtures; mep as per plans; existing: 2du with commercial space at 1st - no change
Valuation:
$95,000
Permit #:
100798753
Status:
complete
Fee:
$1,425
Permit Type:
N/A
Building Type:
N/A
Internal renovations at existing 3 story/3 unit building w/basement per plans.(conditional permit subject to field inspections)
Valuation:
$165,000
Permit #:
100935861
Status:
issued
Fee:
$996
Permit Type:
N/A
Building Type:
N/A
Interior renovation of an exist. (2) story multi-dwelling frame residence w. bsmt:new drywall on exist. interior wall partition new mechanical electrical and plumbing. replace exist. enclosed wood porch w. new open wood porch in same location
Valuation:
$48,000
Permit #:
100794422
Status:
complete
Fee:
$608
Permit Type:
N/A
Building Type:
N/A
Proposed interior remodeling and repairs for an existing 2 story single family house with attic and basement as per plans
Valuation:
$60,000
Permit #:
100945889
Status:
expired
Fee:
$550
Permit Type:
N/A
Building Type:
N/A
Revision to permit 100798753interior renovation for retail vanilla box mechanical electrical and plumbing as per plansoccupancy: no change
Valuation:
$10,000
Permit #:
100903227
Status:
complete
Fee:
$825
Permit Type:
N/A
Building Type:
N/A
Interior renovation of an exist. two story 2 unit multi-dwelling brick building as per plans**certified corrections- - subject to field inspections & audit **
Valuation:
$35,000
Permit #:
100873887
Status:
complete
Fee:
$624
Permit Type:
N/A
Building Type:
N/A
Reinstating permit no. 100618576; change of general contractor to kerr construction; change of vent//refrig contractor to rps heating and air co.; change of plumbing contractor to diamond mechanical; chnage of mason to gg's tuckpointing
Valuation:
$1
Permit #:
100855158
Status:
issued
Fee:
$500
Permit Type:
N/A
Building Type:
N/A
Self-cert: as-built existing 2 story 2 dwelling unit masonry building with 1st and basement duplex: address building violations of rehab interior; work scope to include new kitchen cabinets doors windows bathrooms mep as per plans. current: two (2) dwelling units - no change
Valuation:
$98,000
Permit #:
100705114
Status:
complete
Fee:
$878
Permit Type:
N/A
Building Type:
N/A
Nterior renovation of an exist. 2-story multi-dwelling brick building w. bsmt: new mechanical electrical and plumbing. replace exist. enclosed wood porch w. new open wood porch in same location
Valuation:
$45,000
Permit #:
100857210
Status:
complete
Fee:
$1,009
Permit Type:
N/A
Building Type:
N/A
Interior renovation of an exist. two story multi-dwelling brick building w. basement:convert basement back to original condition. new mechanical electrical & plumbing. repair exist. open wood porch
Valuation:
$30,000
Permit #:
100846376
Status:
complete
Fee:
$1,294
Permit Type:
N/A
Building Type:
N/A
Interior renovation of an exist. 2 story brick/frame single family residence w. basement mechanical electrical and plumbing upgrade as per plan
Valuation:
$20,000
Permit #:
100861954
Status:
complete
Fee:
$552
Permit Type:
N/A
Building Type:
N/A
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Diamond Mechanical, Inc License info
Inactive License
| License # | BC17532 |
| Status | Inactive |
| City | City Of Chicago |
| Type | Plumbing Contractor |
- According to the City of Chicago Data Portal, 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 Diamond Mechanical, Inc at the City of Chicago Data Portal.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | City Of Chicago |
| Type | Bonded Contractor |
- According to the City of Chicago Data Portal, 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | City Of Chicago |
| Type | Bonded Contractor |
- According to the City of Chicago Data Portal, 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.
This is a sample of licensing data; click here to access a complete history.
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BuildZoom Score
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165
Permits
- Building permit records show that Diamond Mechanical, Inc has worked on 165 permitted projects.