Updated: Jun 13, 2026
Location and Projects
Address
PO BOX 12370, Denver, CO, 80212
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Squareroot Construction
Squareroot, Inc, Denver, Po Box 12370, Denver, CO (Owned by: Douglas Lambert) holds a Building Contractor Class B license and 12 other licenses according to the Denver license board.
Their BuildZoom score of 108 ranks in the top 5% of 55,949 Colorado licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Squareroot, Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Squareroot, Inc Services
Start a project today:
Custom Home Build
New Home Construction
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Medium Multi-Family Remodel...
Other Residential Remodel
Office Renovation
Restaurant Renovation
Retail Renovation
Other Commercial Renovation
Pole Barn
Industrial Renovation
Hotel Renovation
Warehouse Renovation
ADU
Small Multi-Family New Cons...
Small Multi-Family Remodel ...
Whole Home Remodel
Modular Home Construction
Pool House
Sunrooms and Greenhouses
Other Secondary Structure N...
Addition
Vertical Addition
Horizontal Addition
Vertical and Horizontal Add...
Attic Remodel
Single Room Remodel
Cosmetic Remodel
Large Multi-Family Remodel ...
Healthcare Facility Renovation
Squareroot, Inc Contact Information
Phone Number: (303) 881-2746
Address: PO BOX 12370, Denver, CO 80212
Squareroot, Inc Denver
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Squareroot, Inc has a BuildZoom score of 108, which places them above 95% of 55,949 contractors in Colorado.
Activity
|
7 projects
|
2025 |
|
9 projects
|
2024 |
|
11 projects
|
2023 |
Our building permit records indicate that Squareroot, Inc has worked on at least
27.0 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
|
18 projects
|
Home Additions |
|
4 projects
|
Multi-room remodels |
|
3 projects
|
Kitchen remodels |
Analyzing permits over the last 4 years shows that Squareroot, Inc mostly works on
home addition
and multi-room remodel
projects.
Pricing
|
1 project
|
< $5k |
|
5 projects
|
$5k-$20k |
|
1 project
|
$50k-$100k |
|
2 projects
|
$250k-$500k |
The typical size of their permits is approximately $12,451. 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.
1000 s cook st - single family residence - int remodel-windows 1. primary bathroom remodel 2. enlarge window on west elevation above front door @ second level. 3. new transom window in primary bedroom on north wall @ second level. 4. new window in stair well going to basement on south wall
Valuation:
N/A
Permit #:
2025-RESCON-0001515
Status:
filed
Fee:
$400
Permit Type:
N/A
Building Type:
N/A
Demolish of existing detactched garage. construction of new 460sf adu. addition of 208 sf to the existing home 7.8%. adu address is 4209 w 23rd ave. home address is 4209 w 23rd ave. home was fully remodeled in 2020-2021 under permit #2020-rescon-0003352 new adu address is 4209 w 23rd ave per # 2025-adsrs-0000107
Valuation:
N/A
Permit #:
2025-SUDP-0000791
Status:
issued
Fee:
$725
Permit Type:
New
Building Type:
N/A
Demolish of existing detactched garage. construction of new 460sf adu. addition of 208 sf to the existing home 7.8%. adu address is 4209 w 23rd ave. home address is 4209 w 23rd ave. home was fully remodeled in 2020-2021 under permit #2020-rescon-0003352 new adu address is 4209 w 23rd ave per # 2025-adsrs-0000107
Valuation:
N/A
Permit #:
2025-SUDP-0000790
Status:
issued
Fee:
$425
Permit Type:
New
Building Type:
N/A
2-story addition to side of house over crawl space. first floor addition to be guest bedroom/office and bathroom and upper level to be extension of primary bedroom suite. kitchen will also be remodeled
Valuation:
$85,000
Permit #:
2024-LOG-0003422
Status:
approved
Fee:
$333
Permit Type:
N/A
Building Type:
N/A
3120 meade st - single family residence - 2-story addition w bsmt-new patio-steps-fence rear 2-story single family addition 1. demolition of existing wood framed addition including kitchen mud room and powder room. 2. demolition of existing concrete patio and landscape. 3. construction of new 2 story addition including basement. 4. construction of new concrete patio and steps. 5. cons... see more
Valuation:
N/A
Permit #:
2022-RESCON-0000637
Status:
final
Fee:
$89
Permit Type:
N/A
Building Type:
N/A
710 n leyden st - single family residence - addition/remode addition to rear. remodel of first floor. air conditioning unit
Valuation:
$500,000
Permit #:
2024-LOG-0000033
Status:
withdrawn
Fee:
$1,505
Permit Type:
N/A
Building Type:
N/A
2-story addition to side of house over crawl space. first floor addition to be guest bedroom/office and bathroom and upper level to be extension of primary bedroom suite. kitchen will also be remodeled
Valuation:
N/A
Permit #:
2024-RESCON-0001479
Status:
issued
Fee:
$2,564
Permit Type:
N/A
Building Type:
N/A
4425 w hayward pl - remodel-egress windows-int structural we are applying for a remodel permit of a side stoop and roof that are being replaced and 2 egress wells. then interior alterations with minor structural changes under 30%
Valuation:
$160,000
Permit #:
2021-LOG-0000325
Status:
approved
Fee:
$553
Permit Type:
N/A
Building Type:
N/A
Basement remodel first floor remodel and addition of mudroom
Valuation:
$380,000
Permit #:
2022-LOG-0014856
Status:
approved
Fee:
$1,169
Permit Type:
N/A
Building Type:
N/A
*removal and replacement of upper level deck on west elevation of home. removal of deck on north elevation of home. no change in size or coverage area
Valuation:
N/A
Permit #:
BLD-SFD2020-00315
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replacement of existing raised deck in rear yard approximately 312 sf and 4 feet above grade to include steps and rail application originally submitted under bld-sfd2021-00280 change of contractor
Valuation:
N/A
Permit #:
BLD-SFD2021-00552
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Demolish of existing detactched garage. construction of new 460sf adu
Valuation:
N/A
Permit #:
2025-FAI-0000726
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single family detached dwelling - addition and remodel
2024-01-30
Replace existing 530sf raised deck with 12-rise steps. framing to be treated syp. decking to be 5/4 x 6 composite trex or similar. railing to be pre-fab metal
Valuation:
$8,809
Permit #:
BLD-SFD2023-00323
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Addition to a single family detached dwelling
2023-06-28
*expand existing 2nd story deck form 200 sf existing to 400 sf new w 16 rise steps and mid-span landing. the new deck is approx 10 above grade and will be constructed with treated syp and the decking will be composite 5/4 x 6 trex or similar. the railing will be composite with aluminum balusters and 4 x 4 wood rail-posts. the stairs will include an ada-compliant hand-grip in addition ... see more
Valuation:
N/A
Permit #:
BLD-SFD2020-00385
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace existing raised deck 180 sf. includes 8-rise steps. addition pergola +/- 128 sf above. re-deck and re-enforce balcony deck
Valuation:
N/A
Permit #:
BLD-SFD2021-00515
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Addition to existing structure
Valuation:
$280,000
Permit #:
2021-LOG-0007783
Status:
approved
Fee:
$889
Permit Type:
N/A
Building Type:
N/A
This work is for a residential interior remodel only with no structural modifications
Valuation:
N/A
Permit #:
2023-RESCON-0000131
Status:
final
Fee:
$1,050
Permit Type:
N/A
Building Type:
N/A
Modified drawings: adjusted fence locations added site sculptures added ground level air conditioning units addition pond added rooftop air conditioning units
Valuation:
N/A
Permit #:
2021-RESCON-0001177
Status:
final
Fee:
$250
Permit Type:
N/A
Building Type:
N/A
Demolish of existing detactched garage. construction of new 460sf adu
Valuation:
N/A
Permit #:
2025-RESCON-0000944
Status:
issued
Fee:
$1,756
Permit Type:
N/A
Building Type:
N/A
New two story single family home at 4457 perry st. with detached garage
Valuation:
N/A
Permit #:
2023-FAI-0000395
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Squareroot, Inc Reviews
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Squareroot, Inc License info
Verified License
| Status | Active |
| City | Denver |
| Type | Building Contractor Class B |
- BuildZoom verified this license was active as of June 2026.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| County | Jefferson County |
| Type | Class C Contractor (1 2 Family Dwellings) |
| Class | 1-2 Family Dwellings |
- When BuildZoom last verified this license, it had an expiration date of December, 2023. Check the current license status of Squareroot, Inc with the Jefferson County Licensed Contractors
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | GCC5876662 |
| Status | Active |
| City | Lafayette |
| Type | General Class C |
- When BuildZoom last verified this license, it had an expiration date of May, 2022. Check the current license status of Squareroot, Inc with the City of Lafayette
This is a sample of licensing data; click here to access a complete history.
License Not Required
| Status | Not Required |
- BuildZoom verified in October, 2018 that this contractor does not need a license to be a contractor in Colorado.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | LIC-0002173 |
| Status | Active |
| City | Boulder |
| Type | General Contractor |
| Class | Class C |
- When BuildZoom last verified this license, it had an expiration date of December, 2018. Check the current license status of Squareroot, Inc with the Boulder Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 0002173 |
| Status | Active |
| City | Boulder |
| Type | General Contractor Class C |
- When BuildZoom last verified this license, it had an expiration date of August, 2015. Check the current license status of Squareroot, Inc with the Boulder Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 24631 |
| Status | Active |
| City | Thornton |
| Type | Class B Building |
- When BuildZoom last verified this license, it had an expiration date of September, 2017. Check the current license status of Squareroot, Inc with the Thornton City Development Contractor License
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | C00089 |
| Status | Inactive |
| City | Littleton |
| Type | Class C |
- According to the The City of Littleton, CO, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Squareroot, Inc at the The City of Littleton, CO.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Denver |
| Type | Building Contractor Class B |
- According to the City and County of Denver Community Planning and Development, the status of this license was at one point cancelled. However, this information may have changed.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | AEC2866 |
| Status | Inactive |
| City | Arvada |
| Type | Contractor |
- According to the The City of Arvada, Colorado, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Squareroot, Inc at the The City of Arvada, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CON-12-0082 |
| Status | Inactive |
| County | Boulder County |
| Type | One And Two Family Residential |
- According to the Boulder County Land Use Department, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Squareroot, Inc at the Boulder County Land Use Department.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LCC2015062511 |
| Status | Inactive |
| City | Thornton |
| Type | Class B Building Contractor |
- According to the Thornton City Development Contractor License, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Squareroot, Inc at the Thornton City Development Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-93143-3 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Squareroot, Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
208
Permits
- Building permit records show that Squareroot, Inc has worked on 208 permitted projects.
Squareroot, Inc Employees
DL
Douglas Lambert
Owner
OJ
O Brian Mark J
Owner