Addon Services LLC

Alexandria, VA

UEI
CZUVDNASMGP5
CAGE
8AU65
Primary NAICS
236220 Commercial and Institutional Building Construction
SAM.gov registration
Active through

Company facts

SBA certifications
Women-Owned Small Business
· Current
Economically Disadvantaged Women-Owned Small Business
· Current
Self-certified in SAM.gov
  • For Profit Organization
  • Limited Liability Company
  • Subcontinent Asian (Asian-Indian) American Owned
  • Woman Owned Business
  • Woman Owned Small Business
  • Minority Owned Business
  • Self Certified Small Disadvantaged Business
Entity structure
Corporate Entity (Not Tax Exempt)
NAICS codes registered in SAM.gov
Show all
SAM.gov registration date
Physical address
1800 Diagonal Rd #600, Alexandria, VA 22314, USA
Website
addonservicesllc.com
Founded
2012
Employees
11-50
Estimated annual revenue
$1M-$10M
Industry
  1. Industrials
  2. Capital Goods
  3. Construction & Engineering
SIC code
87 Engineering & Management Services
Profiles

Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .

Recent federal awards

Addon Services LLC's 5 most recent federal contract and grant awards, newest first. Amounts are dollars obligated.
Award Agency Obligated Awarded
C115324 - RTP electrical underground distribution repair. Install new MV cable Contract · 75N99026F00001 NIH Construction $4,414,710
Design-build construction services to repair north parking structure at the mark center Contract · HQ003425FE568 Washington Headquarters Service $3,750,000
Design-bid-build construction to repair retaining wall Contract · HQ003424F0672 Washington Headquarters Service $9,491,535
Design-build construction for upgrade of north rotary road fern vehicle access control point fence Contract · HQ003424F0596 Washington Headquarters Service $3,042,425
C115956 - HVAC, electrical and architectural renovations to self service store [24-004628] Contract · 75N99024F00002 NIH Construction $712,822

About Addon Services LLC

Written by GovTribe AI ·

Addon Services LLC is a woman-owned small business and Economically Disadvantaged Women-Owned Small Business (EDWOSB) certified by the Small Business Administration, headquartered in Alexandria, Virginia. The company specializes in design-build and design-bid-build construction, renovation, and facility improvement services for federal agencies, including specialized work in environmental compliance, infrastructure modernization, and maintenance of critical government facilities across multiple departments and agencies.

Addon Services LLC has demonstrated extensive experience delivering construction and facility improvement services through a diverse portfolio of federal contract awards spanning defense, health, and civilian agencies. The company has completed or is executing multiple delivery orders under various indefinite delivery contracts, including significant projects with the Washington Headquarters Service for design-build construction services at the Pentagon Reservation, such as the $3.75 million North Parking Structure repair at the Mark Center (awarded September 2025), a $9.43 million retaining wall repair project (awarded September 2024), a $3.24 million west end security fence upgrade (awarded June 2024), and a $3.04 million North Rotary Road Fern Vehicle Access Control Point Fence upgrade (awarded September 2024). The National Institutes of Health Construction program has awarded multiple delivery orders to Addon Services for facility improvements at the Research Triangle Park campus, including HVAC and architectural renovations valued at $665,419, air handling unit replacements totaling $1.47 million, fire pump removal and sprinkler system enhancements of $933,842, and roof refurbishment work valued at $2.33 million, with completion dates extending through 2026. The company also holds a family advocacy program support contract with the Department of Defense Northeast Region valued at $1.52 million through October 2027, and completed a $1.39 million electrical repair project for the National Oceanic and Atmospheric Administration. These awards reflect Addon Services' capability to manage firm-fixed-price construction projects ranging from approximately $5,000 minimum guarantee amounts to multi-million dollar complex facility improvements, with set-aside designations including total small business, competitive 8(a), 8(a) sole source, and unrestricted competitive awards.

Addon Services LLC holds three significant indefinite delivery contracts providing flexible access to federal construction and facility services. The company maintains a $450 million multiple-award Indefinite Delivery Contract with the Naval Facilities Engineering Command (NAVFAC) under the Hampton Roads Area of Virginia MACC, awarded April 2024 with a total small business set-aside, enabling design-build and design-bid-build construction and renovation services across the Hampton Roads region through April 2026 with four one-year option periods. The National Institutes of Health Construction program awarded Addon Services a $49.999 billion competitive 8(a) IDC in March 2023 for construction and facility improvement projects at the Research Triangle Park campus, with an ultimate completion date of March 2028, under which multiple delivery orders have been issued for building systems upgrades and renovations. The Washington Headquarters Service awarded a $45 million multiple-award TMDL-P (Total Maximum Daily Load and Paving Contract) with a woman-owned small business set-aside in September 2022, providing design-build and design-bid-build construction services across the Pentagon Reservation to support Department of Defense compliance with Chesapeake Bay pollution limits and stormwater management requirements through September 2027, with task orders ranging from $500,000 to $15 million and a minimum guarantee provision. Through these IDVs and their parent vehicles, Addon Services has established itself as a key provider of construction and infrastructure services to federal facilities, with the flexibility to address diverse facility improvement needs across multiple agencies and geographic regions.

Contract vehicles

Addon Services LLC holds a place on 3 federal contract vehicles. Active vehicles first.

SBA capabilities narrative

From the vendor's SBA profile

Addon Services LLC is successfully executing IDIQ and JOC federal contracts within military bases. The projects include historic building renovation construction. Design Build construction encompassing a comprehensive list of Definable Features of Work including Mechanical, Electrical, Plumbing (MEP), HVAC, Piping, Ductwork, Roofing, Paving, Architectural, Infrastructure. Our customers were impressed with Addon's successful completion of projects that they awarded us several contracts in the field of IT, Tech Pubs, Engineering & Professional support services.We are a distributer of UVSheltron UVC and Pure Air decontamination/disinfection products, PPE, masks, lab testing, medical and non-medical equipment sterilization, sanitization, bacteria/virus eradication.

Quick answers

What is Addon Services LLC's UEI?

Addon Services LLC's Unique Entity ID (UEI) in SAM.gov is CZUVDNASMGP5.

What is Addon Services LLC's CAGE code?

Addon Services LLC's CAGE code is 8AU65.

What is Addon Services LLC's primary NAICS code?

Addon Services LLC's primary NAICS code is 236220 (Commercial and Institutional Building Construction).

Where is Addon Services LLC located?

Addon Services LLC's physical address in SAM.gov is 1800 Diagonal Rd #600, Alexandria, VA 22314, USA.

Is Addon Services LLC registered in SAM.gov?

Yes. Addon Services LLC's SAM.gov registration is active through September 11, 2027.

Which SBA certifications does Addon Services LLC hold?

Addon Services LLC holds Women-Owned Small Business and Economically Disadvantaged Women-Owned Small Business certifications from the SBA.

Which contract vehicles does Addon Services LLC hold?

Addon Services LLC holds a place on 3 federal contract vehicles, including NIH 8(a) Construction Services at Research Triangle Park 2023 - 2028.

What is Addon Services LLC's most recent federal award?

Addon Services LLC's most recent federal contract award is C115324 - RTP electrical underground distribution repair. Install new MV cable (75N99026F00001), from NIH Construction, on August 6, 2026.

On GovTribe

See Addon Services LLC's full federal record

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  • IDV awards
  • Contract vehicles
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