Builder Lookup · Fairfax, Arlington and Alexandria permit record
K One Corp
Virginia contractor license 2705031319, Class A (no limit on contract size), specialties Commercial building and Residential building. Licensed since October 18, 1995; expires October 31, 2027. Per the DPOR regulant list retrieved September 11, 2026.
McLean, VA
Fairfax County
K One Corp has 13 jobs on Fairfax County permit records issued September 1, 2022 to September 12, 2026 (14 permits), mostly decks and porches. Retrieved September 12, 2026.
Jobs by year
Peer groups
In Additions and second stories: 4 jobs.
Not enough record to compare. 4 jobs since September 1, 2022.
In Decks and porches: 4 jobs.
Not enough record to compare. 4 jobs since September 1, 2022.
In Basement finishes: Not enough record to compare. 2 jobs since September 1, 2022.
In New single-family houses: Not enough record to compare. 1 job since September 1, 2022.
In Kitchen and bath: Not enough record to compare. 1 job since September 1, 2022.
Works for
Worked for individual homeowners on 92% of jobs; the rest were company-owned properties (builders, investors, LLCs).
Crew
| Trade partner | Trade | Shared sites |
|---|---|---|
| RRF Solutions LLC | Plumbing | 7 |
| RRF Solutions LLC | Electrical | 7 |
| RRF Solutions LLC | Mechanical (HVAC) | 6 |
Where they work
Jobs by zip code
Fewer than 3 jobs in any one zip code.
Zip codes and map cells with fewer than 3 jobs are not shown.
Fewer than 3 jobs in any one map cell, so no map is shown.
Arlington County
K One Corp has 1 job on Arlington County permit records issued September 1, 2022 to September 10, 2026 (2 permits), mostly kitchen and bath work. Retrieved September 11, 2026.
Jobs by year
Peer groups
In Additions and second stories: Not enough record to compare. 1 job since September 1, 2022.
Works for
Worked for individual homeowners on 100% of jobs; the rest were company-owned properties (builders, investors, LLCs).
Crew
No electrical, plumbing or mechanical firm shares 3 or more permitted sites with this firm on record.
Where they work
Jobs by zip code
Fewer than 3 jobs in any one zip code.
Zip codes and map cells with fewer than 3 jobs are not shown.
Fewer than 3 jobs in any one map cell, so no map is shown.
City of Alexandria
K One Corp has 1 job on City of Alexandria permit records issued September 1, 2022 to September 15, 2026 (1 permit), mostly additions. Retrieved September 15, 2026.
Jobs by year
Peer groups
In Additions and second stories: Not enough record to compare. 1 job since September 1, 2022.
Works for
Worked for individual homeowners on 0% of jobs; the rest were company-owned properties (builders, investors, LLCs).
Crew
No electrical, plumbing or mechanical firm shares 3 or more permitted sites with this firm on record.
Where they work
Jobs by zip code
Fewer than 3 jobs in any one zip code.
Zip codes and map cells with fewer than 3 jobs are not shown.
Fewer than 3 jobs in any one map cell, so no map is shown.
Sources and notes
- Arlington County permit records (open data API), retrieved September 11, 2026
- Arlington County permit portal, retrieved September 11, 2026
- City of Alexandria APEX permit portal (public search and permit details), retrieved September 15, 2026
- Fairfax County PLUS permit portal, "Building Records Issued" report, retrieved September 12, 2026
- Virginia DPOR regulant lists (contractor and tradesman licenses), retrieved September 11, 2026
- Fairfax County: permits issued September 1, 2022 to September 12, 2026. First permit in window December 7, 2022; most recent August 3, 2026. 14 permits, 13 jobs.
- Arlington County: permits issued September 1, 2022 to September 10, 2026. First permit in window July 26, 2024; most recent October 28, 2024. 2 permits, 1 job.
- City of Alexandria: permits issued September 1, 2022 to September 15, 2026. First permit in window June 26, 2025; most recent June 26, 2025. 1 permit, 1 job.
- Jobs are distinct permitted sites; a site with several permits counts once.
Permit records show what was permitted, when, and by whom. They do not show workmanship, price fairness, or unpermitted work. Declared values are entered by applicants and are commonly understated. Completion figures reflect the county's closing process and are shown only relative to peers in the same window. Fairfax County, Arlington County and City of Alexandria disclaim the accuracy of their data; so does this site.
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Name as written on county permits:K ONE CORP; K-ONE CORPORATION. DPOR license number 2705031319.
Work by category (jobs): additions 6; decks and porches 4; kitchen and bath work 2; basement finishes 2; work outside the site’s categories 1; roofing, siding, windows and doors 1; new houses 1.