Stephenson & Turner

What Stephenson & Turner does

Stephenson & Turner is a New Zealand-headquartered architecture and design firm founded in 1956 by Arthur Stephenson. The firm provides architecture, engineering, interior design, and sustainable design services, with project work spanning heritage conservation, residential, and commercial commissions across New Zealand. It operates under the collective brand 'The S&T Group,' with a regional headquarters in Wellington and a general office in Auckland, alongside a related design studio entity, Co-Studio, that extends the group's design capabilities.

The firm operates a traditional professional services model: revenue is generated through project-based fees on architectural and design commissions rather than disclosed product or SaaS pricing. Its service mix — heritage restoration, residential, and commercial architecture, with sustainable design as an additional vertical — positions it across both public/cultural and private sector demand in New Zealand. The 101-250 employee range and dual-city presence indicate a mid-sized practice with the scale to pursue larger commercial and heritage mandates while maintaining multi-disciplinary capability in-house.

No parent company, external ownership, or public listing is indicated; the firm appears to operate as an independent private practice. Public information on financial performance, customer concentration, headcount trends, technology stack, AI/ML capabilities, pricing, and marketing channels is not disclosed in the available source data, limiting deeper operational visibility. Key analytical gaps include undisclosed revenue, no customer logos, no leadership team beyond the founder, and no dated strategic activity signals.

Name

Stephenson & Turner

Legal name

Stephenson & Turner

Website

https://stephensonturner.com

Company type

Private

Founded year

1956

Operating status

Operating

Headcount range

11–50 employees

Short description

Stephenson & Turner is a New Zealand architecture and design firm founded in 1956, delivering architecture, engineering, interior, and sustainable design services across heritage, residential, and commercial sectors from its Wellington HQ and Auckland office under The S&T Group.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Architectural Services (541310), Architectural, Engineering, and Related Services (5413), Engineering Services (54133)

akta.pro primary industry

Historic Preservation & Conservation Planning (BPAHAKAH)

Keywords

• Architectural services
• Heritage restoration
• Sustainable design
• Interior design
• Commercial architecture

Headquarters

HQ city

Wellington

HQ country

New Zealand

HQ region

Oceania

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales

Core offering

Stephenson & Turner is an architecture firm providing design and architectural services across New Zealand, operating multiple studios (S&T Wellington, S&T Auckland, and Co-Studio) under The S&T Group umbrella. Projects span heritage conservation, residential housing, and commercial architecture, delivered through regional offices in Wellington and Auckland.

Product overview

Stephenson & Turner is an architecture firm providing design and architectural services. The company operates across multiple locations in New Zealand (Wellington, Auckland) under the S&T Group umbrella, including subsidiary brands like Co-Studio. Projects span heritage conservation, residential housing, and commercial architecture.

Differentiator

Problem solved

Functional benefit

Products and services

• Architecture and Design Services
• Heritage Restoration Services
• Sustainable Design Services
• Interior Design Services

Ideal customer profiles2 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.

• Co-StudiocoreOthersCo-Studio is listed as part of The S&T Group alongside S&T Wellington and S&T Auckland. It appears to be a related design studio entity within the group structure.

Expansion highlights3 records

Broad incumbents

• Arup: Global engineering and design firm with NZ presence delivering structural, mechanical, and integrated design services — comparable on the engineering and sustainable design side of Stephenson & Turner's offering.
• HASSELL: International architecture and design practice with studios across APAC delivering architecture, interior and urban design — comparable offering and increasingly active in the NZ/Australian institutional market.
• BECA Group: One of the largest NZ-headquartered professional services firms offering architecture alongside engineering, planning and advisory — broader portfolio than Stephenson & Turner but competing for the same institutional design commissions.

Others

• Woods Bagot:

Direct peers

• Athfield Architects: Established New Zealand architecture practice known for residential, commercial and heritage work, based in Auckland — comparable in scale, NZ geography, and project typologies.
• Warren and Mahoney: Large New Zealand architecture practice with offices in multiple cities offering architecture, interior, and urban design services across commercial, residential and heritage sectors — directly comparable in scale, geography, and discipline mix to Stephenson & Turner.
• Architectus: Trans-Tasman architecture and design practice with NZ presence, providing architecture, urban design and interior services — comparable multi-disciplinary design model serving similar institutional clients.
• Jasmax: New Zealand architecture and design firm (now part of Warren and Mahoney) with offices across NZ providing architecture, interior, and sustainable design services — closely comparable in offering and NZ market footprint.

Regional players

• Context Architects: Christchurch-based NZ architecture practice with heritage, commercial and residential experience — comparable regional NZ design firm competing for similar briefs in the South Island market.

Emerging players

• Jensen Architects: Smaller NZ architecture studio focused on residential and select commercial design — comparable practice type and NZ market presence but at a smaller scale than Stephenson & Turner.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/s_andt_

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries3 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 Stephenson & Turner