Updated: Jan 01, 2026
Location and Projects
Address
P O BOX 1018, Poway, CA, 92074
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Datum Builders Construction
Datum Builders Inc, Poway, Po Box 1018, Poway, CA (Employees: Marylyn Bamford Caldwell, Michael Alan Bamford, and Patrick Gerard Caldwell) holds a General Building license according to the California license board.
Their BuildZoom score of 97 ranks in the top 18% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Datum Builders Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Datum Builders Inc Services
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Datum Builders Inc Contact Information
Phone Number: (858) 735-6932
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Address: P O BOX 1018, Poway, CA 92074
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Datum Builders Inc Poway
Quality
97
82nd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Datum Builders Inc has a BuildZoom score of 97, which places them above 82% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
1 project
|
2023 |
Our building permit records indicate that Datum Builders Inc has worked on at least
2.0 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.
Pricing
|
1 project
|
$50k-$100k |
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.
Rancho peñasquitos. combination building permit for an existing single family residence. work will include: expansion of existing footprint for kitchen dining living room w relocated fire place. work includes reconfiguration of den new bedroom & pantry. fau unit will be relocated to attic. rs-1-14 geo hzd. cat:53
Valuation:
$88,900
Permit #:
1909283
Status:
complete
Fee:
$2,050
Permit Type:
Add/alt 1 or 2 fa...
Building Type:
N/A
Uptown: combination building permit for the proposed construction of a new detached garage with an adu on the second floor to an existing sdu
Valuation:
N/A
Permit #:
PRJ-1105700
Status:
issued
Fee:
$3,894
Permit Type:
N/A
Building Type:
N/A
Detached adu w/garage 3 bedroom
Valuation:
N/A
Permit #:
B21-1349
Status:
issued
Fee:
N/A
Permit Type:
Adu
Building Type:
N/A
Scripps miramar ranch. combination permit for addition of a patio and enlarging existing master bedroom and bathroom with interior remodel to master closet and create an office space in bedroom at sdu
Valuation:
N/A
Permit #:
PRJ-1042040
Status:
issued
Fee:
$2,160
Permit Type:
N/A
Building Type:
N/A
Uptown: combination building permit for the proposed construction of a new detached garage with an adu on the second floor to an existing sdu
Valuation:
$95,184
Permit #:
PMT-3258501
Status:
issued
Fee:
$3,467
Permit Type:
N/A
Building Type:
N/A
Rancho penasquitos: combination building permit for the proposed addition and remodel to existing sdu. work to include extending existing dining room remodel existing kitchen new window in master bathroom new patio off the rear gas and electric stub out for bbq and fireplace
Valuation:
N/A
Permit #:
PMT-3200980
Status:
complete
Fee:
$1,604
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2012-11-29
Cross street: circa del norte description of work: 311 sqft addition (conversion of porch 1st floor and conversion of deck on 2nd floor) and 500 sqft detached cabana with fireplace (natural gas) plan change - removed 311 sq ft addition and reduced sq footage of cabana to 437 see c of a. vam
Valuation:
$6,570
Permit #:
PDS2012-1001-20120365
Status:
complete
Fee:
$3,058
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2000-01-10
Cross street:el camino real description of work:156 sq. ft. first floor solarium. 918 sq. ft. second floor addition. (no air conditioning & fs) 283 sq. ft. deck space. suppl permit 04/21/00 addition 85 sq ft of retaining wall max 4'8 built to cnty stds (dpl #84) (done as plan change)
Valuation:
$86,885
Permit #:
PDS2000-1004-20000023
Status:
complete
Fee:
$798
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2001-08-23
Cross street: aliso canyontb: 1148 g7description of work: remove & replace existing nat'l gas line @ site (line runs from single family dwelling to exist'g gas-fired pool htr & is in disrepair at various locations).~~damaged line discovered by contractor under scope of work for 1005 20010252. line to be tapped into at later date for future gas bbq~~
Valuation:
$0
Permit #:
PDS2001-1011-20010252
Status:
Completed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2001-08-03
Cross street: aliso canyondescription of work: 788 sq. ft. trellis for existing patio. 771 sq. ft. (hra) patio. 634 sq. ft. gazibos. 490 sq. ft. retaining walls( varying heights from 4 to 8'). 2091 sq. ft. raised deck. (permit renewed @50% on 10/23/02 cia)
Valuation:
$0
Permit #:
PDS2001-1005-20010680
Status:
Completed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2003-10-29
Office:km cross street: kershawn pl. description of work: 735 sq. ft. single family dwelling additions (adding new kitchen & dining room) & major remodel to existing residence consisting of 428 lin. ft. of interior partitions (new & removed) & 1177 sq. ft. new (& removed) window area...2800 sq. ft. reroof w conc. tile & exterior stucco misc. electrical plumbing fixtures & misc. duck w... see more
Valuation:
$123,075
Permit #:
PDS2003-1004-20030846
Status:
complete
Fee:
$771
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2003-08-19
Office:km cross street: kershawn pl. description of work: 735 sq. ft. single family dwelling additions (adding new kitchen & dining room) & major remodel to existing residence consisting of 428 lin. ft. of interior partitions (new & removed) & 1177 sq. ft. new (& removed) window area...2800 sq. ft. reroof w conc. tile & exterior stucco misc. electrical plumbing fixtures & misc. duck w... see more
Valuation:
$123,075
Permit #:
PDS2003-1001-20031429
Status:
triage
Fee:
$1,488
Permit Type:
N/A
Building Type:
N/A
New residential detached accessory structure - plan check-permit
2001-03-06
Cross street: el camino real description of work: pool house with covered deck-2 story with bath/storage/equip room below and covered deck above. 235 1st level 235 2nd level-470sq ft total. 712.5sq ft of retaining wall for tennis court
Valuation:
$17,374
Permit #:
PDS2001-1001-20010348
Status:
triage
Fee:
$357
Permit Type:
N/A
Building Type:
N/A
New residential detached accessory structure - plan check-permit
2001-06-07
Cross street: el camino real description of work: pool house with covered deck-2 story with bath/storage/equip room below and covered deck above. 235 1st level 235 2nd level-470sq ft total. 712.5sq ft of retaining wall for tennis court
Valuation:
$17,374
Permit #:
PDS2001-1006-20010288
Status:
complete
Fee:
$262
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2001-07-12
Cross street: aliso canyon description of work: 788 sq. ft. trellis for existing patio. 771 sq. ft. (hra) patio. 634 sq. ft. gazibos. 490 sq. ft. retaining walls( varying heights from 4 to 8'). 2091 sq. ft. raised deck
Valuation:
$38,945
Permit #:
PDS2001-1001-20011129
Status:
triage
Fee:
$252
Permit Type:
N/A
Building Type:
N/A
Rancho penasquitos. combination permit for proposed addition and remodel to existing single family dwelling. work to include ading bedroom recreation room and study area on the second floor; as well as remodel existing kitchen bathrooms and family room. rs-1-14. esl. geohaz 27
Valuation:
$85,534
Permit #:
1597743
Status:
complete
Fee:
$1,620
Permit Type:
Add/alt 1 or 2 fa...
Building Type:
N/A
Scripps miramar ranch. combination permit for addition of a patio and enlarging existing master bedroom and bathroom with interior remodel to master closet and create an office space in bedroom at sdu
Valuation:
$58,251
Permit #:
PMT-3121055
Status:
canceled
Fee:
$1,784
Permit Type:
N/A
Building Type:
N/A
Single family dwelling addition
Valuation:
$115,000
Permit #:
BLDR-009870-2019
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Interior office tenant improvement. emp tenant: pinnical
Valuation:
$863,100
Permit #:
00632374-SBPT
Status:
issued
Fee:
$1,942
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
1999-10-05
Cross street:el camino real activity code: description of work:156 sq. ft. first floor solarium. 918 sq. ft. second floor addition. 283 sq. ft. deck space
Valuation:
$91,108
Permit #:
PDS1999-1001-99001618
Status:
triage
Fee:
$293
Permit Type:
N/A
Building Type:
N/A
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Datum Builders Inc Reviews
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Verified License
BuildZoom confirmed this contractor's license
Datum Builders Inc License info
Verified License
| License # | 757939 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of December 2025.
Verify this license's status for Datum Builders Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
25
Permits
- Building permit records show that Datum Builders Inc has worked on 25 permitted projects.
Datum Builders Inc Employees
MC
Marylyn Bamford Caldwell
Officer
MB
Michael Alan Bamford
Officer
PC
Patrick Gerard Caldwell
Rmo / Ceo / Pres