Updated: Feb 02, 2026
Location and Projects
Address
320 G STREET, Ramona, CA, 92065
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One Square Builders Construction
One Square Builders, 320 G St, Ramona, CA (Owned by: David James Kniff) holds a General Building license according to the California license board.
Their BuildZoom score of 92 ranks in the top 32% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring One Square Builders, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
One Square Builders Services
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One Square Builders Contact Information
Phone Number: (760) 644-5134
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Address: 320 G STREET, Ramona, CA 92065
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This is a sample of this contractor's permits. Click here to access their complete permit history.
New residential detached accessory structure - plan check-permit
2021-06-07
Cross street: 3rd street foundation: slab description of work: 440 sq ft detached garage for existing single family dwelling 1/4/24 final 180 day courtesy extension approved. okay to issue this permit with a pc invalid expired status until 6/7/24. aw 9/06/2022: courtesy plan check extension for 180 days granted due to related issues that covid has caused which slowed down all review p... see more
Valuation:
$17,186
Permit #:
PDS2021-RESACC-000725
Status:
triage
Fee:
$1,175
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2014-05-22
Cross street: acanto dr. description of work: conversion of 746 sf of basement and crawlspace to habitable addition (fam rm/bdrm/bathto exst single family dwelling. 5/7/15-permit renewed at 25%. renewal valid for one (1) year -- must call for a valid inspection showing progress within 180 days to keep permit active-kp
Valuation:
$84,552
Permit #:
PDS2014-RESALT-003139
Status:
complete
Fee:
$1,723
Permit Type:
N/A
Building Type:
N/A
Cross street: g street description of work: 896 sq. ft. single family dwelling addition; 162 sq. ft. trellis/patio; 100 sq. ft. tower entry misc. electric for (e) single family dwelling. 10-18-17 plan change: see c of a for details...lmy
Valuation:
$126,767
Permit #:
PDS2016-RESALT-012660
Status:
complete
Fee:
$4,204
Permit Type:
N/A
Building Type:
N/A
Cross street: g street description of work: adding sump pump for room addition
Valuation:
N/A
Permit #:
PDS2017-RESALT-005990
Status:
expired
Fee:
$282
Permit Type:
N/A
Building Type:
N/A
Commercial alteration or addition - plan check-permit
2017-10-16
Cross street: gunn stage rd description of work: exterior and interior repair to existing commercial building due to automobile accident
Valuation:
$14,000
Permit #:
PDS2014-COMALT-000533
Status:
expired
Fee:
$630
Permit Type:
N/A
Building Type:
N/A
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One Square Builders Reviews
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Verified License
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One Square Builders License info
Verified License
| License # | 707752 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for One Square Builders at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
Bonded
| Bonded Agent | Western Surety Company |
| Bond Value | $15,000 |
One Square Builders Employees
DK
David James Kniff
Owner