What Best Contracting Services Inc. does

Best Contracting Services Inc. is a private, family-founded specialty contractor that delivers full building-envelope services — roofing, waterproofing, sheet metal, and glazing — to commercial, institutional, and government clients across the Western United States. Founded in 1982 by Moji Taba in Gardena, California, the company operates from two full-service facilities (Gardena, CA and Union City, CA) and is licensed in California, Arizona, Nevada, and Washington. It employs 251-500 people and is organized around four service divisions: Roofing (approved applicator for virtually every major system — BUR, single-ply TPO/PVC, metal, modified bitumen, foam, shingle, tile), Waterproofing (below-grade, between-slab, deck, and plaza applications), Sheet Metal (in-house fabrication of flashing, trim, coping, gutters, and architectural metal components), and Glazing (curtain walls, storefronts, aluminum windows, and specialty glass systems).

The company's core technology is its integrated building-envelope delivery model: factory-trained crews for specific manufacturer systems (Sika Sarnafil, Carlisle, GAF, Fabral, DAMS), an in-house sheet metal fabrication shop, and a safety management system that has produced an Experience Modification Rate (EMR) of 0.89, below the industry average of 1.0. Revenue is generated entirely through project-based contracts awarded via competitive bidding and relationship-based project acquisition with general contractors, property owners, and federal government clients; pricing is custom-quoted per project based on scope, materials, and labor, with no publicly disclosed standard tiers or recurring SaaS-like revenue.

Customer segments span commercial property owners and general contractors (primary), federal government, healthcare facilities, educational institutions, and transportation infrastructure. The project portfolio includes marquee engagements such as Salesforce Transbay Transit Center ($33.5M), Riverside Community Hospital ($13.7M), UCSD Jacobs Medical Center ($9M), LAFC Stadium ($7.2M), SoFi Stadium ($6.4M), and SFO Harvey Milk Terminal ($6M). In 2025, founder Moji Taba transitioned the presidency to Sean Taba, and the company was named Commercial Roofing Contractor of the Year by Roofing Contractor Magazine, underscoring its sustained industry recognition across GAF President's Club, Sika Sarnafil Elite, ENR Top 600, and ENR California rankings.

Name

Best Contracting Services Inc.

Legal name

Best Contracting Services, Inc.

Website

https://bestcontracting.com

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

251–500 employees

Short description

Best Contracting Services Inc. is a private specialty building-envelope contractor providing roofing, waterproofing, sheet metal, and glazing services to general contractors, commercial property owners, and federal government clients across California, Arizona, Nevada, and Washington.

Ownership category

akta.pro rank

Product category

Building Envelope Specialty Contracting

NAICS

Roofing Contractors (23816), Glass and Glazing Contractors (23815)

SIC

Construction - Special Trade Contractors (1700)

akta.pro primary industry

Sheet Metal & Ductwork Contracting (IMAFALAH)

Keywords

• Commercial roofing services
• Building envelope contracting
• Waterproofing installation
• Sheet metal fabrication
• Commercial glazing services

Headquarters

HQ city

Gardena

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Marketing or Sales, Technology or R&D

Revenue model

1. Construction Services - Project-Based: Revenue is generated through direct project-based contracts for building envelope services including roofing, waterproofing, sheet metal, and glazing installation. Services are provided to general contractors, property owners, and federal government clients on a per-project basis with pricing based on project scope, materials, and labor.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Best Contracting Services Inc. is a specialty contracting firm that delivers full building envelope services across Roofing, Waterproofing, Sheet Metal, and Glazing disciplines for industrial, commercial, and institutional properties. The company installs, repairs, and maintains roof systems (BUR, single-ply, modified bitumen, metal, foam, shingle, tile), waterproofing membranes, custom-fabricated sheet metal components, architectural metal wall panels, and curtain wall/storefront glazing systems under project-based contracts awarded by general contractors, property owners, and federal government clients.

Product overview

Best Contracting Services Inc. is a specialty contracting firm providing comprehensive building envelope services. The company operates four core service divisions—Roofing, Waterproofing, Sheet Metal, and Glazing—each offering specialized installation, repair, and maintenance capabilities. The Roofing division handles all types of systems including single-ply (TPO, PVC), built-up roofing, modified bitumen, metal roofing, and foam systems. Waterproofing services cover below-grade, above-grade, and specialty applications. The Sheet Metal division fabricates custom components in-house while the Glazing division installs curtain walls, storefronts, and specialty glass systems. Architectural Metal Wall Panels complete the building envelope offerings. All services are delivered by factory-trained crews with expertise across multiple material manufacturers including Sika Sarnafil, Carlisle, GAF, and others.

Differentiator

Problem solved

Functional benefit

Products and services

• Roofing Services Complete commercial roofing installation, repair, and maintenance covering built-up roofing (BUR), single-ply systems (TPO, PVC), metal roofing, polyurethane foam systems, modified bitumen, shingle, and tile systems. Delivered by factory-trained crews with approved-applicator status across virtually every roofing system type. Targeted at general contractors, property owners, and federal clients on commercial and institutional projects.
• Waterproofing Services Waterproofing installation for below-grade, between-slab, walls, decks, caulked windows, and cold joints, including parking structures, parking and plaza decks, and subterranean garages using various membrane and fluid-applied systems. Targeted at commercial, institutional, and transportation projects where watertight performance is critical.
• Sheet Metal Services Fabrication and installation of general, roof-related, and architectural sheet metal components for various metal systems, including flashing, trim, coping, gutters, and downspouts, produced in the company's in-house sheet metal fabrication shop. Targeted at commercial and institutional building envelope projects requiring custom metal components.
• Glazing Services Glazing division providing and installing curtain walls, storefronts, aluminum windows, window wall, strip windows, structural and point-supported glass wall, slope glazing, operable and fixed window systems, wind shields, and glass railing systems. Targeted at commercial and institutional building envelope projects.
• Architectural Metal Wall Panels Installation of architectural metal wall panel systems including ACM (Aluminum Composite Material) rainscreen panels, standing seam metal panels, and insulated metal panels for building envelope applications. Targeted at commercial building exteriors requiring weather-resistant, design-driven wall panel solutions.
• Repairs & Maintenance Repair and maintenance services for roofing, waterproofing, sheet metal, and glazing systems installed by the company and existing envelope systems, serving commercial, institutional, and industrial property owners requiring ongoing envelope upkeep.

Quantifiable outcome

• EMR rating of 0.89, below industry average of 1.0
• +3 more outcomes

Named customers12 records

Segments6 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Three partnerships are on record, tiered core.

• FabralcoreTechnology or IntegrationPartnership with Fabral for metal roofing and wall panels. Fabral has been the benchmark leader in metal roofing and wall panels for architectural applications since 1967 and bestowed BEST's BART Silicon Valley project with Architectural Winner, Project of the Year 2016. Fabral provided 22 gauge 16" Grand Curve roofing panels customized to Arcadia Green color.
• DAMS Inc.coreTechnology or IntegrationPartnership with DAMS Inc. for Rainscreen ACM (Aluminum Composite Material) Panels. DAMS panels are high-performance exterior composite panels designed to control wind-driven rain on exterior walls. Used in BART Silicon Valley project with 78,000 square feet installed at two locations.
• National Roofing Partners (NRP)coreStrategic or Co-development PartnerNRP is a network of roofing contractors that collaborates on industry initiatives, relief efforts, and best practices. BEST is a member of NRP and participated in Hurricane Harvey and Irma relief efforts through monetary and clothing donations, with NRP matching contributions to the SRS Raise the Roof Foundation.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• CentiMark Corporation: Largest commercial roofing and flooring contractor in North America, offering reroofing, roofing maintenance, and building envelope services to industrial, commercial, and institutional owners. The closest direct peer to Best in terms of large-project commercial envelope contracting across multiple states.
• Nations Roof: Top-10 US commercial roofing contractor providing new construction, replacement, maintenance, and disaster response across multiple service branches. Closely comparable to Best in scale, multi-state footprint, and commercial/industrial focus.
• Tecta America: National commercial roofing contractor formed via roll-up of regional roofing firms, serving commercial, institutional, healthcare, and government clients. Direct competitor for marquee commercial and institutional envelope projects.
• Flynn: Large North American roofing and building envelope contractor with North American operations in roofing, cladding, glazing, and waterproofing. Closely comparable in multi-discipline full-envelope contracting.
• Baker Roofing Company: Mid-Atlantic-based full-service roofing, siding, and sheet metal contractor serving commercial and residential customers. Comparable in service mix (roofing + sheet metal) and customer types.
• Greenwood Industries: Commercial roofing, architectural sheet metal, and wall systems contractor serving institutional, educational, healthcare, and sports clients. Closely comparable in sheet metal + roofing integration and tilt to marquee institutional projects.
• Bone Dry Roofing: Multi-state commercial and residential roofing franchise/contractor offering installation, repair, and maintenance. Comparable as a mid-market roofing specialist, though more residential-skewed than Best.
• Harmon Inc. National glazing, curtain wall, and architectural metal panels contractor. Directly comparable to Best's Glazing division and architectural metal wall panel capability on commercial and institutional projects.

Broad incumbents

• Tremco Roofing and Building Maintenance: Division of RPM International offering roofing systems, waterproofing, and building envelope maintenance plus a national service network. Overlaps with Best's full-envelope offering but at much larger scale and as part of a broader building-products portfolio.

Regional players

• Deer Park Roofing: Mid-market commercial roofing and exteriors contractor with strong regional concentration in the Midwest. Comparable service offering and customer profile but different geographic focus than Best's Western US footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/bestcontractingservicesinc
• LinkedInlinkedin.com/company/827897

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Best Contracting Services Inc.