Jeff Day and Associates

Name

Jeff Day and Associates

Legal name

Jeff Day LLC

Website

https://jeffdayllc.com

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Architectural, Engineering, and Related Services (5413), Interior Design Services (541410)

akta.pro primary industry

Building Information Modeling (BIM) & Digital Design Services (BPAHAKAK)

akta.pro secondary industries

Sustainable/Green Building & LEED Consulting (BPAHAKAG), Residential Design-Build & Renovation-Integrated Builders (IMAFABAE)

Keywords

• Architectural design services
• Residential architecture
• Commercial architecture
• Home remodeling design
• Sustainable building design

Headquarters

HQ city

Manchester

HQ country

United Kingdom

HQ region

Europe

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales

Revenue model

1. Architecture and Design Services: The company generates revenue through professional architecture and design services for residential homes, additions, remodeling projects, and commercial spaces including new construction and tenant build-out.

Go-to-market motion1 record

Distribution channels1 record

Core offering

Jeff Day LLC is an architectural design firm providing custom residential architecture services (new homes, additions, remodeling) and commercial design services (new construction and tenant build-out for retail, restaurant, industrial, and institutional environments). The firm employs architects and engineers who work collaboratively with homeowners, contractors, and commercial builders to deliver projects emphasizing energy efficiency and environmentally sustainable materials and methods.

Differentiator

Problem solved

Functional benefit

Brands

• Jeff Day Homes: Residential design practice specializing in homes, additions, and remodeling projects
• Jeff Day Commercial

Products and services

• Jeff Day Homes (Residential Design) Residential architectural and design services specializing in custom homes, additions, and remodeling projects. The practice emphasizes energy efficiency and environmentally sustainable materials and building methods, working collaboratively with homeowners and their contractors.
• Jeff Day Commercial Commercial architectural design services for new construction and tenant build-out, focused on creating inviting environments for retail, restaurant, industrial, and institutional clients. Designers work with clients and their builders to deliver spaces tailored to each commercial purpose.

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Broad incumbents

• Gensler: The largest global architecture/design practice, with substantial commercial build-out (retail, restaurant, workplace) — comparable on Jeff Day Commercial's retail/foodservice/industrial use cases at much larger scale.
• Perkins&Will: A global architecture firm long associated with LEED and sustainable design leadership across commercial, institutional, and mixed-use sectors — comparable overlap on commercial build-out and sustainability, though operating at much greater scale.
• Foster + Partners: A globally recognized, sustainability-focused architecture firm working across commercial, residential, and institutional projects — comparable in studio model and design-led commercial/residential mix at far greater scale.
• ZGF Architects: A larger US architecture firm with deep sustainability credentials and broad work across commercial, institutional, and residential developments — comparable in design services and green-building positioning but operating at significantly greater scale.
• CannonDesign: A national architecture practice with integrated design across institutional, commercial, and residential work — comparable service breadth but larger footprint and broader geographic reach than Jeff Day.

Direct peers

• KieranTimberlake: A design practice widely recognized for pioneering sustainable, high-performance building across residential, commercial, and institutional projects — closely comparable in sustainability-driven design philosophy to Jeff Day's stated differentiator.
• Robert A.M. Stern Architects: A residential-and-commercial architecture firm known for classic-to-traditional design range — comparable to Jeff Day's stylistic spectrum from classic to contemporary.
• Lake|Flato Architects: A mid-sized US architecture firm with strong residential and small-scale commercial practices and a recognized emphasis on sustainability and contextual design — directly comparable in service mix, scale, and green-building focus to Jeff Day and Associates.
• Bohlin Cywinski Jackson: A mid-size firm known for high-craft residential, commercial, and institutional projects with an emphasis on sustainability and site-responsive design — highly comparable to Jeff Day's residential-plus-commercial, sustainability-forward approach.
• Olson Kundig: A design-build-aligned firm specializing in custom residential architecture with growing commercial and hospitality work — comparable business model (design-led, custom residential) and stylistic range to Jeff Day Homes.

Market position

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

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 Jeff Day and Associates