Updated: Apr 26, 2026
Location and Projects
Address
15209 48th Ave SE, Everett, WA, 98208
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Cornerstone Photos
Cornerstone Construction
United Seattle is proud to be the “One Stop Construction Service” for your next project. It is so important to have constant communication during construction and United Seattle provides “One point of contact” for all the services you choose. Between the three owners, they have over 40 years of combined general construction experience. They know how hard it is to have eleven different crews on construction site and try to get a hold of a specific trade can needlessly strenuous. United Seattle takes away that stress by providing exceptional work, professional, licensed, and bonded specialists. Finishing on time guarantees are a priority of every trade because planning ahead is key. Provide weekly progress reports on all ongoing projects to provide peace of mind. Not only does United Seattle take care of your construction needs, you can also purchase all the needed materials through them and take advantage of their discounts on all building supplies from major suppliers. Take advantage of United Seattle’s “Multiple trade discount”. Contact them today for a free estimate on any of the services provided and see the benefits you can unlock when you use United Seattle “One Stop Construction Service”.
From BuildZoom: Cornerstone, 15209 48th Ave SE, Everett, WA (Employees: Brennan, James A, Brennan, Nathan C, and Fayant, Michelle) holds a Construction Contractor, Siding license and 5 other licenses according to the Tukwila license board.
Their BuildZoom score of 129 ranks in the top 1% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Cornerstone, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Cornerstone Services
Start a project today:
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Other Residential Remodel
Other Commercial Renovation
Roofing
Hardwood Flooring
Carpets
Laminate Flooring
Other Flooring
Siding
Decks and Porches
Doors and Windows
Framing
Wood Fences
Backsplash and Countertops
Stonework
Tile Flooring
Other Stone and Tile
Drywall
Interior Plaster
Brick and Blockwork
Other Masonry
Interior Design
Cabinets
Finish Carpentry
Whole Home Remodel
Addition
Cornerstone Contact Information
Phone Number: (206) 427-9900
Address: 15209 48th Ave SE, Everett, WA 98208
Cornerstone Everett
Quality
129
99th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Cornerstone has a BuildZoom score of 129, which places them above 99% of 128,670 contractors in Washington.
Activity
|
4 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Cornerstone has worked on at least
5.0 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
|
2 projects
|
$20k-$50k |
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.
Cornerstone Reviews
3 out of 5 stars, based on
2
reviews
-
By Steve L.March 16, 2022
-
By MishaFebruary 27, 2019
On time, respectful, got the job done in a timely and quality manner. 10/10 would hire again.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace existing screen enclosure replace (6) existing antennas and replace/add ancillary equipment on the existing rooftop facility. replace existing cabinets no increase in the overall number of cabinets
Valuation:
$150,000
Permit #:
BLDG-2022-02709
Status:
expired
Fee:
$3,603
Permit Type:
N/A
Building Type:
N/A
Wireless commercial fac - 2018 ibc - at&t sb1646 - removing (6) existing panel antennas and associated equipment. adding (3) lte panel antennas and (6) 5g antenna/radios stacked antennas
Valuation:
$20,000
Permit #:
BLDG-2022-03930
Status:
expired
Fee:
$1,459
Permit Type:
N/A
Building Type:
N/A
Interior remodel and new porch, remodel of existing house. est floor - bedroom 1 - demolition of existing window & wall abv/below new patio door w small exterior patio to be added fnd floor - demolition of existing interior & exterior walls windows & interior doors and plumbing fixtures. new layout to create one large main bedroom walk-in closet and bathroom. new larger windows to be ... see more
Valuation:
N/A
Permit #:
BLD2020-0835
Status:
final
Fee:
$2,053
Permit Type:
N/A
Building Type:
N/A
A single family residential reroofing residence project involving (1 asphalt shingle - new 1 roof rafters or trusses 24 on center 1 plywood or osb 1/2 1 asphalt shingle - existing)
Valuation:
N/A
Permit #:
24 117030 BT
Status:
final
Fee:
$295
Permit Type:
N/A
Building Type:
N/A
Sea rtc - verizon - building e - remove 9 panel antennas remove 3 rrus and electrical addition 6 panel antennas two per sector addition 9 rrus 1 per sector per plan addition 4 ovp 12 and 3 hybrid cable; balance to remain. no ground work. utilizing existing antenna wall mounts see photosims and plans for detail
Valuation:
$30,000
Permit #:
BLDG-2021-01262
Status:
final
Fee:
$1,668
Permit Type:
N/A
Building Type:
N/A
Building b - remove existing asphalt composition shingles and replace with new. total area of construction = 6, 029 sf
Valuation:
$38,321
Permit #:
BLDG-2022-01388
Status:
final
Fee:
$788
Permit Type:
N/A
Building Type:
N/A
Building j - remove existing asphalt composition shingles and replace with new. total area of construction = 6382 sf
Valuation:
$40,477
Permit #:
BLDG-2022-01411
Status:
final
Fee:
$818
Permit Type:
N/A
Building Type:
N/A
Re-roof - 2021 ibc - comparable to comparable. no structural changes. building. c units: 5 6 7
Valuation:
$33,052
Permit #:
BLDG-2024-05512
Status:
final
Fee:
$902
Permit Type:
N/A
Building Type:
N/A
2021 ibc - comparable to comparable. no structural changes. building. g units: 15 16 17
Valuation:
$34,996
Permit #:
BLDG-2024-05621
Status:
final
Fee:
$920
Permit Type:
N/A
Building Type:
N/A
Building h - remove existing asphalt composition shingles and replace with new. total area = 6313 sf
Valuation:
$40,055
Permit #:
BLDG-2022-01410
Status:
final
Fee:
$818
Permit Type:
N/A
Building Type:
N/A
Building e - remove existing asphalt composition shingles and replace with new. total area = 6, 869 sf
Valuation:
$42,825
Permit #:
BLDG-2022-01392
Status:
final
Fee:
$847
Permit Type:
N/A
Building Type:
N/A
Building d - remove existing asphalt composition shingles and replace with new. total area = 6, 419 sf
Valuation:
$40,971
Permit #:
BLDG-2022-01390
Status:
final
Fee:
$818
Permit Type:
N/A
Building Type:
N/A
Building a - remove existing asphalt composition shingles and replace with new. total area = 6, 916 sf
Valuation:
$43,430
Permit #:
BLDG-2022-01387
Status:
final
Fee:
$862
Permit Type:
N/A
Building Type:
N/A
Commercial addition wireless - remove (3) panel antennas (flush-mount) remove (2) rrus (screened) remove (2) diplexers (screened) addition (6) 4g panel antennas (flush-mount) addition (2) 5g antennas (flush-mount) addition (2) hybrid cables addition (6) rrus (screened) addition (2) ovp's (screened) addition (2) ovp's at equipment area addition (1) power trunk line addition (1) nema en... see more
Valuation:
$50,000
Permit #:
BLDG-2019-05288
Status:
final
Fee:
$1,835
Permit Type:
N/A
Building Type:
N/A
Building f - remove existing asphalt composition shingles and replace with new. total area = 5081 sf
Valuation:
$33,085
Permit #:
BLDG-2022-01407
Status:
final
Fee:
$714
Permit Type:
N/A
Building Type:
N/A
Building c - remove existing asphalt composition shingles and replace with new. total area = 3, 982 sf
Valuation:
$26,663
Permit #:
BLDG-2022-01389
Status:
final
Fee:
$610
Permit Type:
N/A
Building Type:
N/A
T-mobile - microsoft building 117 - rooftop - t-mobile proposes modifications to an existing telecommunication facility which includes the removal of 2 fsmf 2 fbbc 2 cabinets 1 mcpa 3 frlb 3 frig 12 diplexers and 6 panel antenna. this project also includes the relocation of a flexi stack to a new fcoa cabinet as well as the installation of 6 panel antennas 3 ahloa 4 abia 2 amob 2 asia... see more
Valuation:
$35,000
Permit #:
BLDG-2018-07567
Status:
final
Fee:
$1,482
Permit Type:
N/A
Building Type:
N/A
Building g - remove existing asphalt composition shingles and replace with new. total area = 3905 sf
Valuation:
$24,385
Permit #:
BLDG-2022-01408
Status:
final
Fee:
$580
Permit Type:
N/A
Building Type:
N/A
Wireless - at&t is going to replace (6) existing antennas addition (6) rrh units and (1) wcs filter and remove (6) tma's. additional work includes relocate (3) antennas onto pipe masts on guardrail relocate (3) rrhs and (6) tmas onto strut on guardrail. (3) of the replacement antennas will be installed on existing mounts and (3) will be installed on mounts relocated to pipe masts on g... see more
Valuation:
$15,000
Permit #:
BLDG-2017-07250
Status:
final
Fee:
$978
Permit Type:
N/A
Building Type:
N/A
Radd - walter wilson & katie addition - 3-story 1, 178 sf addition to existing 2-story residence. addition includes expansion of existing front entrance and new 387 sf deck and stair; 88 sf of deck is covered and remaining 299 sf is uncovered. total area of work = 1, 565 sf basement level shall not be used as an adu now or in the future. house not to be sold with basement level as an adu
Valuation:
$148,658
Permit #:
BLDG-2017-01569
Status:
final
Fee:
$2,911
Permit Type:
N/A
Building Type:
N/A
Verified License
BuildZoom confirmed this contractor's license
Cornerstone License info
Verified License
| License # | CORNESL845O8 |
| Status | Active |
| City | Tukwila |
| Type | Construction Contractor, Siding |
| Class | Limited Liability Company |
| Business Type | Individual, Corporation |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Cornerstone at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | CORNESL845O8 |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Individual, Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Cornerstone at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CORNE**885R8 |
| Status | Inactive |
| City | Tukwila |
| Type | Construction Contractor, Tile, Ceramic, Mosaic, Natural And Mfg Stone |
| Class | Individual |
| Business Type | Individual, Corporation |
- According to the The City of Tukwila, WA, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Cornerstone at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CORNE**885R8 |
| Status | Inactive |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Individual, Corporation |
- According to the Washington State Department of Labor & Industries, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Cornerstone at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CORNEC*910QT |
| Status | Inactive |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Individual, Corporation |
- According to the Washington State Department of Labor & Industries, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Cornerstone at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CORNEI*972RP |
| Status | Inactive |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Individual, Corporation |
- According to the Washington State Department of Labor & Industries, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Cornerstone at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
129
BuildZoom Score
Insured
| Insurer | Ohio Security Ins Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Wesco Insurance Co |
| Bond Value | $6,000 |
Insured
| Workers Comp Provider | L&I |
79
Permits
- Building permit records show that Cornerstone has worked on 79 permitted projects.
Cornerstone Employees
BA
Brennan, James A
President
BC
Brennan, Nathan C
Treasurer
FM
Fayant, Michelle
Agent
JB
Jeremy Brennan
Vice President
NB
Nathan Brennan
Partner/Member
RP
Ryakhovskiy, Anna P
Governing Persons
RA
Ryakhovskiy, Oleg A
Governing Persons
Had a home built who used Cornerstone to install the about two years ago and the siding is coming off the house. You would think siding would last longer than that