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Infrastructure Companies in Middlesbrough: 160 Active Firms (2026)
Infrastructure companies in Middlesbrough build, maintain and operate physical networks and facilities across the surrounding metropolitan area.
Buying decisions usually sit with property, estates, operations, procurement and project-delivery teams, rather than a single technology or finance owner. The customer base is mostly commercial, industrial and public-sector, with work sold through tenders, framework agreements, maintenance retainers and project packages. Engagements tend to be local and operational: site mobilisation, engineering delivery, asset upkeep, reactive maintenance and compliance support. That gives the sector a mixed commercial shape, with some businesses acting as principal contractors and others supplying specialist services into wider build, utilities, transport or facilities programmes.
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Middlesbrough has 160 actively trading infrastructure companies in this list. That points to a locally anchored contractor and services base rather than a market dominated by a small number of regional asset owners. Reported employment totals 854 people, so the footprint appears weighted towards project teams, maintenance crews and specialist engineering capacity. The cohort also includes a limited higher-turnover layer, suggesting that most firms remain closer to owner-managed or specialist-service scale than to major infrastructure operator status.
Public-sector and commercial infrastructure work in Middlesbrough is shaped less by a single sector licence than by project-by-project procurement, planning conditions, construction obligations, environmental permitting and site-safety duties. Contractors touching utilities, transport assets or essential site services face close scrutiny over outage risk, method statements, subcontractor control and insurance cover. Cash conversion can be uneven, because mobilisation costs, retention clauses and milestone billing often sit ahead of final certification. That tends to favour operators with disciplined contract selection and enough working capital to absorb delays.
Future demand appears tied to renewal, maintenance and compliance rather than speculative expansion. The cohort is likely to keep separating between asset-light specialists, which can move across facilities and essential site services, and contractors with enough balance-sheet depth to take on longer programmes. Public-sector procurement discipline may keep margins tight, while commercial and industrial customers tend to prize reliability, response times and local engineering capacity. Consolidation could occur where smaller operators lack succession options or struggle with insurance, labour and working-capital pressure, but the market still looks service-led rather than platform-led.
160
Active firms
2026
13
£5M+ firms
reported revenue above £5M
47
Recent incorporations
incorporated since 2022
Key facts
About 8% of the trading cohort reports turnover above £5M (13 of 160 firms) — the rest sits below that revenue band.
29% of the cohort was incorporated since 2022 (47 firms), so a sizeable share is in its first few filing cycles.
Middlesbrough infrastructure suppliers tend to sit between local capital projects, maintenance work and operational contracts.
The market includes contractors and specialist service providers working across physical networks and facilities.
Procurement is likely to be shaped by public-sector frameworks, project delivery risk and the need for local operating coverage.
Top Middlesbrough Infrastructure companies
Bottomley Site Services Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides civil engineering services including rail infrastructure works, utilities installation, and structural steelwork. Delivers projects such as track formation, platforms, drainage systems,…
Serves B2B clients across the UK in rail, utilities, infrastructure, commercial and industrial construction, including organisations needing support for rail assets, utility networks, bridges and…
Financial Health
StrongStrong · Growing, Hiring · 19% CAGR over 4y
Location
Infratec Assets Limited
Trajectory
3y · 2023–NowProvides highway infrastructure services including civil engineering works, power and communications cabling, street lighting installation, and deployment of road technology systems. Also conducts…
Serves B2B and public-sector highways infrastructure customers across the UK, including Strategic Road Network major projects, local authorities, and contractors requiring accredited workplace safety…
Financial Health
Insufficient historyInsufficient history
Location
Mardec Utilities Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides civil engineering services for telecommunications and electrical infrastructure projects, including mole ploughing, installation of ducts, subducts and fibre optic cables, chamber…
Serves B2B clients delivering telecoms and electricity infrastructure projects, including major utilities, network operators and civil engineering contractors needing project support or specialist…
Financial Health
StrongStrong · Growing · 0% CAGR over 5y
Location
Intelect Midlands Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides engineering services to process industries, including design, construction and project management, electrical and mechanical engineering, control and automation systems, fabrication, and…
Serves B2B clients in process industries, including food and beverage producers, water and power utilities, renewable energy operators and heavy industrial sites needing contractor support for plant…
Financial Health
StableStable · -22% CAGR over 2y
Location
DLM FIBRE LTD
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
StrongStrong · Hiring · 50% CAGR over 1y
Location
H & A Height Services Ltd.
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides steeplejack and high‑access services for industrial structures, including erection, dismantling and repair of construction and engineering facilities. Offers building maintenance, concrete…
Serves industrial, construction and engineering organisations that operate facilities requiring specialist site maintenance, construction or demolition support, in the UK and internationally.
Financial Health
StableStable · -7% CAGR over 2y
Location
SIRIUS (NE) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides consulting and contracting services for land development, including demolition, earthworks, site remediation, drilling, and civil engineering. Also delivers geotechnical and environmental…
Serves UK development teams and organisations in the residential, commercial, renewable energy, waste and minerals sectors, especially those developing brownfield or greenfield land.
Financial Health
StrongStrong · 0% CAGR over 3y
Location
R.C. Ayres Building & Roofing Services Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides construction, civil engineering, building and roofing services for commercial and industrial clients, including work for petrochemical facilities. Activities include structural building…
Serves commercial and industrial clients, particularly industrial operators and petrochemical businesses, including COMAH-regulated sites, needing construction, civil engineering and roofing support.
Financial Health
WeakWeak · -2% CAGR over 3y
Location
Brian Moralee Lifting Services BMLS UK Ltd
Trajectory
1y · 2024–NowFinancial Health
Insufficient historyInsufficient history
Location
CULRINN LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable
Location
Wb Engineering Services Limited
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
S Robinson Contracts Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
Liam's Jointing Services Ltd
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
DistressedDistressed · 0% CAGR over 1y
Location
PALIN TECHNICAL ENGINEERING SERVICES LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed · 0% CAGR over 4y
Location
ADC RENEWABLES LTD
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · 0% CAGR over 3y
Location
AMCS CONSULTANTS LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
KHM Civils Ltd
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
WeakWeak · Hiring · 14% CAGR over 3y
Location
NBCE LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
ECO FENCING (LONDON) LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak
Location
O&G SOLUTIONS (NORTH EAST) LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong
Location
Maisav Projects Limited
Trajectory
1y · 2024–NowFinancial Health
Insufficient historyInsufficient history
Location
SLW ENGINEERING LIMITED
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
StableStable
Location
J&J Plant (NE) Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides high and low voltage electrical infrastructure services including cable installation, jointing and termination, and switchgear and transformer installation, testing and removal. Also offers…
Serves B2B clients in industrial and infrastructure sectors, including steel, chemicals, energy and rail operators, plus contractors needing plant hire, civils and high-voltage electrical support…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
Able
Develops and operates port facilities supporting offshore wind projects, including marshalling, assembly and operations bases. Provides marine decommissioning and recycling of offshore structures,…
Serves large industrial and infrastructure customers, including offshore wind developers, marine recycling and decommissioning operators, renewable energy projects, data centre developers, and firms…
Location
AZZCON LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides civil engineering and groundworks services including site preparation, bulk excavation, foundations, trenching, backfilling and reinstatement. Also carries out utilities repair and…
Targets B2B clients in construction, utilities, pharmaceutical facilities, petrochemical plants and industrial sites across Teesside and the North East, including project managers and site operators.
Financial Health
StrongStrong · Hiring · 38% CAGR over 4y
Location
Tangent Construction Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides civil engineering and construction contracting services, including groundworks, highways improvements, reinforced concrete works, road and sewer remediation, and landscaping for housing…
Serves housebuilders, local authorities and public-sector bodies, plus clients in petrochemical, offshore, utilities, education, retail, energy, transport, highways, NHS and Ministry of Justice…
Financial Health
StableStable · -8% CAGR over 6y
Location
CBL Cable Contractors Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical cabling installation and support services, including high‑ and low‑voltage power cabling, fibre optic, data communications, control and subsea cables. Works as a subcontractor on…
Serves main contractors and industrial operators on large and small projects across power, petrochemical, oil and gas, marine, steel, healthcare, commercial property, highways, tunnels and rail…
Financial Health
StableStable · Profitable, Hiring · 8% CAGR over 4y
Location
Todds Highway Maintenance Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides road planing and highway maintenance services, including asphalt removal, patching and trenching for roads, car parks, bridge decks and motorways. Operates specialist planing machinery and…
Serves B2B and public sector customers needing highway maintenance, including local authorities, major contractors, and private-sector clients commissioning road, motorway, bridge deck, street works,…
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 2y
Location
S.W.Directional Drilling Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides trenchless utility and drainage installation services using directional drilling, pipe ramming and impact moling. Designs and installs underground crossings and pipelines, and offers CAD…
Serves civil engineering contractors, utility providers, drainage specialists and infrastructure project teams, including public-sector and regulated-asset projects across roads, railways, rivers,…
Financial Health
StableStable · 0% CAGR over 2y
Location
Addison Plant Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides civil engineering and groundworks services including earthworks, deep drainage installation, road and sewer construction, site preparation, and in-situ structures. Also offers plant hire…
Serves B2B clients delivering infrastructure, commercial and industrial developments, including developers, main contractors and project owners needing civil engineering support across the North…
Financial Health
HealthyHealthy · Growing, Hiring · 5% CAGR over 4y
Location
MCL GROUP HOLDINGS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides rail logistics and storage services including rolling stock stabling, shunting operations, wagon maintenance and refuelling. Also supplies aggregates handling, contract crushing, earthworks,…
Serves B2B customers in the UK rail, port, aggregates and construction sectors, including rolling stock owners and operators, rail logistics teams, infrastructure contractors and quarrying or…
Financial Health
HealthyHealthy
Location
R ALLAN POWER SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · Hiring · 50% CAGR over 4y
Location
Lynas Engineers Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides civil and structural engineering consultancy services including preliminary and detailed design, infrastructure and highway schemes, road safety studies, and construction-stage support for…
Serves local authorities, public-sector bodies, highways agencies, utilities and civil engineering contractors involved in infrastructure, transport, water and community development projects in the…
Financial Health
StrongStrong · Growing, Hiring · 23% CAGR over 3y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides road surfacing and civil engineering services including asphalt surfacing, cold milling, line marking, and construction of roads and pathways. Also offers adoption packages and plant and…
Serves commercial clients, contractors, developers and domestic customers in the North East and wider North of England with road, pathway and surfacing project needs.
Financial Health
StrongStrong · Hiring · 44% CAGR over 4y
Location
SEYMOUR (CONSTRUCTION & PROPERTY MAINTENANCE) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides building construction and civil engineering services including groundworks, drainage, highway works and infrastructure for developments. Also undertakes minor property maintenance projects…
Serves B2B clients including property developers, main contractors, manufacturers, airport operators and commercial organisations, mainly across the North of England, as principal contractor or…
Financial Health
WeakWeak · -10% CAGR over 4y
Location
Sr Engineering Maintenance Services Ltd
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
SITEWIDE SOLUTIONS LIMITED
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
Jimmyx Ltd
Trajectory
2y · 2025–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
HealthyHealthy · 0% CAGR over 1y
Location
HMH Contracts Ltd
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsProvides civil engineering and groundworks services for construction projects, including installation of roads, drainage and sewer systems, and external works. Works with developers and contractors…
Serves construction and property development clients in the North East, Yorkshire and the Humber, including organisations commissioning civil engineering, groundworks, roads, sewers and external…
Financial Health
StableStable · Hiring · 14% CAGR over 3y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -68% CAGR over 4y
Location
HEWITSON LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides civil engineering and groundworks services for construction projects, including bulk earthworks, foundations, drainage systems, concrete slabs, external works, and fibre reinforced concrete…
Serves main contractors, developers and public-sector organisations across the UK, with project experience in leisure, education, industrial and civic developments.
Financial Health
StrongStrong · Profitable, Growing · 1% CAGR over 2y
Location
SEP CULANT LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides rope access and specialist access services for infrastructure projects, including cladding and glazing installation and repair, rail vegetation management, tree removal, fencing, civil…
Serves UK businesses and infrastructure operators, especially rail, renewable energy and construction companies needing contractors for high-risk site, access, vegetation and maintenance projects.
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 4y
Location
Bainbridge Brothers Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides ground investigation and drilling services including borehole drilling, window sampling, cable percussion and rotary drilling, trial pitting and foundation inspections. Works on…
Serves B2B clients in the UK electricity and windfarm sectors, including infrastructure developers, utilities and project contractors working on remote or difficult-access sites.
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 4y
Location
JSC Electrics Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides electrical contracting services including design, installation, maintenance, commissioning and testing of power distribution, lighting, fire alarms, CCTV, data cabling and generator systems…
Serves UK-wide commercial, public-sector and domestic clients, including rail operators, retailers, schools, colleges, universities, healthcare providers, pharmaceutical and chemical facilities, and…
Financial Health
StableStable · -3% CAGR over 5y
Location
MJ STRUCTURES LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -68% CAGR over 4y
Location
GPIE LTD
Trajectory
1y · 2024–NowFinancial Health
Insufficient historyInsufficient history
Location
Dmaffey Limited
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
Utility Civil Engineering Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides power systems engineering consultancy and design services, including electrical network design, protection studies, earthing design, power system analysis, and civil design for substations…
Serves B2B clients including property developers, landowners, utilities and private network operators involved in new developments, infrastructure schemes and electrical network projects, from land…
Financial Health
WeakWeak · -10% CAGR over 4y
Location
SEP Rail Services
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides railway surveying, design and engineering services for rail infrastructure projects. Conducts track, topographical, gauge clearance and UAV surveys, monitoring, drainage and civil design,…
Sells B2B to Network Rail, rail contractors and consultants across the UK. Serves buyers needing surveying, design, engineering and project support for railway infrastructure and associated…
Financial Health
DistressedDistressed · Hiring · 9% CAGR over 2y
Location
Volt Energy Projects Ltd
Trajectory
1y · 2024–NowFinancial Health
Insufficient historyInsufficient history
Location
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How Middlesbrough Infrastructure companies work and how to sell to them
What they do
Middlesbrough infrastructure firms usually earn revenue through fixed-price project work, schedule-of-rates maintenance, call-out charges, inspection programmes and retained service agreements. Some act as main contractors coordinating labour, plant and subcontractors; others sell specialist engineering, civils, facilities, utilities or compliance services into a larger delivery chain. Pricing tends to reflect site risk, mobilisation effort, labour availability, materials exposure and insurance requirements. Gross margin can depend as much on contract discipline as technical capability, because variations, delays, retentions and rework can turn a workable job into a cash drain.
Who they sell to
Customers are typically estates teams, facilities managers, operations directors, project managers, local authority buyers, industrial site managers and procurement teams. Most sales are direct or tender-led, with repeat work coming through approved supplier lists, framework agreements and subcontractor relationships. Smaller engagements can be won through local reputation and response time; larger packages usually require method statements, insurance evidence, safety credentials, references and priced schedules. Sales cycles vary from short-notice reactive work to longer procurement exercises, especially where public-sector rules, site shutdown windows or multiple subcontract packages are involved.
What they buy
Most infrastructure firms tend to spend on tools and services that reduce delivery risk rather than abstract productivity claims. Relevant categories include estimating and job-costing software, field-service management, fleet and plant tracking, health-and-safety systems, document control, workforce scheduling, payroll, HR, training, insurance broking, legal support and accounting advice. Firms with recurring maintenance work may also need CRM, customer portals, asset registers and planned-preventive-maintenance workflows. Cloud hosting and cyber security matter where site documentation, public-sector contracts or remote access are involved, but the buying case usually has to connect directly to compliance, cash collection, utilisation or fewer avoidable site visits.
Why and how to sell to them
Commercial triggers often appear when infrastructure firms win a larger framework, add new service lines, take on more subcontractors, open another depot or face tighter reporting demands from public-sector and industrial customers. Leadership change, recent incorporation, insurance renewal, safety incidents and working-capital pressure can also prompt supplier review. Outbound usually works better when it starts with operational leakage: unpriced variations, slow applications for payment, under-used labour, missed compliance evidence or too much administration between site and office. Claims about growth alone are less persuasive than a credible link to margin protection, audit readiness or faster billing.
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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