Cornerstone Architects Limited

What Cornerstone Architects Limited does

Cornerstone Architects Limited is an independently owned architectural practice established in 1989 and headquartered at 79 Parliament Street in Ramsey, Isle of Man. The firm describes itself as the longest-established independently owned architectural practice on the island, operating for approximately 36 years under private, founder-controlled ownership with no external investors or parent entity disclosed. It is a small practice, with the headcount listed at five employees and an active hire for a Senior Architectural Technician underway at the time of data capture.

The firm delivers full architectural services across residential, commercial, healthcare, education, and public-sector projects on the Isle of Man. Its offering is organized around the RIBA Plan of Work framework and comprises four core service lines: Architectural Design Solutions, Interior Design, Planning and Advisory Services, and Project Delivery and Construction Management. Notable recent and historical projects include the Ballagawne barn conversion (2013), The Shore Hotel Laxey extension and refurbishment (2023), the Summerhill View care home new build (2024), Douglas Offices commercial refurbishment (2024), Ballachrink residential extension (2025), and the forward-dated No. 5 residential extension (2026). The practice is RIBA Chartered, ARB registered, and an APM member, signaling compliance with UK architectural regulatory standards despite its Isle of Man domicile.

Revenue is generated through professional service fees on a project basis, typically itemized against RIBA stages and offered as full or part-service engagement. The go-to-market is sales-led and direct: the practice engages clients locally, supported by a portfolio-driven website and Facebook presence for top-of-funnel visibility. Revenue figures are not publicly disclosed. There are no reported funding rounds, acquisitions, subsidiaries, or external partnerships, and operating geographies are confined to the Isle of Man.

Name

Cornerstone Architects Limited

Legal name

Cornerstone Architects

Website

https://csarc.im

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

1–10 employees

Short description

Cornerstone Architects Limited is an independently owned, RIBA-chartered architectural practice on the Isle of Man, founded in 1989. It delivers full architectural, interior, planning, and project management services to residential, commercial, healthcare, education, and public-sector clients locally.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Interior Design Services (54141)

akta.pro industry

PRIMARYBPAHAKAA

Architectural Design Services

Business & Public Services/Professional Services (Legal, Accounting, Consulting)/Architecture, Design & Planning Services

SECONDARYBPAHAKAB

Interior Design Services

Business & Public Services/Professional Services (Legal, Accounting, Consulting)/Architecture, Design & Planning Services

Keywords

• Architectural design services
• Residential architecture
• Commercial architecture
• Planning advisory
• Construction project management

Headquarters

HQ city

Ramsey

HQ country

Isle of Man

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Architectural Services: Professional architectural services delivered across RIBA Plan of Work stages. Services include design, planning, technical drawings, construction oversight, and project management. Fees are calculated based on project brief and scope, typically presented as a 'shopping list' allowing clients flexibility for full or part service engagement.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Cornerstone Architects Limited delivers professional architectural design and project delivery services on the Isle of Man. The practice provides end-to-end architectural services including design, interior design, planning submission and advisory work, and construction oversight, structured around the RIBA Plan of Work framework. Projects span residential extensions and new builds, commercial refurbishments, care homes, hotels, and educational facilities.

Product overview

Cornerstone Architects offers a unified suite of architectural services rather than a modular software product. The core offering comprises Architectural Design Solutions, Interior Design, Planning and Advisory Services, and Project Delivery and Construction Management. These services are delivered through a structured RIBA Plan of Work framework spanning eight stages from strategic definition through post-occupancy, providing clients with a comprehensive end-to-end architectural service tailored to residential, commercial, and educational projects on the Isle of Man.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectural Design Solutions
• Interior Design
• Planning and Advisory Services
• Project Delivery and Construction Management

Quantifiable outcome

• Successful completion of diverse projects including care homes, commercial refurbishments, residential extensions, and heritage conversions

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Allies and Morrison: UK-based architectural practice working across residential, commercial, education and heritage projects. Comparable to Cornerstone in offering RIBA-aligned full-service design and operating at a larger scale across multiple sectors.
• BDP (Building Design Partnership): Large UK-based interdisciplinary design practice with strong healthcare, education and commercial portfolios. Comparable to Cornerstone at the sector level but operates at significantly larger scale and geographic reach.
• Allford Hall Monaghan Morris (AHMM): Mid-size UK architectural practice delivering commercial, healthcare, education and residential projects. Comparable to Cornerstone in sector breadth and full RIBA-stage service delivery, but at materially larger scale.
• John McAslan + Partners: UK architectural practice working across heritage, education, commercial and residential sectors. Comparable to Cornerstone in sector breadth and emphasis on sensitive refurbishment and adaptive reuse projects.
• Foster + Partners: Global architectural practice with a UK heritage and a portfolio spanning commercial, residential, hospitality and public projects. Comparable to Cornerstone only at a broad sector level, but serves as a useful reference point for premium design-led architectural services.
• Stride Treglown: UK architectural practice with significant healthcare, education, commercial and residential portfolios. Comparable to Cornerstone in delivering public-facing sector projects through RIBA-aligned service stages.
• Levitt Bernstein: UK architectural practice with strong residential, education and public sector portfolios. Comparable to Cornerstone's mix of residential, education and community work, and its use of end-to-end design and planning services.

Direct peers

• EPR Architects: UK architectural practice with a strong heritage and refurbishment focus across commercial, residential and hospitality projects. Closely comparable to Cornerstone's renovation and adaptive reuse work.
• Formation Architects: UK architectural practice focused on residential, commercial and mixed-use projects with strong refurbishment expertise. Comparable to Cornerstone in delivering design-led, locally rooted projects across multiple sectors.
• Purcell: UK architectural practice with a strong heritage, conservation and refurbishment focus. Directly comparable to Cornerstone's renovation, extension and barn conversion work, especially in heritage-sensitive contexts.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/Cornerstone-Architects-100057099637938
• LinkedInlinkedin.com/company/cornerstone-architects-limited

Compliance3 records

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 Cornerstone Architects Limited