Duffie Inc

What Duffie Inc does

Duffie Inc (legal entity Ralph J. Duffie, Inc.) is a family-owned, vertically integrated real estate firm founded in 1953 by Commander Ralph J. Duffie in Silver Spring, Maryland. Now in its third generation of family leadership under President Jeremy Duffie, the company operates a long-term ownership model in the Washington DC Metro area spanning three core service lines: real estate development (acquisition, entitlements, construction focused on high-performance sustainable buildings), general contracting through its wholly-owned subsidiary Consolidated Commercial Services (established 1993), and in-house property and asset management. The firm has delivered more than 2,000 multifamily units, repositioned over 2,500 units, and completed in excess of $1 billion in LEED-certified projects including five Platinum certifications. Current portfolio includes roughly 2,000+ apartment units generating approximately $60 million in gross annual revenue under management.

The business model rests on patient capital and lifecycle integration: Duffie develops, constructs, holds, and manages most of its own assets rather than merchant-building for sale, generating revenue from a mix of long-term rental income, development fees, and general contracting services. Revenue streams include real estate development (professional services and asset sales), general contracting and facility maintenance through CCS (24-hour emergency, planned preventative maintenance, snow and ice management for multi-family, commercial, and federal clients), managed property services for owned and partnered assets, and a tangential custom sportfish yacht manufacturing operation via Duffie Boatworks in Ocean City, MD. The customer base is a hybrid of internal portfolio tenants, named property management partners (Bozzuto, Perrontee, Grady Management, The Halle Companies, HOCMC), and government entities including Maryland State Highway Administration, Montgomery County, and Frederick County.

Operationally, the firm runs lean with 11-50 employees concentrated at its 57 Randolph Road, Silver Spring headquarters, supplemented by the Ocean City manufacturing facility. The leadership team blends family executives (Jeremy, Jonny, Justin Duffie) with specialized hires including CFO Jennifer Wowkanyn, LEED-accredited VP Development & Construction Tim Kamas, and credentialed asset managers Kim Martin and Grant Matthews. Marketing is minimal — primarily the corporate website and individual property-specific microsites — reflecting a relationship-driven, low-volume transaction profile typical of long-cycle regional real estate operators.

Name

Duffie Inc

Legal name

Ralph J. Duffie, Inc.

Website

https://duffieinc.com

Company type

Private

Founded year

1953

Operating status

Operating

Headcount range

11–50 employees

Short description

Duffie Inc is a family-owned, vertically integrated real estate firm in Silver Spring, MD, providing development, construction, and asset management services for multifamily, commercial, and federal properties across the Washington DC Metro area.

Ownership category

akta.pro rank

Headquarters

HQ city

Silver Spring

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Real Estate Development: Full-service real estate development including acquisition, entitlements, and construction with focus on high performance, environmentally sensitive design. Revenue generated from development fees, property sales, and long-term ownership.
2. General Contracting (Consolidated Commercial Services): General contracting services for multi-family, commercial, and federal properties. Revenue from construction contracts, facility maintenance services including snow removal, painting, flooring, and excavating.
3. Property Management: Management of select properties within their own portfolio, as well as partnerships with other property owners. Revenue from management fees and value-added services.
4. Duffie Boatworks: Custom sportfish yacht design and construction. Industrial manufacturing facility with boat construction, carpentry, plumbing, and electrical departments.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels2 records

Core offering

Duffie Inc is a vertically integrated real estate firm providing full-service real estate development (acquisition, entitlements, and construction) with a focus on high-performance, environmentally sensitive buildings, primarily in the greater Washington, DC Metro area. The company also offers general contracting and facility maintenance through its Consolidated Commercial Services subsidiary and manages select portfolio properties. A separate subsidiary, Duffie Boatworks, designs and builds custom sportfish yachts.

Product overview

Duffie Companies is a family-owned real estate investment and development firm offering three core services: Real Estate Development (full-service acquisition, entitlements, and construction with focus on high-performance sustainable buildings), General Contracting through its Consolidated Commercial Services subsidiary (established 1993, serving DC Metro area), and Property Management of select portfolio properties. The company also operates Duffie Boatworks, an industrial manufacturing facility that designs custom sportfish yachts. The property portfolio includes nine properties across the DC Metro area: East of Market Apartments (209 units, Frederick, MD), Discovery Square (342 units, Herndon, VA), 455 at Tinner Hill (224 units + 50,000 sqft retail, Falls Church, VA), Hillandale Shopping Center (184,000 sqft retail), 10001 New Hampshire (55,000 sqft office, Silver Spring, MD), 322 Baldwin Apartments (212 units, Odenton, MD), The Alexander (276 units, 16-story high-rise, Alexandria, VA), and Duffie Boatworks (28,000 sqft manufacturing facility, Ocean City, MD). The company emphasizes long-term ownership, quality, durability, and sustainability with LEED-certified projects.

Differentiator

Problem solved

Functional benefit

Products and services

• Real Estate Development Full-service real estate development offering including acquisition, entitlements, and construction, with a focus on high-performance, environmentally sensitive design and long-term ownership philosophy. Targeted at real estate investors and property owners in the greater Washington, DC Metro area.
• Consolidated Commercial Services (General Contracting) Wholly-owned general contracting subsidiary serving the greater Washington, DC Metro area, providing multi-family, commercial, and federal property services including renovations, painting, flooring, excavating, snow/ice management, and 24-hour emergency services.
• Property Management Property management services for select properties within the Duffie portfolio and partnered with other property owners, including Class A, high-rise, garden style, tax credit, student housing, commercial, and senior living assets.
• Duffie Boatworks (Custom Sportfish Yacht Design and Construction) Custom sportfish yacht design and construction services delivered from a 28,000 sqft, 3-bay industrial facility with in-house carpentry, plumbing, and electrical departments. Targeted at high-net-worth clients and commercial buyers commissioning fully custom vessels.

Quantifiable outcome

• 2,000+ multifamily units delivered, 2,500+ units repositioned
• +3 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Five partnerships are on record, tiered minor.

• BozzutominorStrategic or Co-development PartnerPast property management partnership. Bozzuto is a real estate services company. Partnership reflects Duffie's approach of working with best-in-class partners who share long-term perspective and appreciate attention to quality and resilience.
• Perrontee, Inc.minorStrategic or Co-development PartnerPast property management partnership. Perrontee is a real estate firm. Partnership demonstrates Duffie's collaborative approach to property management.
• Housing Opportunities Commission of Montgomery CountyminorStrategic or Co-development PartnerPast property management partnership with government housing agency. HOCMC is the housing authority for Montgomery County, Maryland.
• Grady Management, Inc.minorStrategic or Co-development PartnerPast property management partnership. Grady Management is a real estate management company. Partnership reflects Duffie's value-added partner approach.
• The Halle CompaniesminorStrategic or Co-development PartnerPast property management partnership. The Halle Companies is a real estate firm. Partnership demonstrates Duffie's collaborative approach with like-minded real estate companies.

Scale indicators15 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• EYA: Washington, DC-area urban infill and multifamily developer with a focus on walkable, mixed-use neighborhoods — closely comparable to Duffie's Discovery Square, 455 at Tinner Hill, and East of Market projects.
• Donohoe Companies: Washington, DC-Metro vertically integrated real estate firm spanning development, construction (Donohoe Construction), and hospitality/residential management — a directly comparable multi-arm DC-area operator.
• Halle Companies: DC-area real estate development and investment firm; a prior Duffie partner and a comparable Mid-Atlantic multifamily/mixed-use operator focused on long-term ownership.
• Jarrett Bay Boatworks: North Carolina-based custom sportfishing yacht builder using a similar build-to-order, single-facility model; the most direct peer to the Duffie Boatworks subsidiary.
• The Bozzuto Group: Vertically integrated DC-area residential real estate firm doing development, construction, and property management of multifamily and mixed-use assets — a near-mirror of Duffie's model and a prior Duffie partnership counterparty (per select_customers list).
• Grady Management, Inc. DC-area property management firm serving multifamily and mixed-use properties; a prior Duffie property-management partner and directly comparable in asset-class focus and DC regional concentration.

Broad incumbents

• Wood Partners: National multifamily developer active across the Mid-Atlantic including the DC Metro area; competes for similar infill multifamily sites and renters and offers a benchmark for scaled platform valuations.
• Clark Enterprises: Large privately held Bethesda, MD-based parent of Clark Construction; develops, builds, and invests in commercial and residential real estate across DC Metro — overlapping with Duffie's development + general contracting footprint at a substantially larger scale.
• The JBG Smith Companies: NYSE-listed, Washington, DC-focused real estate investment and development company; operates, invests in, and develops multifamily and mixed-use properties directly comparable to Duffie's DC portfolio.

Regional players

• Perseus Property Services: DC-area commercial real estate services firm covering property management, maintenance, and janitorial work — overlapping with the Consolidated Commercial Services facility-maintenance franchise.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Subsidiaries2 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 Duffie Inc