Langstaff Day Architects

What Langstaff Day Architects does

Langstaff Day Architects (legal entity Langstaff Day Ltd., UK company 13892031) is a London-based RIBA chartered architectural practice founded in 2015 by Nicholas Langstaff and Joanna Day. The firm provides end-to-end architectural services across six stages — feasibility, concept design, planning, technical design, construction, and sustainable design — with in-house Passive House certification. Its portfolio is organised across five project categories: community, sports and leisure (most prominently work for The All England Lawn Tennis Club at Wimbledon, including the Media Pavilion and the 1,780 sqm Community Clubhouse), education (primary, secondary, tertiary), residential (via the LDA Homes sub-brand for private homes and a separate residential developments stream), workplaces, and a Nano-tecture category for small-scale experimental projects.

The practice's underlying technology is conventional architectural delivery augmented by BIM for technical coordination and PassivHaus principles (including low embodied carbon materials, SuDS, and timber structures such as CLT) embedded across projects. Differentiators include both partners' 10-year tenures at Nicholas Hare Architects on the Building Schools for the Future programme, Nicholas Langstaff's certified PassivHaus Designer status, and Joanna Day's academic roles at the Welsh School of Architecture and Loughborough School of Architecture.

Langstaff Day operates as a project-based professional services firm generating fee revenue from direct client engagements. Pricing is custom-quoted per project with no public rate card. Clients are a mix of one enterprise anchor (AELTC), education institutions and school federations (Colvestone Primary School, Harris Federation), and private residential clients (e.g. Corner House, Stoke Newington). The firm is privately held by its two founding partners, with no external investment, operates from a single London office (7 Cardigan Road, SW13 0BH), and has a stated headcount of 1–10 employees.

Name

Langstaff Day Architects

Legal name

Langstaff Day Ltd.

Website

https://langstaffday.co.uk

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

1–10 employees

Short description

Langstaff Day Architects is a London-based RIBA chartered architectural practice, founded in 2015 by Nicholas Langstaff and Joanna Day, delivering sustainable design services across community/sports/leisure (notably The All England Lawn Tennis Club), education, residential, and workplace projects.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industry

Space Planning & Workplace Design (BPAHAKAI)

Keywords

• Architectural design services
• Sustainable architecture
• Passive house design
• Education sector architecture
• Community sports facilities

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Architectural Services: Langstaff Day Architects generates revenue through providing architectural and design services across feasibility, concept, planning, technical design, and construction phases. The practice works on projects of varying scales from small residential extensions to large-scale community sports facilities. Revenue is project-based, derived from professional service fees for design and consultancy work.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Langstaff Day Architects is a RIBA chartered London architecture practice delivering professional architectural design services from feasibility and concept design through planning, technical design, and construction supervision. The firm specialises in community/sports/leisure venues, education facilities, residential projects, and workplaces, embedding sustainable design and in-house Passive House certification principles across all work.

Product overview

Langstaff Day Architects is a RIBA chartered architectural practice offering comprehensive architectural services from feasibility through to construction completion. The practice operates across six service areas: Feasibility, Concept Design, Planning, Technical Design, Construction, and Sustainable Design. The portfolio spans four project categories: Community/Sports/Leisure, Education, Residential (including LDA Homes and Residential Developments), and Workplaces, plus a Nano-tecture category for small-scale projects. The practice has in-house Passive House certification and specializes in sustainable, low-energy design.

Differentiator

Problem solved

Functional benefit

Products and services

• Feasibility Services
• Concept Design
• Planning Services
• Technical Design Services
• Construction Services
• Sustainable Design Sustainable design embedding including Passive House principles, fabric upgrades, SuDS integration, low embodied carbon materials, and low-energy timber structures. The practice holds in-house Passive House certification.

Named customers4 records

Segments3 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Two partnerships are on record, tiered minor.

• Meanwhile SpaceminorStrategic or Co-development PartnerLangstaff Day Architects worked in collaboration with Meanwhile Space on the Silvertown Flyover competition entry, proposing imaginative reuse of space under the existing flyover through a cost-effective repeatable flat pack module design with distinctive integrated light scoops.
• 7TH Design & InventionminorStrategic or Co-development PartnerCollaboration with 7TH Design & Invention on the Flexible Hotel Concept, focused on making hotels more accessible through architectural and product design collaboration. The partnership developed the 'SoundSpace' expanding partition with sound damping features.

Scale indicators1 record

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Stanton Williams: Established London practice with strong cultural, education, and residential portfolio and RIBA award pedigree. Larger and more institutional than Langstaff Day but overlaps on education and community typologies and design-led profile.
• Allies and Morrison: Large, established London architectural practice with extensive portfolio across education, residential, community, and masterplanning. Operates in the same sectors at greater scale; overlaps directly on education and community briefs but with significantly broader resources.

Direct peers

• Haworth Tompkins: London-based award-winning practice known for cultural, education, and community projects including theatre, schools, and leisure venues. Comparable portfolio emphasis on community/sports/leisure and education, with similar RIBA-recognised design quality at boutique scale.
• Jestico + Whiles: London-headquartered architectural practice of comparable mid-boutique size working across education, community, residential, and leisure sectors with a strong sustainability ethos. Directly comparable scale, client mix, and project-based fee model to Langstaff Day.
• Cullinan Studio: London practice renowned for sustainable, community-oriented architecture across education, housing, and public realm. Directly comparable on sustainability ethos, education sector work, and RIBA award recognition.
• Studio Egret West: Small London architectural practice focused on residential, community, and education projects with a strong sustainability and contextual design philosophy. Comparable boutique scale and horizontal sector segmentation.
• Featherstone Young: London housing and community-focused practice with expertise in Passivhaus and low-energy residential design. Comparable on sustainable residential specialisation and London boutique scale.
• Proctor & Matthews Architects: London practice with deep education sector pedigree, recognised for sustainable school design and community projects under the Building Schools for the Future era. Comparable niche specialisation and London-based, award-winning profile.
• Mikhail Riches: London-based Passivhaus and low-carbon architecture practice specialising in housing, education, and community projects. Highly comparable on Passive House specialisation, residential/community focus, and RIBA award profile.
• dRMM Architects: London-based architecture studio recognised for sustainability-led, timber-heavy, Passivhaus and CLT expertise across education, residential, and community projects. Closest direct peer on sustainability credentials and CLT/Passivhaus residential execution.

Market position

Strengths5 records

Weaknesses3 records

Competitive moat3 records

Key highlights5 records

Customer concentration

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• Pinterestpinterest.co.uk/LangstaffDay/_saved
• LinkedInlinkedin.com/company/langstaff-day-architects

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Langstaff Day Architects