Updated: Dec 01, 2025
Location and Projects
Address
20743 NORTHAMPTON STREET, Diamond Bar, CA, 91789
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Romero, Julio Cesar Architect
Romero, Julio Cesar, 20743 Northampton St, Diamond Bar, CA holds a Architect license according to the California license board.
Their BuildZoom score of 104 ranks in the top 9% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Romero, Julio Cesar, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Romero, Julio Cesar Services
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Romero, Julio Cesar Contact Information
Address: 20743 NORTHAMPTON STREET, Diamond Bar, CA 91789
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Romero, Julio Cesar Diamond Bar
Quality
104
91st percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Romero, Julio Cesar has a BuildZoom score of 104, which places them above 91% of 336,931 contractors in California.
Activity
|
20 projects
|
2025 |
|
5 projects
|
2024 |
|
5 projects
|
2023 |
Our building permit records indicate that Romero, Julio Cesar has worked on at least
30.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
11 projects
|
Home Additions |
|
8 projects
|
Commercial Renovations |
Analyzing permits over the last 4 years shows that Romero, Julio Cesar mostly works on
home addition
and commercial renovation
projects.
Pricing
|
1 project
|
$5k-$20k |
|
6 projects
|
$20k-$50k |
|
4 projects
|
$50k-$100k |
|
1 project
|
$100k-$250k |
|
1 project
|
$250k-$500k |
The typical size of their permits is approximately $40,000. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Eplan. change of use from (e) bank to church & interior tenant improvement. (occupancy from b to a3 for an existing church.)
Valuation:
$250,000
Permit #:
25016-10000-02943
Status:
applied
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Eplan scope: work to remove and replace damaged existing walkways decking beams and provide new waterproof coating finish and new waterproof deck system with flashing as required. new decking floor to have adequate/proper drainage slope to drain away from building structures. new coating to be installed over proper and sound framing
Valuation:
$10,000
Permit #:
24016-10000-00399
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Void precess in error(the works involve 1 bldg)
Valuation:
$10,000
Permit #:
24016-10000-03427
Status:
approved
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Voie process in error(works involve 1 bldg)
Valuation:
$10,000
Permit #:
24016-10000-03428
Status:
approved
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Void process in error (the works involve 1 bldg)
Valuation:
$10,000
Permit #:
24016-10000-03426
Status:
approved
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Eplan tenant improvement and interior demising partition to separate existing 2nd floor into 2 separate office suites
Valuation:
$40,000
Permit #:
25016-10000-10248
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Commercial tenant improvement - interior remodel 5995 sf (leasing office)
Valuation:
$460,000
Permit #:
XC2024-0476
Status:
final
Fee:
$11,945
Permit Type:
N/A
Building Type:
N/A
Manufactured - deck and waterpprrofing at 2nd floor walkway from 920 irvine blvd building a to 940 irvine blvd building b
Valuation:
N/A
Permit #:
XR2025-1547
Status:
issued
Fee:
$471
Permit Type:
N/A
Building Type:
N/A
Eplan. exterior alteration to apartment units balconies. replace like for like deck framing members due to dry rot. replace deck plywood sheeting and waterproofing. building a: unit 405 unit 611 building b: unit 412 unit 428 unit 522 unit 529 unit 534 building c: unit 432 unit 439 unit 534 unit 628 building d: unit 412 unit 508 unit 525 unit 603
Valuation:
$31,000
Permit #:
23016-10000-39786
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Exterior alteration to ex. apartment building. replace aluminum cladding at top floor per plans
Valuation:
$25,000
Permit #:
25016-10000-17129
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Use of land for 76 emergency sleeping cabins (148 beds total) 1 guardhouse 1 storage unit and 1 hygiene trailer per cbc appendix o and government code section 8698 et seq. a bridge home
Valuation:
$2,500,000
Permit #:
21020-10000-00276
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Tenant improvement to ex. retail building. re-frame portion of roof. work per engineer. comply with department order effective date 04/15/2020. permit will expire 30 days from issuance date
Valuation:
$50,000
Permit #:
22016-10000-23593
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Manufactured - re-frame decks w/new beams & posts replace deck joists as needed for dryrot/water damage
Valuation:
N/A
Permit #:
XR2025-1242
Status:
issued
Fee:
$358
Permit Type:
N/A
Building Type:
N/A
Manufactured - re-frame decks w/new beams & posts replace deck joists as needed for dryrot/water damage
Valuation:
N/A
Permit #:
XR2025-1236
Status:
issued
Fee:
$358
Permit Type:
N/A
Building Type:
N/A
Manufactured - re-frame decks w/new beams & posts replace deck joists as needed for dryrot/water damage
Valuation:
N/A
Permit #:
XR2025-1235
Status:
issued
Fee:
$358
Permit Type:
N/A
Building Type:
N/A
Manufactured - re-frame decks w/new beams & posts replace deck joists as needed for dryrot/water damage
Valuation:
N/A
Permit #:
XR2025-1234
Status:
issued
Fee:
$358
Permit Type:
N/A
Building Type:
N/A
Manufactured - re-frame decks w/new beams & posts replace deck joists as needed for dryrot/water damage
Valuation:
N/A
Permit #:
XR2025-1232
Status:
issued
Fee:
$436
Permit Type:
N/A
Building Type:
N/A
<eplan> interior remodel and change of use from warehouse to hydroponic agricultural enterprise. (no structural changes to the (e) urm building)
Valuation:
$80,000
Permit #:
24016-20000-27404
Status:
triage
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Commercial tenant improvement im 365 clinic 777 sf
Valuation:
$68,000
Permit #:
XC2025-0025
Status:
final
Fee:
$3,110
Permit Type:
N/A
Building Type:
N/A
Renovation of main entry courtyard & gym with (n) water feature in (e) 4-story apartment building
Valuation:
$100,000
Permit #:
22016-30000-31989
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
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Verified License
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Romero, Julio Cesar License info
Verified License
| License # | C30884 |
| Status | Active |
| State | California |
| Type | Architect |
- BuildZoom verified this license was active as of June 2025.
Verify this license's status for Romero, Julio Cesar at the California Architect License Board.
This is a sample of licensing data; click here to access a complete history.
104
BuildZoom Score
33
Permits
- Building permit records show that Romero, Julio Cesar has worked on 33 permitted projects.