Sentinel Builders LLC

What Sentinel Builders LLC does

Sentinel Builders LLC is a privately held, full-service General Contracting and Construction Management firm headquartered at 79 Madison Avenue in New York City, serving the greater New York City metropolitan area. The firm delivers three interconnected core services — Construction Management, General Construction, and Pre-Construction Services (estimating, budgeting, and value engineering) — spanning the full lifecycle from design and planning through project close-out. Its portfolio is diversified across five verticals: Education (e.g., Fordham University, Columbia Teachers College, Wetherby-Pembridge School), Healthcare (e.g., Brightpoint Health, VERG, Planned Parenthood, Sun River Health), Corporate/Commercial (e.g., Aveda Institute, YellowHammer Media), Residential/Real Estate (e.g., Alchemy Properties, CBRE, Avison Young), and Cultural (e.g., Neighborhood Playhouse School of the Theatre, Music Conservatory of Westchester).

Project values disclosed across the portfolio range from approximately $500,000 to over $5,000,000, with fees earned on a per-project, quote-based basis determined through competitive bidding — a classic professional-services revenue model. The firm operates with approximately 11 employees and is led by President Ryan Jennings, a fourth-generation builder with over 20 years of commercial construction experience. Underlying technology consists of standard construction management workflows (monthly reports, RFI logs, proposal logs, look-ahead schedules, daily/weekly reporting) delivered through an 'Open Book' trade-bidding approach; the firm maintains a Squarespace-hosted website and LinkedIn page as its primary digital presence, and an active subcontractor network is core to project delivery.

The business model is enterprise field sales: direct engagement with property owners, developers, educational institutions, healthcare providers, and corporate clients, with projects obtained through competitive bidding, direct inquiries, and client referrals. The firm holds no patents, has no disclosed funding, no parent company, no subsidiaries, and no API or software product lines — it is a pure-play construction services business focused on the NYC market.

Name

Sentinel Builders LLC

Legal name

Sentinel Builders LLC

Website

https://sentinel-builders.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Sentinel Builders LLC is a privately held, full-service General Contracting and Construction Management firm based in New York City, serving the greater NYC metro across education, healthcare, corporate, residential, and cultural sectors with project values ranging from roughly $500K to over $5M.

Ownership category

akta.pro rank

Product category

Construction Services

NAICS

Commercial and Institutional Building Construction (23622)

SIC

Operative Builders (1531), General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

Office & Corporate Building Construction (IMAFACAA)

Keywords

• General contracting services
• Construction management services
• Pre-construction planning
• Commercial construction projects
• Value engineering services

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Construction Project Services: Revenue is generated through construction management and general contracting services for commercial projects. Fees are earned on a per-project basis, with project values ranging from approximately $500,000 to over $5,000,000. The company engages clients from pre-construction phases through project completion and close-out.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Sentinel Builders LLC is a full-service general contracting and construction management firm serving the greater New York City market. The company delivers three core service offerings: Construction Management (engaging all parties from design through project close-out with comprehensive reporting), General Construction (traditional contracting with cost and schedule control and safe site management), and Pre-Construction Services (value engineering, budgeting, scheduling, and long-lead identification). Projects span education, healthcare, corporate, residential, and cultural sectors, with project values typically ranging from approximately $500,000 to over $5,000,000.

Product overview

Sentinel Builders LLC is a full-service General Contracting and Construction Management company offering a unified suite of construction services for the greater New York City market. The company operates three interconnected core service offerings: Construction Management (engaging all parties from design through project close-out with comprehensive reporting), General Construction (traditional contracting with cost and schedule control), and Pre-Construction Services (value engineering, budgeting, and scheduling). These services are delivered across diverse portfolio sectors including Education, Health Care, Corporate, Residential, and Cultural projects.

Differentiator

Problem solved

Functional benefit

Products and services

• Construction Management

Named customers14 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Subcontractor NetworkcoreOthersSentinel Builders maintains relationships with qualified subcontractors essential to project delivery. The company continuously seeks subcontractors with capabilities, resources, and experience to deliver excellent results to clients. Contact for subcontractor opportunities: [email protected]

Scale indicators1 record

Recent moves5 records

Expansion highlights3 records

Direct peers

• Structure Tone: Structure Tone is a NYC-headquartered construction manager and general contractor operating across commercial, institutional, healthcare, and corporate interiors. It is the most directly comparable peer to Sentinel, sharing NYC focus, mid-to-large project scale, and a CM/GC service mix.
• Hunter Roberts Construction Group: Hunter Roberts is a NYC-based full-service construction manager and general contractor serving commercial, institutional, healthcare, and cultural clients. Direct overlap with Sentinel on NYC mid-market institutional and healthcare work and CM/GC delivery model.
• Plaza Construction: Plaza Construction is a NYC-headquartered general contractor and construction manager serving residential, hospitality, commercial, and institutional clients. Comparable to Sentinel on NYC focus, vertical mix (including luxury residential), and project scale.
• Pavarini McGovern: Pavarini McGovern is a NYC-based construction manager and general contractor focused on commercial, institutional, healthcare, and residential projects. Closely aligned with Sentinel on NYC concentration, mid-market project values, and CM-led delivery.
• Cauldwell Wingate: Cauldwell Wingate is a NYC-based general contractor and construction manager with a long-standing focus on commercial, institutional, healthcare, and interior build-out work. Highly comparable in service mix and NYC geographic focus to Sentinel.

Broad incumbents

• Lendlease: Lendlease is a global construction and development firm with NYC commercial, healthcare, and institutional projects. Overlaps with Sentinel on NYC institutional and developer-driven work but at much larger scale and as part of a broader development services portfolio.
• Turner Construction Company: Turner is one of the largest U.S. commercial general contractors with a major NYC presence across healthcare, education, and corporate work. Overlaps with Sentinel on institutional client segments but operates at much larger scale and project size.
• Gilbane Building Company: Gilbane is a large private U.S. construction manager and general contractor with strong education, healthcare, and cultural portfolios including NYC work. Comparable institutional client base to Sentinel, but operates nationally and at significantly larger project size.
• Skanska USA: Skanska is a global construction and development firm with a strong NYC commercial, healthcare, and education portfolio. Competes with Sentinel for institutional and developer clients but at significantly larger project scale.
• AECOM Tishman: AECOM Tishman (formerly Tishman Construction) is a major NYC-based general contractor and construction manager active in commercial, residential, and institutional sectors. Overlaps with Sentinel on NYC institutional and luxury residential work but at much larger scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/sentinel-builders

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Sentinel Builders LLC