Flagg Construction

What Flagg Construction does

Flagg Construction, operating as Flagg Coastal Homes, is a private design-build custom home construction firm headquartered in Coronado, California, founded in 2007. The company operates as a licensed California general contractor that integrates architectural design and construction under a single delivery model, serving high-net-worth buyers building primary and secondary residences in coastal San Diego submarkets including Coronado, Encinitas, Del Mar, and La Playa in Point Loma. Completed project scope spans roughly $500K to over $20M, with 75+ homes delivered since founding, positioned in the upper tier of the regional custom coastal market rather than competing with production builders.

The business model is project-based fixed-price construction revenue, with services spanning site evaluation, architectural design (in-house via designers such as Dorian Lytle), permitting, and build execution, supported by subcontracted trade labor. Lead acquisition is closely tied to a sister company, Flagship Properties, a boutique luxury real estate brokerage generating approximately $45M in annual sales, providing a vertically integrated broker-to-builder pipeline atypical for the design-build segment. The firm has accumulated brand capital through 22 Houzz awards, the 2014 Coastal Living National Show House, a 2023 Best of Coronado award, and a Coronado Diamond Award.

The firm is small by headcount (1–10 employees), relying on a lean internal leadership structure — founder John O'Brien, CEO Brian Gilhooly (former FBI, appointed 2023), VP Operations Martin Brown (promoted 2023), and project designer Dorian Lytle — with operational scale achieved through subcontracted trades. There is no public disclosure of revenue, funding history, or backlog; capitalization appears to be self-funded or owner-financed. The combination of project-based revenue, concentration in a narrow luxury coastal segment, and tight organizational footprint defines the company's risk and growth profile.

Name

Flagg Construction

Legal name

Flagg Coastal Homes

Website

https://flagg.com

Company type

Private

Founded year

2007

Operating status

Operating

Headcount range

1–10 employees

Short description

Flagg Construction is a licensed California design-build general contractor that designs and builds custom luxury coastal homes for high-net-worth buyers in Coronado, Encinitas, Del Mar, and Point Loma, San Diego, with lead flow supported by sister brokerage Flagship Properties.

Ownership category

akta.pro rank

Product category

Custom Waterfront Home Construction

NAICS

Architectural, Engineering, and Related Services (5413), Architectural Services (54131)

akta.pro primary industry

Office & Corporate Building Construction (IMAFACAA)

Keywords

• Custom home construction
• Design build services
• Luxury residential construction
• Waterfront home building
• Construction project management

Headquarters

HQ city

Coronado

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Operations, Personnel, Supply Chain, Marketing or Sales

Revenue model

1. Custom Home Design & Construction: One-time project-based fees for custom luxury waterfront home design and construction. Projects range from $500,000 to over $20 million. Revenue is generated through design fees, pre-construction services, and construction management.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

The company provides integrated design and construction services for custom waterfront and coastal luxury homes in the San Diego coastal market. Its scope includes architectural design, pre-construction planning, construction management, and coastal materials selection for projects ranging from $500,000 to over $20 million.

Product overview

Flagg Coastal Homes operates as a licensed California Design/Build contractor specializing in luxury waterfront homes along San Diego's coastal regions. The company offers a unified Design & Build service combining architecture, construction, and project management. Their portfolio includes over 75 completed homes in Coronado, Encinitas, Del Mar, and La Playa. The company is complemented by its sister company Flagship Properties, a boutique luxury real estate brokerage that together with Flagg holds the market share of waterfront homes in Coronado.

Differentiator

Problem solved

Functional benefit

Products and services

• Design & Build Services Licensed California Design/Build contractor services specializing in custom waterfront luxury home design and construction across San Diego coastal regions, including Coronado, Encinitas, Del Mar, and La Playa in Point Loma. The integrated service includes architecture, pre-construction, construction management, and coastal materials selection.

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Flagship PropertiescoreStrategic or Co-development PartnerFlagship Properties is a boutique luxury real estate brokerage and sister company to Flagg Coastal Homes. Together, they hold market share of waterfront homes in Coronado, particularly on bayfront and bayview properties on First Street. Flagship Properties closes approximately $45 million per year in sales. Carrie O'Brien serves as Co-Founder and Principal of Flagship Properties.

Scale indicators5 records

Recent moves5 records

Expansion highlights3 records

Regional players

• Davidson Communities: San Diego-based homebuilder active in coastal and master-planned communities across Southern California. Direct regional comparable to Flagg in target geography and product type, though serving a broader price band.
• Cornerstone Communities: San Diego-based residential developer and builder active in coastal infill and luxury townhome projects. Comparable regional competitor with overlapping SoCal coastal product mix.
• McMillin Companies: Multi-generational San Diego homebuilder and developer with a long track record across Southern California coastal communities. Comparable regional competitor with similar San Diego coastal exposure and integrated development capability.

Broad incumbents

• Toll Brothers: The largest publicly traded U.S. luxury homebuilder, operating a national footprint across multiple price tiers. Comparable to Flagg in the high-end custom coastal home segment, but at vastly greater scale and across many geographies.
• Brookfield Residential: Major U.S. homebuilder with deep California operations across multiple price tiers including coastal infill. Comparable as a SoCal residential competitor, though at a different scale and customer profile.
• Shea Homes: Large California-headquartered homebuilder with a strong SoCal presence and a luxury segment (Shea Signature). Competes with Flagg at the high end but at greater scale and with production-builder economics.
• Pardee Homes: California-focused homebuilder with a portfolio spanning move-up to luxury coastal product. Comparable in SoCal coastal markets though operating with a larger, more standardized model than Flagg's bespoke approach.

Direct peers

• Brandon Architects: Coastal Southern California architecture firm (Newport Beach area) specializing in luxury custom coastal residential design. Closest pure-design peer to Flagg's in-house architectural capability and serves a similar HNW coastal buyer profile.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/flagg-coastal-homes

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Flagg Construction