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Infrastructure Companies in Portsmouth: 174 Active Firms (2026)
Infrastructure companies in Portsmouth design, build and maintain essential physical and digital systems across the surrounding metropolitan area.
Buying centres are likely to sit with estates teams, local authorities, utilities buyers, transport operators, telecoms managers and construction main contractors, rather than a single central software or facilities budget. The sales motion tends to be bid-led: framework places, site surveys, safety documentation and evidence of crew availability matter before pricing is settled. Customers look for suppliers able to handle physical works, maintenance regimes or digital infrastructure operations across Portsmouth and the wider South Coast. Engagements are usually project packages, term maintenance agreements or specialist subcontract roles, with repeat work tied to asset condition and response times.
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Portsmouth has 174 actively trading infrastructure companies, a compact local supplier base by the standards of broad construction and engineering markets. Their stated employment footprint is 789 people, pointing to a cohort dominated by specialist contractors, maintenance operators and service managers rather than very large asset owners. The shape fits a city market serving the surrounding metropolitan area and wider South Coast, where marine, utilities, transport, telecoms and public-realm requirements sit close to construction-support work.
Contracts in this market tend to sit at the intersection of planning consent, public procurement, safety duties and sector-specific technical standards. Utilities, transport, telecoms and public-realm work bring different approvals and record-keeping obligations, so qualification, insurance and method statements often matter before a supplier reaches price negotiation. Portsmouth’s coastal and marine-facing work also points to a delivery environment where access, permitting and weather windows can affect scheduling. For digital infrastructure, resilience, cyber controls and service continuity tend to form part of customer assurance, even where the provider is not itself a regulated utility.
Demand appears likely to stay practical and contract-led, pulled by maintenance backlogs, energy-efficiency work, network resilience and public-realm renewal rather than speculative new build alone. Scale-up scarcity may persist: many local operators are crew-led businesses whose expansion depends on qualified labour, plant availability and framework access. Digital infrastructure providers should benefit where customers want monitored assets and remote management, but procurement scrutiny will keep sales cycles measured. Consolidation may happen around specialist subcontractors that can add geographic coverage or regulated capability to larger regional operators.
174
Active firms
2026
6
Over £5M revenue
Companies above threshold
42
Newer incorporations
Since 2022
Key facts
About 3% of the trading cohort reports turnover above £5M (6 of 174 firms) — the rest sits below that revenue band.
24% of the cohort was incorporated since 2022 (42 firms), so a sizeable share is in its first few filing cycles.
Portsmouth infrastructure firms span physical and digital systems rather than only building-site construction.
Researching the segment separately from general construction helps isolate companies tied to long-lived assets and maintenance cycles.
Sales targets tend to split between a handful of larger contractors and a wider base of local infrastructure specialists.
Business-continuity requirements are a recurring buying context where maintenance sits close to operational systems.
Top Portsmouth Infrastructure companies
ML (UK) DREDGING LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides capital and maintenance dredging for marinas, rivers, canals and other marine infrastructure. Operates cutter suction and backhoe dredgers with split hopper barges, and offers vessel and…
Serves B2B marine and inland waterway clients, including marina operators, ferry companies, port and harbour authorities, marine engineering firms, and contractors needing dredging support or vessel…
Financial Health
StableStable · -14% CAGR over 5y
Location
CABLE CONNECTIONS LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides commercial and industrial electrical contracting, including power network connections as a NERS‑accredited independent connections provider. Delivers cable laying, civil and groundworks, EV…
Serves B2B and public-sector customers including commercial and industrial organisations, developers, councils and local authorities across England and Wales, with some domestic EV customers and…
Financial Health
StrongStrong · Growing, Hiring · 24% CAGR over 4y
Location
R S Divers Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides commercial diving and marine civil engineering services for coastal and inland waterways, including underwater inspections, maintenance and repairs, salvage and recovery, wastewater and…
Serves utility companies, port authorities, local government, waterway operators, shipping companies and civil engineering contractors across the UK and Europe needing inshore or inland water-related…
Financial Health
HealthyHealthy · Hiring · 100% CAGR over 2y
Location
GARNEAD LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides piling and civil engineering services including close proximity CFA piling, basement construction, retaining and king post walls, reinforced concrete works, and coastal and marina structures…
Serves B2B and public-sector construction clients, including developers, main contractors and civil engineering teams needing piling, basement, retaining wall, coastal and marina works, especially…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
All Lanes Traffic Management Ltd
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides traffic management services for roadworks and events, including road closures, temporary traffic signals, signage, contraflow systems, and narrow lane layouts. Also offers traffic management…
Serves business and public-sector buyers responsible for small to medium road, event and highway works across Dorset, Hampshire, Surrey, Berkshire, Wiltshire and West Sussex.
Financial Health
StrongStrong · Growing · 0% CAGR over 1y
Location
Pro Pave (UK) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
HS Civils And Construction Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides civil engineering and highways works including road surfacing, patching and construction, highway improvements, utility ducting installation, drainage works, and repairs to highway…
Serves major UK construction and infrastructure contractors, including firms managing highway maintenance, defence estate roads and civil engineering projects.
Financial Health
StrongStrong · 60% CAGR over 2y
Location
M & R Rail Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong
Location
C.McKeigue Construction Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong · Hiring · 19% CAGR over 4y
Location
RJT Networks Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · 0% CAGR over 4y
Location
Archon Construction Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
DistressedDistressed · -13% CAGR over 3y
Location
Tawson Limited
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
StableStable · 0% CAGR over 1y
Location
Gattica Associates Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides utility infrastructure consultancy, offering design and management services for projects involving utilities. Supports regeneration, land development, highways, rail and civil engineering…
Serves UK clients, consultants and contractors involved in regeneration, land development, highways, rail and civil engineering projects, including major infrastructure and public-sector schemes.
Financial Health
DistressedDistressed · 0% CAGR over 2y
Location
Northport Construction Services Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides construction, design-and-build, refurbishment and maintenance services for public and commercial clients. Works on defence facilities, healthcare buildings, heritage structures, housing and…
Serves public-sector bodies and major organisations, including NHS trusts, the Armed Forces, local authorities and developers, plus clients in heritage, energy, housing and infrastructure sectors.
Financial Health
WeakWeak · Hiring · 10% CAGR over 3y
Location
Halliday Projects Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides civil engineering and construction services including site enabling works, infrastructure preparation, and building works. Acts as principal contractor and offers project and construction…
Serves public and private sector construction clients across the UK, including project owners, developers and contractors requiring civil engineering, site enabling, principal contractor and project…
Financial Health
StrongStrong
Location
Baker Dougan Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · -2% CAGR over 4y
Location
Bryburn Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides construction and engineering services including interior fit-out, civil engineering works, fire protection system installation, defence sector projects, and property maintenance and building…
Serves B2B and public-sector customers in the construction, defence and property sectors, including organisations commissioning fit-out, civils, fire protection and property works.
Financial Health
StableStable · 0% CAGR over 3y
Location
Mcandrew Martin
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides built environment consultancy including architecture, engineering, surveying and project management. Designs and delivers secure design‑and‑build projects and infrastructure for government…
Serves government, defence and private-sector industry clients operating in highly secure or assured environments, including UK and international public-sector bodies and contractors.
Financial Health
StrongStrong · Hiring · 15% CAGR over 2y
Location
SOUTHERN PAVING LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · Hiring · 19% CAGR over 4y
Location
MALDESTRA LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -68% CAGR over 4y
Location
BM UK Services Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · 0% CAGR over 4y
Location
MCG MANAGEMENT SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -68% CAGR over 4y
Location
Hampshire Groundworks & Surfacing Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides groundwork and surfacing services for commercial and residential projects, including excavation, drainage installation, road and pavement tarmacing, block paving driveways, patios, concrete…
Serves commercial contractors, site managers and domestic homeowners needing groundwork and surfacing for projects across Hampshire, Sussex, Surrey and London.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
MEON LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -67% CAGR over 4y
Location
JD Construction Portsmouth Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · 0% CAGR over 4y
Location
Southsea Services Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StableStable · 0% CAGR over 2y
Location
MALBORNE LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak
Location
GEORGE DUDMAN & SONS LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed · -76% CAGR over 4y
Location
Electrical & Pump Services Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, builds and maintains water and wastewater pumping and treatment systems. Provides engineering, construction, asset management and repair services, and supplies equipment including pump…
Serves B2B and B2C water-sector customers, including utilities, commercial and industrial sites, data centres, and domestic users seeking water treatment, pumping, wastewater, water boosting and…
Financial Health
StrongStrong
Location
PAVENET LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides civil engineering and infrastructure services including highway construction and maintenance, groundworks, road and footway surfacing, and vacuum excavation. Supports transport and…
Serves B2B and public-sector clients involved in highways, infrastructure and development projects, including developers, transport schemes and civil engineering contractors across Hampshire,…
Financial Health
StableStable · -13% CAGR over 4y
Location
S Courtney Contractors Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides civil engineering and groundworks services including commercial groundworks, trench excavation, utility installation, cable pulling, tarmac and drainage works, and industrial concrete…
Serves commercial and industrial clients, main contractors and facility operators in Hampshire and the South Coast, including factories, warehouses, car parks and businesses requiring…
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 4y
Location
VEREVO ASSETS LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides telecommunications infrastructure services for network operators and internet service providers, including civil engineering works, fibre optic cabling and splicing, and aerial installation…
Sells to telecoms network operators and internet service providers, serving B2B buyers involved in fibre and digital infrastructure rollout. Targets organisations delivering connectivity projects…
Financial Health
WeakWeak
Location
Constructex Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides maritime civil engineering services including inspection, maintenance and repair of marine structures. Undertakes commercial diving and condition surveys and advises on repair schemes for…
Financial Health
HealthyHealthy · Hiring · 9% CAGR over 3y
Location
GDM (Surfacing Contractors) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides road and asphalt surfacing services for commercial sites, private estates and infrastructure. Carries out resurfacing of roads, car parks, driveways, footpaths, airports and sports surfaces…
Serves commercial property owners, airports, car park operators, private estates, sports facilities and homeowners across central Southern England.
Financial Health
StableStable · -2% CAGR over 4y
Location
L.A. KATTENHORN & PARTNERS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -1% CAGR over 4y
Location
Parchow Groundworks Limited
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsProvides groundwork and civil engineering services for construction projects, including foundations and concreting, drainage installation, formwork, and hard landscaping. Works on projects such as…
Serves local authorities, public-sector sites such as schools, hospitals and universities, Environment Agency framework contractors, homeowners and large commercial businesses with construction,…
Financial Health
StableStable · 0% CAGR over 3y
Location
Viking Projects (UK) Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides groundworks and civil engineering services for residential and commercial developments, including earthworks, road and sewer installation, highways construction, and site preparation for…
Serves housebuilders, property developers and main building contractors on residential and commercial development projects, from individual plots to large housing schemes, within a 70-mile radius of…
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
HANEVO LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and delivers infrastructure projects for sectors including healthcare, education, food processing and pharmaceuticals. Provides design, construction, installation, and maintenance of water…
Serves B2B and public-sector clients in critical infrastructure sectors, including hospitals and healthcare estates, education providers, water utilities, municipal wastewater operators, and…
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 2y
Location
Robert Nicholas Limited
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsProvides temporary works and civil engineering services for water and infrastructure projects, including design and installation of temporary dams, cofferdams and flood barriers, flow bypass systems,…
Serves transport, utility and construction companies delivering critical infrastructure projects, including teams needing temporary works around water, rail assets, flood defences and civil…
Financial Health
HealthyHealthy · Hiring · 30% CAGR over 5y
Location
SOUTHERN UTILITIES LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides utility infrastructure construction services for gas networks, including gas mains replacement, installation of new gas pipelines, cathodic protection systems, deep excavations and no‑dig…
Targets B2B customers: large and medium-sized utility infrastructure owners, particularly gas network operators and asset owners requiring accredited contractors for infrastructure projects and…
Financial Health
StrongStrong · Hiring · 18% CAGR over 2y
Location
HJ Construction Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides foundation and reinforced concrete services for construction projects, including formwork installation, reinforcement fixing, and in-situ concrete placing. Works with building contractors on…
Serves local building contractors and industrial and commercial clients in the construction industry across the South of England, with emphasis on Gosport and Portsmouth projects.
Financial Health
HealthyHealthy · Hiring · 9% CAGR over 4y
Location
N & T Plant Hire Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · -10% CAGR over 4y
Location
GIGATECH NETWORK SOLUTIONS LTD
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · 0% CAGR over 2y
Location
ATLAS STEEL LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
DistressedDistressed · -78% CAGR over 3y
Location
L G WOOD LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides wastewater and sewerage infrastructure services for utility networks, including flood mitigation, sewer repair and rehabilitation, no‑dig pipe lining, drainage maintenance, CCTV surveys,…
Serves utility providers and framework contractors responsible for water, wastewater and sewerage networks, including infrastructure asset owners and contractors operating across utility networks.
Financial Health
WeakWeak · Hiring · 32% CAGR over 2y
Location
COOMBES GROUP LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides forestry, arboricultural and vegetation management services alongside civil engineering, ecological consultancy and habitat management. Also offers timber harvesting, woodland management,…
Serves rail infrastructure operators, rail contractors, public-sector infrastructure clients, and large landowners or forestry estates, with emphasis on the UK railway network and landowners in the…
Financial Health
StableStable · -90% CAGR over 2y
Location
Dynamic Energy Solutions Holdings Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides renewable energy and electrical contracting services for commercial and industrial clients, including solar farm development and asset management, EV charger installation, high‑voltage…
Serves B2B customers, including commercial and industrial property operators, solar farm owners, facilities managers and companies needing renewable energy, EV charging, high-voltage or electrical…
Financial Health
StrongStrong · Growing, Hiring · 35% CAGR over 5y
Location
Form Engineering Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and delivers slipform construction systems and contracting services. Develops and operates specialised equipment for building concrete structures such as deep shafts, silos, bunkers and…
Serves B2B construction clients, including main contractors, infrastructure developers and industrial asset owners in energy-from-waste, water, tunnelling, pumping station, silo and deep shaft…
Financial Health
StableStable · 0% CAGR over 2y
Location
JTS CIVIL ENGINEERS LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides civil engineering services focused on water infrastructure, including water main leak detection, pipe repair and replacement, external water pipework works, blocked drain clearance, and…
Serves homeowners, commercial clients, water companies, local authorities and property management firms, mainly in the south of England, needing water mains, leak and drainage support.
Financial Health
WeakWeak · -6% CAGR over 2y
Location
BCT SERVICES (SOUTH) LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides groundworks and civil engineering services for housing developments, including site clearance, earthworks, drainage systems, highways works, structural foundations, substructure brickwork,…
Sells to national and regional housing developers and residential construction clients across the South of England, especially Hampshire, Dorset, Sussex, Berkshire and Surrey, including major…
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
Location
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How Portsmouth Infrastructure companies work and how to sell to them
What they do
Portsmouth infrastructure firms typically earn revenue from delivery rather than pure advisory work: surveys, installation, civil works, network build, planned maintenance, inspections and emergency response. Pricing is often built from schedules of rates, fixed-price work packages, call-out charges and term service agreements, with margin tied to labour utilisation, plant availability and subcontract control. Digital infrastructure operators may add monitoring, hosting or managed operations fees, but the buyer still tends to judge them on uptime, response evidence and local service coverage. Only 6 local firms sit above £5M revenue, so many commercial models remain owner-managed or crew-led.
Who they sell to
Buyers are usually organisations with assets to keep open: local authorities, utilities operators, transport businesses, telecoms managers, estates teams and main contractors using specialist subcontractors. Decision-makers tend to include heads of estates, project managers, engineering managers, commercial managers, procurement leads and health-and-safety owners. Smaller jobs can be awarded through approved supplier lists or direct call-offs, while larger packages usually need tender responses, insurance checks, references, method statements and site evidence. Sales cycles are therefore less about impulse demand and more about budget windows, framework access, risk review and the customer's confidence that crews can turn up when access is available.
What they buy
Most infrastructure firms tend to spend on systems and services that protect margin on difficult-to-schedule work. Relevant categories include job management, estimating, asset management, document control, field-service scheduling, fleet and plant tracking, project accounting, payroll, CRM, procurement and health-and-safety compliance. Firms handling digital infrastructure may also need monitoring, cyber security, backup, identity management and service-desk tooling. Services pitches often land around bid writing, public procurement advice, insurance, certification support, specialist recruitment, training, tax, audit and contract law. The common thread is evidence: who attended site, what was inspected, which standard was met and whether costs stayed inside the package price.
Why and how to sell to them
Infrastructure buyers tend to evaluate vendors when a new framework opens, a contract win stretches operational capacity, compliance paperwork starts slowing tenders, or response-time penalties begin to affect margins. Incorporation activity also matters: 42 local firms have been incorporated since 2022, and younger operators may need finance, accounting, recruitment and workflow systems before their first larger contracts arrive. Outbound angles work better when tied to operational friction, such as reducing survey-to-quote time, proving safety compliance, allocating crews across Portsmouth and the South Coast, or giving managers earlier warning when labour, materials or access constraints put delivery at risk.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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Frequently asked questions
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