Updated: Dec 24, 2025
Location and Projects
Address
PO Box 1543, Hawthorne, CA, 90250
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Hamilton John O Construction
Serving clients throughout Hawthorne, CA, Hamilton John O specializes in residential construction projects. The company brings expertise in managing new construction, remodels, and renovation work for area homeowners. With two years of experience in the industry, Hamilton John O has overseen a variety of permitted projects, reflecting a focus on local building codes and compliance. The contractor works directly with property owners to deliver tailored solutions for improving or expanding living spaces. Hamilton John O provides guidance through each phase of construction, ensuring projects align with client objectives and current regulations in the Hawthorne area.
Hamilton John O Services
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Hamilton John O Contact Information
Address: PO Box 1543, Hawthorne, CA 90250
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Hamilton John O Hawthorne
Quality
101
88th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Hamilton John O has a BuildZoom score of 101, which places them above 88% of 336,931 contractors in California.
Activity
|
17 projects
|
2025 |
|
3 projects
|
2024 |
Our building permit records indicate that Hamilton John O has worked on at least
20.0 projects over the past 2 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
|
9 projects
|
Home Additions |
|
4 projects
|
Multi-room remodels |
Analyzing permits over the last 4 years shows that Hamilton John O mostly works on
home addition
and multi-room remodel
projects.
Pricing
|
6 projects
|
< $5k |
|
5 projects
|
$5k-$20k |
|
2 projects
|
$20k-$50k |
|
4 projects
|
$50k-$100k |
|
1 project
|
$100k-$250k |
|
1 project
|
$500k-$1mil |
The typical size of their permits is approximately $13,500. 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: 2of2 convert ex. 2-car garage to 2-story adu w 435sf total addition per lamc 12.22 a.33(c) and (d)
Valuation:
$175,000
Permit #:
24014-10000-00167
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Conversion of portion of 1st floor at the rear of (e) duplex into an attached 195sf adu per lamc 12.22 a.33 (c) and (e)
Valuation:
$10,000
Permit #:
25016-10000-22986
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental 21014-10000-06324 to change scope of work to convert unpermitted storage and garage built prior to januray 1 2018 to adu per state law update structural inventory. existing construction that does not pose a threat to the publics health and safety was allowed per government code section 55.852.2(d)(2)
Valuation:
$15,000
Permit #:
21014-10001-06324
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to 23014-20000-05103 to revise floor plan framing plan to revise openings and addition structural detail per engineer design
Valuation:
$501
Permit #:
23014-20001-05103
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
E-plan. proposed remodel and addition to expand (e) bedroom with new attach. patio cover
Valuation:
$80,550
Permit #:
24014-10000-02149
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental 23014-10000-02126 to revise building seperation dim on plot plan and revise demolish plan revise structural plan
Valuation:
$12,000
Permit #:
23014-10001-02126
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental to 23016-10000-11357 to recheck lost plans and addition engineer of record: conversion of a detached garage into adu
Valuation:
$501
Permit #:
23016-10001-11357
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Convert (e) 10 x 20 patio cover enclosure to (n) bedroom and reroof all work per wfpp
Valuation:
$11,500
Permit #:
24016-10000-16302
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Bathroom addition to rear of (e) dwelling
Valuation:
$15,000
Permit #:
25014-10000-03996
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
To convert existing det garage to an accessory dwelling unit and addition 392 sq. ft. for total of 714 sq. ft. per state gc 66323(a)(2)
Valuation:
$90,000
Permit #:
25014-10000-05510
Status:
triage
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
*eplan* **2025 wildifre rebuild eo1 eligible project** remove and recompact for new single family dwelling with attached garage and attached adu
Valuation:
$235
Permit #:
25030-10000-08402
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Eplan: kitchen remodel 63sf addition and load bearing wall removal
Valuation:
$45,000
Permit #:
25014-20000-05202
Status:
triage
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplementyal permit to change work description to change of use from retail to restaurant by creating new opening between 2 buildings and new dining room comply with dept's order
Valuation:
N/A
Permit #:
24016-10001-03685
Status:
triage
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Eplan. convert detached 18'x18 garage into adu and addition 20'x10 for new bedroom and full bathroom
Valuation:
$42,000
Permit #:
25014-10000-04444
Status:
triage
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Interior remodel and new entry remodel and addition to single family dwelling
Valuation:
$65,000
Permit #:
25014-10000-05321
Status:
triage
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Suppl. permit to 25016-20000-23597 to re-check lost plans
Valuation:
$501
Permit #:
25016-20001-23597
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental to 24016-10000-26768 to remove the 3 proposed skylights from the scope of work. no change in plot plan
Valuation:
$501
Permit #:
24016-10001-26768
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental to 23016-10000-07823 & 23016-10001-07823. to restamp plans. no changes
Valuation:
$501
Permit #:
23016-10004-07823
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Eplan addition to and remodel of existing single family dwelling
Valuation:
$90,000
Permit #:
25014-10000-04758
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
**2025 wildfire eo1 eligible project** eo1 new two story single family dwelling with attached garage and new attached accessory dwelling unit per ordinance lamc 12.22 a.33 (c) and (e); equipped with nfpa 13d sprinklered through out
Valuation:
$700,000
Permit #:
25010-10000-03365
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
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Hamilton John O License info
License Not Required
| Status | Not Required |
- BuildZoom verified in June, 2024 that this contractor does not need a license to be a contractor in California.
This is a sample of licensing data; click here to access a complete history.
101
BuildZoom Score
20
Permits
- Building permit records show that Hamilton John O has worked on 20 permitted projects.