Julian Harrap Architects LLP

What Julian Harrap Architects LLP does

Julian Harrap Architects LLP (JHA) is a London-based specialist architectural practice founded in 1973, focused on the conservation, repair and restoration of historic buildings, estates and landscapes, alongside the design of extensions and new buildings within historic settings. Operating as a partner-owned Limited Liability Partnership with approximately 10 employees, the firm serves institutional, public sector, ecclesiastical, commercial and private clients — including the National Trust, City of London Corporation, Historic England, Royal Botanic Gardens Kew, Royal Academy of Arts, Museum of London, and Sir John Soane's Museum — through direct professional services commissions, competitive international design competitions, and grant-funded conservation programmes.

The firm's technical offering centres on full architectural services spanning quinquennial surveys, conservation management planning, phased repair programmes, masterplanning for heritage sites, and the design of discreet modern interventions within historic fabric. JHA's approach combines academic research, stylistic understanding and traditional craftsmanship with 21st century structural and surveying technology, evidenced by specialist solutions such as tubular steel truss reinforcement of historic plaster ceilings at St Anne's Limehouse, listed building re-designation strategy at the Farnborough Wind Tunnels, and the conservation of rare Phoenix Columns and the rediscovered Lockhart Cocoa Rooms at Smithfield Market. Products are organised across service categories including museum/cultural institution architecture, ecclesiastical restoration, residential historic property services, commercial heritage conservation, industrial/aviation heritage, and garden and landscape conservation.

Revenue is generated entirely through professional services fees negotiated on a project-by-project basis, with no publicly disclosed pricing. Work is acquired through competitive tendering, repeat institutional relationships (e.g., Sir John Soane's Museum since the early 1990s), and winning international design competitions as part of consortia with practices such as David Chipperfield Architects, Stanton Williams, Asif Khan Ltd, and Happel Cornelisse Verhoeven. The practice operates primarily in the United Kingdom with international projects in Germany (Neues Museum Berlin), the Netherlands (Museum de Lakenhal Leiden), and Belgium (De Bourla Theatre Antwerp), and has accumulated a substantial portfolio of RIBA, RICS, Mies van der Rohe, and European Union heritage awards spanning more than three decades.

Name

Julian Harrap Architects LLP

Legal name

Julian Harrap Architects LLP

Website

https://julianharraparchitects.co.uk

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

1–10 employees

Short description

Julian Harrap Architects LLP is a London-based specialist architectural practice founded in 1973 providing conservation, restoration and masterplanning services for historic buildings, estates and landscapes, serving institutional, public sector, ecclesiastical, commercial and private heritage clients across the UK and Europe.

Ownership category

akta.pro rank

Product category

Heritage Architecture and Conservation Services

NAICS

Architectural Services (541310)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industry

Historic Preservation & Conservation Planning (BPAHAKAH)

Keywords

• Historic building conservation
• Architectural restoration services
• Heritage architecture practice
• Listed building consultancy
• Museum conservation architecture

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, Infrastructure, Technology or R&D, Others

Revenue model

1. Architectural Services - Conservation and Restoration: JHA provides full architectural services for the repair and restoration of historic buildings, estates and landscapes, and for the design of extensions and new buildings in historic settings. Revenue is generated entirely through professional services fees from clients including institutional bodies (National Trust, City of London Corporation), public sector organisations, and private clients. Work is supported by grant-giving agencies.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Julian Harrap Architects LLP provides specialist architectural services for the conservation, repair, and restoration of historic buildings, estates, and landscapes. The practice also designs extensions and new buildings within historic settings, applying consistent design philosophy across both new build and restoration work. Services span quinquennial surveys, conservation management planning, phased repair programmes, and full project delivery for ecclesiastical, museum, civic, residential, commercial, and industrial heritage projects across the UK and Europe.

Product overview

Julian Harrap Architects LLP is a distinguished medium-sized architecture practice established in 1973, offering specialist professional services for historic building conservation and restoration. The practice provides a comprehensive range of architectural services including quinquennial inspections, conservation management planning, repair and restoration of historic structures, and design of new buildings within historic settings. Their portfolio spans ecclesiastical buildings, museums and cultural institutions, residential historic properties, commercial heritage buildings, and industrial heritage sites. The practice works across UK and international projects, collaborating with institutions such as the National Trust, Historic England, and various municipal clients. Services are delivered through dedicated teams of trained architects applying academic research and stylistic understanding to each project, combining traditional craftsmanship with contemporary technology.

Differentiator

Problem solved

Functional benefit

Products and services

• Historic Building Conservation and Restoration Services Full-range architectural services for the repair and restoration of historic buildings, estates, and landscapes, including quinquennial surveys, conservation management plans, and phased repair programmes. For institutional, public sector, ecclesiastical, and private clients with listed historic assets.
• New Building Design in Historic Settings Design of extensions and new buildings within historic settings, maintaining architectural compatibility while employing contemporary approaches and 21st century technology. For institutional, public sector, and private clients requiring sympathetic new build interventions within heritage contexts.
• Masterplanning and Conservation Management Planning Services Strategic planning services for heritage sites, including conservation frameworks, significance assessments, and phased development proposals. For heritage bodies and institutional clients managing complex historic estates.
• Museum and Cultural Institution Architecture Conservation and transformation of museums and cultural institutions, including the Museum of London Smithfield Market, Neues Museum Berlin, Museum De Lakenhal, and Royal Academy of Arts projects. For museums, galleries, and cultural charities requiring specialist heritage conservation.
• Ecclesiastical Architecture Services Inspection, repair, and restoration of churches including St John the Baptist (Pinner), St Dunstan & All Saints, St Anne's Limehouse, and St Lawrence Jewry. For Parochial Church Councils, dioceses, and ecclesiastical bodies with listed places of worship.
• Residential Historic Property Services

Quantifiable outcome

• Over 40 years of continuous operation and numerous national and international awards since inception
• +3 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• Happel Cornelisse VerhoevencoreStrategic or Co-development Partner · 1 January 2013JHA with Rotterdam practice Happel Cornelisse Verhoeven won a competition in 2013 to restore and extend Museum de Lakenhal in Leiden. The new wing provides space for temporary exhibitions while the permanent collection is housed in the restored Lakenhal. The museum was re-opened by King Willem-Alexander in June 2019.
• David Chipperfield ArchitectscoreStrategic or Co-development PartnerJHA won the international competition to restore and rebuild the Neues Museum in Berlin in collaboration with David Chipperfield Architects. JHA acted as conservation architects establishing the architectural and conservation framework while David Chipperfield led the overall design. The project resulted in over 20 major awards.
• David Chipperfield ArchitectscoreStrategic or Co-development PartnerJHA was appointed with David Chipperfield Architects to prepare a masterplan of the complete site at 6 Burlington Gardens for the Royal Academy of Arts. The scheme involved re-introduction of a new lecture theatre, conversion of laboratories into galleries, and creation of a link between Burlington Gardens and Burlington House.
• Asif Khan LtdcoreStrategic or Co-development PartnerIn 2016, JHA with Asif Khan Ltd and Stanton Williams won an international competition to relocate the Museum of London to the Smithfield Market site. JHA's role across the approximately £340 million project is pivotal to the success of the redevelopment.
• Stanton WilliamscoreStrategic or Co-development PartnerJHA with Asif Khan Ltd and Stanton Williams won the international competition for the Museum of London Smithfield redevelopment. Stanton Williams leads the fitout of the Fish Market and Red House buildings, while JHA leads external restoration.
• Farnborough Air Sciences Trust (FAST)minorStrategic or Co-development PartnerAt the Farnborough Wind Tunnels project, JHA acted as an intermediary between Segro and the Farnborough Air Sciences Trust (FAST), a group of aviation history enthusiasts, to secure a successful scheme that satisfied all parties.
• PAYE Stone and RestorationminorImplementation/ SI/ Consulting PartnerPAYE Stone and Restoration completed the repair work to the Portland stone elements at Elizabeth Gate, Kew Gardens, including indent repairs using matching Portland stone and plastic repairs employing hydraulic lime and stone dust mortar.
• DRDH ArchitectsminorStrategic or Co-development PartnerJHA, in collaboration with lead consultant DRDH Architects, was commissioned by Toneelhuis and the City of Antwerp to prepare a conservation management plan for the De Bourla Theatre in Antwerp.
• Eva Jiricna ArchitectsminorStrategic or Co-development PartnerJHA collaborated closely with Eva Jiricna Architects who designed an ambitious new steel and glass extension in the 20m long garden of the Ebury Street project, with JHA balancing the needs of restoring the historic building with demands of modern living.
• GenslerminorImplementation/ SI/ Consulting PartnerJHA was appointed by lead architect Gensler to act as consultant conservation architect for the complex refurbishment of Bedford Chambers into an Apple Store in Covent Garden. JHA provided consultancy advice for works affecting the historic fabric.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Mole Architects: UK practice with relevant heritage and contextual new-build work; overlaps with JHA on residential and ecclesiastical historic settings.
• Purcell Architects: UK heritage and conservation architecture practice with a strong portfolio of listed-building restorations and museum/cultural-sector projects. Directly competes with JHA for institutional heritage commissions.
• Feilden+Mawson: UK practice active in heritage, ecclesiastical, and cultural architecture, often overlapping JHA on church and institutional restoration briefs.
• David Chipperfield Architects: Long-standing JHA collaborator on the Neues Museum Berlin and 6 Burlington Gardens; operates as a leading international practice with significant historic-conservation portfolio.
• Donald Insall Associates: Long-established UK conservation architecture practice specialising in repair and restoration of historic buildings across cultural, ecclesiastical, and public sectors. Highly comparable to JHA in mission, client base, and project types.
• Asif Khan Ltd: JHA's partner on the Museum of London Smithfield competition; comparable in working at the intersection of contemporary architecture and historic context.
• Caruso St John Architects: Award-winning UK practice with significant heritage and museum work. Directly comparable to JHA in combining sensitive historic restoration with contemporary new-build design.
• Stanton Williams: UK architectural practice partnered with JHA on Museum of London Smithfield; comparable in cultural-sector heritage work and museum redevelopments.

Regional players

• Studio Indigo: UK-based architectural practice with notable heritage and listed-building restoration projects; overlaps with JHA on residential and commercial heritage briefs.

Broad incumbents

• John McAslan + Partners: Larger UK architectural firm with heritage and cultural-sector projects including conservation-led redevelopments; broader portfolio but competes for some of the same institutional briefs.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/julianharraparchitects
• LinkedInlinkedin.com/company/julian-harrap-architects-llp

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Julian Harrap Architects LLP