Topbond PLC

What Topbond PLC does

Topbond PLC is a Sittingbourne, Kent-headquartered specialist civil engineering and marine contractor founded in 1975, operating through seven divisions — Topbond (structural repair, refurbishment and drainage), HTS (UKAS-accredited structural investigation and testing), Intaspan (footbridge design and build), Broadmead (cast stone and precast manufacture), Marine, Plant, and Fleet — with a satellite office in Ipswich serving clients across England. Revenue is generated via project-based professional-services contracts, specialist marine plant hire (jack-up barges, pontoon systems, Uniflotes, Schottel tugs) and cast-stone manufacturing, secured through competitive tendering, framework agreements and direct appointments with infrastructure owners, port operators, local authorities, central-government agencies and heritage bodies. Delivered capability spans highway structures, rail, marine, aviation, energy, luxury residential, heritage, public buildings, retail/commercial and public realm, anchored by in-house temporary works design and proprietary methods including carbon-fibre heritage repair, PAM robotic demolition and MEWP-over-river access. Founded as a UK public limited company and remaining privately held with no disclosed external investors or M&A activity, Topbond's commercial position is reinforced by an accreditation stack (Constructionline Gold, Achilles Building Confidence, RISQS, UKAS, ISO) and an industry award record including the 2018 BCIA Small Project of the Year and an ICE Historic Bridges Award.

Name

Topbond PLC

Legal name

Topbond PLC

Website

https://topbond.co.uk

Company type

Private

Founded year

1975

Operating status

Operating

Headcount range

51–100 employees

Short description

Topbond PLC is a UK specialist contractor providing structural repair, refurbishment, UKAS-accredited testing, footbridge design-and-build, cast stone manufacturing and marine construction and plant hire to infrastructure, port, heritage, aviation and energy clients in England.

Ownership category

akta.pro rank

Product category

Civil Engineering & Marine Construction Services

NAICS

Ship Building and Repairing (336611), Support Activities for Water Transportation (4883)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600), Construction, Mining & Materials Handling Machinery & Equip (3530)

akta.pro primary industry

Heavy Lift & Marine Recovery (Cranes, Barges, Jack-up Support) (TLAHAIAF)

akta.pro secondary industry

Heavy Lifting & Material Handling Infrastructure (Goliath Cranes, Jib Cranes, Hoists) (IMAJALAD)

Keywords

• Structural repair services
• Marine construction services
• Footbridge design build
• Civil engineering contractor
• Cast stone manufacturing

Headquarters

HQ city

Sittingbourne

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Specialist Construction Services: Project-based specialist construction and civil engineering services including structural repair, refurbishment, drainage, and marine construction delivered through direct client engagement.
2. Survey and Testing Services: UKAS accredited structural investigation and testing services provided through HTS division to clients responsible for maintaining buildings and structures.
3. Footbridge Design and Build: Complete footbridge design and build services through Intaspan division.
4. Cast Stone and Precast Manufacturing: Design, manufacture, and where required site fixing of cast stone and precast products through Broadmead division.
5. Marine Plant Hire: Specialist marine plant hire including jack-up barges, pontoon systems, Uniflotes, and Schottel tugs.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Topbond PLC is a UK specialist civil engineering and marine construction contractor delivering structural repair, refurbishment and drainage services for buildings, bridges and other structures. Through its divisions it provides UKAS-accredited structural investigation and testing, footbridge design and build, cast stone and precast manufacturing, marine construction services, and specialist marine plant hire including jack-up barges and pontoon systems. Services are delivered nationwide from offices in Sittingbourne, Kent and Ipswich, Suffolk, serving infrastructure, rail, marine, heritage, aviation, energy, and public realm clients.

Product overview

Topbond PLC is a construction and marine industry specialist offering a portfolio of interconnected services through multiple divisions. The core offering includes structural repair and refurbishment (Topbond), UKAS-accredited survey and testing services (HTS), specialist footbridge design and build (Intaspan), and cast stone/precast manufacturing (Broadmead). Marine capabilities are delivered through dedicated Marine construction, Plant hire, and Fleet divisions providing jack-up barges and pontoon systems. Services span Highway Structures, Rail, Marine, Infrastructure, Power, Aviation, Luxury Residential, Heritage, Public Buildings, Retail & Commercial, and Public Realm sectors. The company operates from Head Office in Kent and satellite office in Suffolk, established in 1975.

Differentiator

Problem solved

Functional benefit

Brands

• HTS: UKAS accredited nationwide structural investigation and testing service for bridges, industrial plants, multi-storey car parks, schools, and offices.
• Intaspan
• Broadmead
• Topjack
• Topbond Marine

Products and services

• Topbond (Structural Repair, Refurbishment and Drainage) Structural repair, refurbishment and drainage services for buildings, bridges and other structures, delivered nationwide by Topbond's core civil engineering team with over 50 years of experience.
• HTS (UKAS Accredited Survey and Testing)

Quantifiable outcome

• British Construction Industry Awards - Small Project of the Year 2018 for Kingsmoor flood alleviation scheme
• +3 more outcomes

Named customers13 records

Segments7 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

13 partnerships are on record, tiered core, notable and minor.

• English HeritagecoreStrategic or Co-development PartnerCollaboration on heritage restoration projects including working with English Heritage during the Dreamland rollercoaster reconstruction project. Topbond worked closely with English Heritage to overcome challenges of maintaining Grade II listing whilst complying with current design standards.
• Lincoln CastlenotableStrategic or Co-development PartnerAnchor technology capabilities deployed at Lincoln Castle providing stabilisation without compromising aesthetic appearance of the structure.
• Institution of Civil Engineers (ICE)notableStrategic or Co-development PartnerTopbond's Tickford Bridge project won an Historic Bridges Award from ICE. ICE is the professional body for civil engineers.
• Concrete Bridge Development GroupminorOthersTrade association membership providing industry networking and best practice sharing.
• Corrosion Prevention AssociationminorOthersTrade association membership in the concrete repair and protection sector.
• Concrete Repair AssociationminorOthersTrade association membership for concrete repair specialists.
• UK Cast Stone AssociationminorOthersTrade association membership for cast stone manufacturers and suppliers.
• Concrete SocietyminorOthersTrade association membership providing technical guidance and industry standards for concrete.
• Environment AgencycoreStrategic or Co-development PartnerFramework agreement partnership for flood defence works. Topbond collaborated with Environment Agency on the Boston Barrier project, one of the biggest civil engineering projects in Boston, and Berry Hill footbridge removal over flood relief channel.
• Essex County CouncilcoreStrategic or Co-development PartnerLong-standing framework agreement with Essex County Council for projects including the Kingsmoor flood alleviation scheme.
• Transport for BuckinghamshirecoreStrategic or Co-development PartnerFramework agreement partnership for Berry Hill footbridge replacement project.
• Platipus Anchors LtdnotableTechnology or IntegrationCollaboration on Edginswell project where approximately 550 Platipus Anchors were installed to support 137m cutting approximately 6m deep for new business park construction in Torquay region.
• Network RailcoreStrategic or Co-development PartnerRail infrastructure projects requiring network rail possessions and approvals. Topbond designed complex temporary works presented to Network Rail for approval for Cowdray Avenue railway bridge project.

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Kier Group: Major UK infrastructure, highways, and utilities group. Listed as a Topbond customer and provides a comparable benchmark for Tier-1 UK construction capability, though substantially larger and more diversified across non-specialist general contracting.
• Costain Group: UK infrastructure and engineering solutions provider focused on transport, water, and energy. Comparable to Topbond in infrastructure and marine-adjacent capability, with significantly broader scale and blue-chip public sector framework presence.
• Balfour Beatty: One of the largest UK infrastructure groups, operating across rail, highways, marine, and utilities. Overlaps with Topbond in specialist infrastructure repair but operates at significantly greater scale as a tier-one prime contractor.
• Bam Nuttall: UK civil engineering contractor delivering rail, highways, marine, and energy infrastructure. Listed as a Topbond customer, providing context as a tier-one prime that uses specialist subcontractors like Topbond for marine and structural repair scopes.

Direct peers

• VolkerStevin: UK-based civil engineering and marine construction contractor delivering port, coastal, and waterway projects. Directly comparable to Topbond's Marine and Plant divisions given overlapping jack-up barge, piling, and marine civil capabilities for UK infrastructure clients.
• Knights Brown: UK civil engineering and construction contractor operating across marine, highways, and structures. Comparable to Topbond across multi-disciplinary civil works, marine construction, and framewok relationships with public sector clients like Environment Agency and county councils.
• McLaughlin & Harvey: UK and Ireland civil engineering contractor with strong marine, ports, and infrastructure credentials. Comparable to Topbond across multi-disciplinary delivery, marine plant operation, and heritage/infrastructure repair work.
• John Sisk & Son: Ireland and UK civil engineering and construction contractor with heritage, marine, and infrastructure capabilities. Comparable to Topbond in multi-disciplinary civil work, heritage restoration expertise, and integrated marine construction delivery.
• Jackson Civil Engineering: Mid-sized UK civil engineering contractor delivering infrastructure, highways, flood defence, and marine projects. Comparable to Topbond in scale (~hundreds of employees), service scope, and dependence on UK public sector frameworks.

Emerging players

• Expanded (Laing O'Rourke): Specialist geotechnical and structural contractor within Laing O'Rourke. Comparable to Topbond in specialist foundation, structural, and marine-adjacent capability, though operating within a much larger parent group's portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/topbondplc
• YouTubeyoutube.com/channel/UCJ9XLHeVZqs6qFlwW-BYKeg
• LinkedInlinkedin.com/company/topbond-plc

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries7 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 Topbond PLC