Builder Lookup ยท Fairfax, Alexandria and Arlington permit record
Modern Mechanical LLC
Virginia contractor license 2705134143, Class A (no limit on contract size), specialties Alternative energy system contracting, Plumbing, Electrical, Home improvement contracting, Gas fitting contracting and HVAC. Licensed since April 28, 2010; expires May 31, 2028. Per the DPOR regulant list retrieved September 11, 2026.
Ashburn, VA
Fairfax County
Modern Mechanical LLC has 24 jobs on Fairfax County permit records issued September 1, 2022 to September 12, 2026 (31 permits), mostly plumbing work. Retrieved September 12, 2026.
Jobs by year
Peer groups
In Plumbing: 17 jobs.
Closes faster than most peers in this group, based on 13 closed permits in this group. County review cycles, owner decisions and final-inspection scheduling are all inside this number.
Completion about the group median, based on 17 permits in this group. County review cycles, owner decisions and final-inspection scheduling are all inside this number.
In HVAC: 8 jobs.
Not enough record to compare. 8 jobs since September 1, 2022.
In Electrical: 6 jobs.
Not enough record to compare. 6 jobs 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
Modern Mechanical LLC has 3 jobs on City of Alexandria permit records issued September 1, 2022 to September 15, 2026 (6 permits), mostly heating and cooling work. Retrieved September 15, 2026.
Jobs by year
Peer groups
No jobs in any Alexandria peer group. Not enough record to compare. 3 jobs since September 1, 2022.
Works for
Worked for individual homeowners on 67% 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.
Arlington County
Modern Mechanical LLC has 1 job on Arlington County permit records issued September 1, 2022 to September 10, 2026 (1 permit), mostly plumbing work. Retrieved September 11, 2026.
Jobs by year
Peer groups
In Plumbing: 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.
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 March 27, 2023; most recent June 4, 2026. 31 permits, 24 jobs.
- City of Alexandria: permits issued September 1, 2022 to September 15, 2026. First permit in window March 6, 2024; most recent April 30, 2026. 6 permits, 3 jobs.
- Arlington County: permits issued September 1, 2022 to September 10, 2026. First permit in window October 27, 2022; most recent October 27, 2022. 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, City of Alexandria and Arlington County disclaim the accuracy of their data; so does this site.
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Name as written on county permits:MODERN MECHANICAL LLC. DPOR license number 2705134143.
Work by category (jobs): plumbing work 18; heating and cooling work 11; electrical work 6.