Haines Phillips Architects

What Haines Phillips Architects does

Haines Phillips Architects is a London-based, RIBA Chartered architectural practice formed in 2007 through the amalgamation of two award-winning predecessor firms, Andrews Downie and Partners and Knight Phillips Architects. The firm is structured as a private limited company, partner-owned, and led by four partners (Maha Phillips, Paul Lofthouse, Piers Carlisle, and George Evennett) supported by a small team of architectural staff, with the two founding partners retained as consultants. It delivers a unified suite of professional services — Concept & Feasibility Design, Planning & Listed Building Applications, Full Architectural Services across RIBA Plan of Work stages, and in-house Architectural Interiors — billed on a per-project fee basis following a free initial on-site consultation and a tailored fee proposal.

The practice's core competency is the navigation of complex planning, listed building consent, and conservation constraints, with particular strength in heritage-sensitive interventions (Grade I and II listed buildings, subterranean developments, and conservation-area refurbishments) alongside high-end residential and developer-led schemes. It serves a diversified client base spanning private high-net-worth residential clients in prime London locations, commercial and affordable-housing developers (including Haig Housing Trust, Crown Simmons Housing, Redrow, Stack, Beechcroft), cultural and heritage institutions (notably The Handel House Trust for Handel Hendrix House, and RADA), and social housing providers. The technology stack is entirely conventional: industry-standard design and 3D modelling tools, with no proprietary platform, no disclosed AI/ML capability, and no software product surface.

The go-to-market is relationship-driven direct sales. Lead generation relies on word-of-mouth and repeat engagement from a cumulative base of 500+ clients since 2007, supplemented by an Instagram content presence, a website Insights blog, a Q1 2025 newsletter, earned media (e.g. coverage of Handel Hendrix House in The Guardian, BBC, Blueprint), and exhibiting at the Listed Property Show (Stand G7, 2026). Geographic reach is concentrated in London and the South East — with particular depth in Kensington & Chelsea, Westminster, and north London — but projects have been delivered from Land's End to John O'Groats. The firm is privately held with no external institutional investment, no parent company, and no subsidiaries.

Name

Haines Phillips Architects

Legal name

Haines Phillips Architects

Website

https://hainesphillips.co.uk

Company type

Private

Founded year

2007

Operating status

Operating

Headcount range

1–10 employees

Short description

Haines Phillips Architects is a London-based RIBA Chartered architectural practice delivering full architectural services — concept design, planning and listed building consents, project delivery, and architectural interiors — to private residential clients, residential developers, cultural and heritage trusts, and housing associations across London and the South East.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (541310), Architectural Services (54131), Interior Design Services (54141), Interior Design Services (541410)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industry

Interior Design Services (BPAHAKAB)

Keywords

• Architectural services
• Residential architecture
• Heritage conservation
• Planning applications
• Architectural interiors

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, Others

Revenue model

1. Architectural Services: Fees for architectural services rendered on a per-project basis across concept, planning, technical design, construction administration, and project management stages. Services span residential (private and developer), commercial, mixed-use, heritage, and cultural projects.
2. Architectural Interiors: In-house architectural interiors service covering design and specification of internal fit-outs, finishes, joinery, kitchens, bathrooms, and lighting, billed as part of overall project fees.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Haines Phillips Architects is a RIBA Chartered architectural practice providing full architectural services from concept through to construction completion, following the RIBA Plan of Work across concept, planning, technical design, tendering, and contract administration stages. The practice is particularly known for heritage, conservation, and listed building work, and for high-end residential projects in London. Services are delivered alongside an in-house architectural interiors capability covering internal fit-outs, finishes, joinery, kitchens, bathrooms, and lighting.

Product overview

Haines Phillips Architects is a RIBA Chartered architectural practice offering a unified suite of professional services rather than a software product. Their core service portfolio consists of four interconnected offerings: Concept & Feasibility Design (initial site assessment and brief development), Planning & Listed Building Applications (securing consents for complex heritage projects), Full Architectural Services (comprehensive design-to-completion project delivery), and Architectural Interiors (specialist internal fit-out and specification). These services are typically engaged together as part of a complete project engagement, with the Full Architectural Services serving as the primary umbrella under which the other services are delivered.

Differentiator

Problem solved

Functional benefit

Products and services

• Concept & Feasibility Design
• Planning & Listed Building Applications
• Full Architectural Services
• Architectural Interiors

Quantifiable outcome

• Over 500 clients served since founding in 2007

Named customers8 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Nine partnerships are on record, tiered supporting and core.

• Michael Barclay PartnershipsupportingImplementation/ SI/ Consulting PartnerStructural engineering consultancy providing structural engineering services on residential extension and refurbishment projects.
• Finepoint GlasssupportingImplementation/ SI/ Consulting PartnerArchitectural glazing specialist providing specialist glazing solutions on residential projects.
• Portrait PoolssupportingImplementation/ SI/ Consulting PartnerPool contractor engaged for the Holland Park subterranean swimming pool project — a technically complex moving-floor pool installation.
• Desertoak LimitedsupportingImplementation/ SI/ Consulting PartnerMain contractor for the Handel Hendrix House project, undertaking the extensive listed building works to enable public access.
• Broseley London LtdsupportingImplementation/ SI/ Consulting PartnerMain contractor for the Brunswick Gardens renovation project, a high-end residential refurbishment in Kensington & Chelsea.
• Broadland ConstructionsupportingImplementation/ SI/ Consulting PartnerMain contractor for the Holland Street Extension and Refurbishment project in Kensington.
• Studio FaegersupportingImplementation/ SI/ Consulting PartnerInterior designer engaged by the client for the Holland Street project. HPA worked closely with Studio Faeger to coordinate finishes and fixtures.
• Realtime (AV Specialist)supportingImplementation/ SI/ Consulting PartnerAudio-visual specialist providing integrated technology solutions for high-end residential interiors, such as the Upper Brook Street Mayfair project.
• Quinn London LimitedcoreImplementation/ SI/ Consulting PartnerPrincipal contractor and design manager for the Brunel Engine Shed Grade II heritage restoration and extension project in High Wycombe. HPA was appointed as Design Manager by Quinn London to oversee design coordination.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Levitt Bernstein: London RIBA-chartered practice working across residential, social housing and heritage/retrofit projects — overlapping client base (housing associations, private developers) and similar listed-building capability.
• Haworth Tompkins: London architectural practice with overlapping residential, cultural and heritage portfolios, known for award-winning work in conservation-sensitive contexts — directly comparable client mix and project typology.
• Karakusevic Carson Architects: London practice recognised for social/affordable housing and residential projects — directly comparable for HPA's housing-association and affordable-housing engagements (Haig Housing, Crown Simmons).
• Proctor & Matthews: UK practice with a comparable focus on residential-led, mixed-use and heritage-sensitive schemes for both developers and private clients — similar typology and planning-led approach.
• Purcell: UK architectural practice with deep specialism in heritage, conservation and listed-building projects across residential, cultural and civic sectors — the closest comparator to HPA's Grade I/II heritage workstream.
• Pollard Thomas Edwards: London-based practice with strong overlap in residential new-build, refurbishment, housing association and mixed-use schemes — competes for similar developer and housing-association briefs.
• EPR Architects: London practice covering residential, heritage and cultural projects with comparable listed-building expertise — competes in the same planning-consent-heavy, conservation-area segment.
• Allies and Morrison: Central London RIBA-chartered practice with comparable breadth across residential, mixed-use, heritage and cultural projects, serving both private clients and institutional/developer customers.

Emerging players

• Feilden Fowles: Younger UK practice winning award-winning residential, cultural and heritage-adjacent projects — partial overlap with HPA's heritage/residential segment though focused more on new-build than refurbishment.

Broad incumbents

• John McAslan + Partners: Larger London practice with heritage, cultural and residential projects (including major listed-building refurbishments) — broader portfolio and greater scale than HPA, but overlapping on the conservation-and-residential value proposition.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/hainesphillips
• Xx.com/hainesphillips

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 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 Haines Phillips Architects