What PTA does

PTA (Powell Tolner & Associates Limited), founded in 1970 and headquartered in Chesham, Buckinghamshire, is a privately held UK civil and structural engineering design consultancy. The firm operates with approximately 50 staff and serves enterprise customers across property development, housing associations, industrial/logistics, education, and hospitality sectors. Its core offering is professional engineering design services, augmented by temporary works design, BIM modelling and clash detection (using Autodesk Revit, Civil 3D, and Navisworks), drainage and SuDS design, and sustainable/low-carbon structural design. The business delivers value-engineered solutions — documented savings include £2M on Ruskin Square, £500K on The Residence Nine Elms, and flat slab reinforcement rates under 27-30kg/m² across multiple projects — that compete primarily on technical ingenuity and reliability rather than scale.

The firm's revenue model is professional services fees charged on a project basis, with no standardised public pricing and individual project construction values ranging from £2M to £400M. PTA acquires clients through direct engagement with enterprise UK developers, contractors, and architects, supported by framework agreements (Chancerygate, Crest Nicholson), industry events (MIPIM Cannes), awards (Berkeley Capital Supply Chain Award 2022), and a strong repeat-business culture. The customer base is dominated by major UK housebuilders and developers including Berkeley Homes, St James Group, St William Homes, Bellway, Barratt London, Telford Homes, and industry occupiers such as UPS, Eddie Stobart, and B&Q.

Operationally, PTA is founder-originated (Trevor James Powell, 1970), remains independently owned, and is governed by Managing Director Simon Barratt and Board Director Alex Herman. Its geographic footprint is UK-domestic with active projects across London, the Southeast, Northwest England, Southampton, and the Midlands. Turnover is stated to have grown 280-fold since founding, and the company celebrated its 50th anniversary in 2020 with ongoing multi-phase project deliveries extending into 2024-2025.

Name

PTA

Legal name

Powell Tolner & Associates Limited

Website

https://ptaconsult.co.uk

Company type

Private

Founded year

1970

Operating status

Operating

Headcount range

11–50 employees

Short description

PTA is a UK-based civil and structural engineering design consultancy, founded in 1970 in Chesham, that delivers BIM-enabled design, temporary works, and value-engineering services to property developers, contractors, housing associations, and industrial occupiers across the UK.

Ownership category

akta.pro rank

Product category

Structural and Civil Engineering Consulting

NAICS

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

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

Keywords

• Structural engineering design
• Civil engineering consulting
• BIM services
• Temporary works design
• Construction consultancy

Headquarters

HQ city

Chesham

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consultancy Fees: PTA generates revenue through professional service fees charged for civil and structural engineering design services on construction projects. Work is delivered to developers, housing associations, contractors, architects, and quantity surveyors. The firm emphasises repeat business from clients who trust and rely on their high level of service.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

PTA is a UK civil and structural engineering design consultancy delivering structural engineering, civil engineering, temporary works, BIM (Building Information Modelling), and value engineering services for construction projects. Projects span residential, commercial, industrial/warehouse, mixed-use, hotel, and education developments, primarily across England with a London and South East concentration. Clients include major UK developers, housing associations, contractors, architects, and surveyors, served through direct engagement rather than resellers.

Product overview

PTA (Powell Tolner & Associates Ltd) is a civil and structural engineering consultancy founded in 1970, based in Chesham, Buckinghamshire, UK. The company does not offer a product-based portfolio but instead provides engineering consultancy services including structural engineering design, civil engineering design, temporary works design, BIM (Building Information Modelling) services, and sustainability/green design consulting. These services are applied across various construction project types including residential developments (apartments, houses), commercial buildings, industrial/warehouse facilities, mixed-use developments, hotels, and educational facilities. PTA serves clients such as developers, housing associations, contractors, architects, and quantity surveyors.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering Design Professional structural engineering design consultancy for residential, commercial, and industrial construction projects, including high-rise RC frame design, foundation engineering, and design for complex sites such as gas works, tunnels, and listed buildings. Delivered to property developers, contractors, architects, and surveyors across the UK.
• Civil Engineering Design Civil engineering design services covering drainage and SuDS (sustainable urban drainage systems), highways, service yards, earthworks, and site infrastructure for residential, commercial, industrial, and mixed-use developments. Delivered alongside structural design for property developers and contractors.
• Temporary Works Design Specialist temporary works engineering design for residential developments and complex construction projects, delivered to housing developers and main contractors. Includes advice on buildability, programme acceleration, and design integration under design and build contracts.
• Building Information Modelling (BIM) Services BIM-enabled 3D modelling of structural frames and drainage networks using Autodesk Revit and Civil 3D, with clash detection analysis via Navisworks, providing multi-discipline design teams with coordinated, clash-free models before site works begin.
• Value Engineering and Sustainable Design Value engineering service delivering measurable cost savings through alternative structural solutions, low reinforcement rates, design optimisation, and embodied-carbon reductions (including carbon-neutral piling and BREEAM Outstanding targets), demonstrated across projects such as Ruskin Square (£2M saving), The Residence Nine Elms (£500K saving), and Chrisp Street (10% reinforcement weight reduction).

Quantifiable outcome

• Value engineering saving of £2M on Ruskin Square £33M project through alternative piling solution and structural changes
• +7 more outcomes

Named customers30 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Two partnerships are on record, tiered minor and core.

• Crest NicholsonminorStrategic or Co-development Partner · 1 August 2018PTA was appointed to the Crest Nicholson Temporary Works Forum, establishing a formal consultative and collaborative relationship for temporary works engineering services on Crest Nicholson residential developments.
• ChancerygatecoreStrategic or Co-development Partner · 1 March 2018Following positive meetings at MIPIM 2018 in Cannes, PTA entered a framework agreement with Chancerygate, a major industrial developer. This partnership has led to multiple industrial and warehouse development projects including Vantage 41 Aston Clinton, Aerial Park Chesham, 40:40 Link High Wycombe, and others. The framework agreement represents an ongoing strategic relationship for the delivery of structural and civil engineering design services across Chancerygate's development portfolio.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Arup: Global engineering consultancy with deep UK presence in structural, civil, and infrastructure design. Competes on flagship mixed-use and high-rise projects where PTA also bids, but with vastly larger resources and global reach.
• BDP (Building Design Partnership): Major UK-headquartered interdisciplinary design practice including structural and civil engineering. Competes for large residential and education-sector commissions with integrated architecture + engineering delivery.
• WSP: Global professional services firm with a large UK structural/civil engineering practice competing for the same major residential and infrastructure projects as PTA, but offering much broader multidisciplinary services.
• Mott MacDonald: Major global engineering consultancy with UK structural and civil design practices serving many of the same developer and contractor clients (e.g. Berkeley, Bellway) but at a materially larger scale and broader service scope.

Direct peers

• Civic Engineers: Multi-disciplinary engineering consultancy working on complex urban, residential, and infrastructure projects in the UK; comparable in scale, BIM-led delivery, and developer-client base.
• Curtins: UK-based civil and structural engineering consultancy with comparable headcount and a track record of value-engineered residential and commercial projects. Direct competitor on similar tender portfolios across Northern and Southern England.
• Heyne Tillett Steel: UK structural and civil engineering consultancy of comparable mid-size scale, focused on commercial, residential, and adaptive reuse projects in London. Directly comparable as a privately-held, design-led firm serving similar developer and architect clients.
• Swanton Consulting: Chesham/London-based structural and civil engineering consultancy of comparable scale, serving residential and commercial developers across the South East. Closely comparable peer given proximity and similar client verticals.
• Mann Williams: UK structural and civil engineering consultancy of similar scale focused on building structures including residential, commercial, and heritage projects. Comparable in delivery model and tender competition.
• Campbell Reith: UK civil and structural engineering consultancy of similar size serving developers, contractors, and architects on residential, commercial, and education projects. Comparable in service offering and client profile.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 PTA