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  4. JT Mackley & Co Ltd
JM

JT Mackley & Co Ltd

Construction work · Small Dole
SME

Mackley is a specialist civil engineering contractor focused on delivering coastal, river, water, and complex infrastructure projects. They aim to build a sustainable future through innovative engineering solutions.

mackley.co.uk ↗

Summary from the supplier’s website — unverified

Compare peers
Awarded
£80.8m
Live
14
Buyers
20
12m
£23.1m
At a glance
  • Quick answer
Profile
  • Social value
  • ESG & policies
  • Capabilities4
  • Buyer references
  • Accreditations
Track record · verified
  • KPI performance
  • Contracts14 / 47
  • Top buyers20
  • Category mix
  • Geography
  • Peers5
Trust & risk
  • Red flags0
  • Compliance
  • Modifications
  • News
Company
  • Companies House
  • Financial
  • Org tree
Quick answer — JT Mackley & Co LtdUpdated 06 Jul 2026

At a glance · for buyers and watchdogs

JT Mackley & Co Ltd has won £80.8m across 20 public-sector buyers, with 14 live contracts. No active Companies House risk flags.

Why: top buyer Environment Agency (Defra Group Commercial) at 28% · 99% in Construction work · 0 active risk flags · 0 modifications.

Decision signals
0Active red flags
ActiveCompany status
14 of 47Live contracts
28%Top-buyer concentration
99%Category exposure
0Contract modifications
If you're a buyer:CapabilitiesReferencesKPIComplianceWatchdog?FlagsModificationsConcentrationNews

Social value · 2/5

Commitments mapped to the Government Social Value Model themes. Each is tagged self-reported or from the website.

◐ From supplier website
JobsNo commitment stated✓
Skills1 commitment ↗✓
Environment3 commitments✓
Tackling inequalityNo commitment stated✓
CommunityNo commitment stated✓
Skills · 1
  • WebsiteSTEM – Encouraging the Next GenerationPromoting STEM education to inspire future engineers.
Environment · 3
  • WebsiteBuilding Sustainable StructuresCreating infrastructure to address challenges like rising sea levels and severe weather events.
  • WebsiteTackling Whole Project Carbon EmissionsFocusing on reducing carbon emissions across projects.
  • WebsitePromoting Innovation for Lower Impact TechnologiesEncouraging the development of technologies that minimize environmental impact.

Extracted automatically from mackley.co.uk on Jul 2026. Not independently verified — treat as the supplier’s own marketing claims.

ESG & policies vault · 0/5

Key governance & sustainability policies. Published documents link out; missing ones are greyed.

↔ Cross-checked
Net-zero planNot provided✓
Modern slavery statementNot provided✓
EDI policyNot provided✓
Anti-briberyNot provided✓
Data protectionNot provided✓

Capabilities

What this supplier does, where they sit, who they sell to.

◐ From website & notices
Sectors served · 1/8
Central government✓
Local government✓
NHS & health✓
Housing✓
Utilities & energy✓
Financial services✓
Education✓
Defence✓
Services · 5
Construction DeliveryDelivering civil engineering construction projects, from small civils works to large, complex multi-disciplinary schemes. ↗Early Contractor Involvement (ECI)Involvement in a project before it’s a project, utilizing expertise in the earliest stages of project development. ↗Design & ConstructOptions for combining design and construction activities, with in-house design capabilities. ↗MaintenanceMaintaining coastlines and water sector infrastructure, including restoring beaches and repairing sea walls. ↗Emergency ResponseFirst responder for flood incidents, ready to assess damage and organize immediate repairs. ↗
Frameworks & DPS · 4 from notices
  • Birnbeck Pier Reinstatement worksNorth Somerset Council · £19.8m
  • BHCC - Madeira Terraces Restoration Phase 1 - Main ContractorBrighton & Hove City Council · £12.5m
  • Victoria Breakwater Works, BrixhamTorbay Council · £3.5m
  • Poole Bay Beach Management Scheme - Groyne Building Programme 2022-2024Bournemouth Christchurch and Poole Council · £2.2m

Extracted automatically from mackley.co.uk on Jul 2026. Not independently verified — treat as the supplier’s own marketing claims.

Case studies · 2

Delivery stories from the supplier’s website. Clients are not yet cross-checked against award records.

◐ From supplier website
North Portsea Island Coastal Defence Scheme Phase 4Improving flood defences along Eastern Road to protect residents and businesses in North Portsea. ↗Shoreham Adur Tidal Walls SchemeUpgrading a derelict wharf for a new residential development on the tidal River Adur. ↗

Extracted automatically from mackley.co.uk on Jul 2026. Not independently verified — treat as the supplier’s own marketing claims.

Buyer references

Named public-sector contacts who have agreed to act as a reference.

✓ Confirmed by buyer
—

No buyer references yet

Public-sector buyers can confirm they'll act as a reference for this supplier. Confirmed references — with the contract they relate to — show here.

Accreditations & memberships

Independently issued. Verification dates cross-checked against issuer registers.

↔ Cross-checked
—

No accreditations recorded

B-Corp, ISO, Cyber Essentials, Living Wage and similar credentials appear here once added by a claimed supplier and cross-checked against the issuing register.

KPI performance

Delivery, budget and satisfaction scores reported quarterly by buyers.

✓ Verified
84

No verified KPI scores yet

Once buyers report contract KPIs — delivery on time, on budget, satisfaction, adoption and accessibility — a weighted grade and breakdown appear here.

Contracts · 14 live · 33 historic

Pulled from Contracts Finder & Find a Tender. Most recent first.

✓ From notices
TitleBuyerCPVAwardedValueTermStatus
Selsey West Beach Urgent Works
Chichester District Council—10 Jul 2026£740k3 moLive
KSL - SE - AOMR Lot 2 - Allington Tidal Works (Phased D&B)
Environment Agency4524840021 May 2026£136k6 moLive
Allington Sluice Drive System Replacement
Environment Agency4524830007 Apr 2026£2.0m1.5 yrsLive
MEAS Round Fields Managed Realignment Early Supplier Engagement
DEFRA7135150009 Mar 2026£93k12 moLive
KSL - AOMR - Black Sluice Recondition Programme
Environment Agency4522000012 Jan 2026£122k4 moClosed
SE - AOMR - Shirley Moore PS Pump Investigation
Environment Agency5110000012 Nov 2025£52k4 moClosed
SE - AOMR - Ferring Autoweedraker
Environment Agency4522000012 Nov 2025£224k5 moClosed
Stabilisation Works at Redbridge HWRC, Oxford
Oxfordshire County Council7124200017 Dec 2025£17k12 moLive
Birnbeck Pier Reinstatement works
North Somerset Council4500000013 Jun 2025£19.8m16 moLive
Allington Lock Building Refurbishment
DEFRA7132600023 Jun 2025£300k4 moClosed
Total live value £45.0m · mean award £1.7m1–10 of 47

Top buyers · 20 buyers · top 3 = 72%

Share of awarded value. Concentration fires above 40% for any single buyer.

✓ From notices
1
Environment Agency (Defra Group Commercial)
1 contract
28%
since 2024
2
North Somerset Council
2 contracts
24%
since 2025
3
Brighton & Hove City Council
5 contracts
20%
since 2021
4
Environment Agency
17 contracts
10%
since 2023
5
Torbay Council
1 contract
4%
since 2018
6
Canterbury City Council
2 contracts
4%
since 2018
7
Bournemouth Christchurch and Poole Council
2 contracts
3%
since 2020
8
Bournemouth Borough Council
1 contract
2%
since 2016
9
Dartford Borough Council
1 contract
1%
since 2024
10
Chichester District Council
2 contracts
1%
since 2023

Category mix

CPV-division share of last-12m awarded value. Single-category exposure: 99%.

✓ From notices
Construction work45
99%
Architecture & engineering71
0%
Installation services51
0%
⚠ Concentration: 99% of recent awarded value sits in a single CPV division. A category-specific downturn would materially affect revenue.

Geography

Distribution of awarded value by buyer region.

✓ From notices
UK · schematic only
South West6 contracts
66%
London21 contracts
20%
South East12 contracts
14%
North West1 contract
0%
Region resolved for 52% of awarded value (by buyer postcode); the remainder lacks a usable address.

Peers

Suppliers with overlapping CPVs & buyers (last 24m). JT Mackley & Co Ltd highlighted.

✓ From notices
SupplierSME?Awarded · 24mContracts
TC
Topcoat Construction Limited / TCL Group
Yes£67.6m2
IW
Ian Williams
No£67.6m2
WH
Westone Housing
Yes£67.6m2
ER
EQUANS Regeneration Limited
No£67.6m2
CH
C Hanlon Facilities Management Ltd
Yes£67.6m2
JM
JT Mackley & Co Ltd
Yes£23.1m—
Compare peers →

Red flags · 0 active

Automated scan of Companies House status, charges and insolvency records.

✓ Verified
✓ Clean. No active risk signals from Companies House status, charges or insolvency records.

Compliance scorecard

Derived from Companies House filings — not a full supplier-assurance check.

↔ Cross-checked
Trading status
Active
Live at Companies House
Annual accounts
Up to date
Last made up to 29 Dec 2024
Confirmation statement
Up to date
Next due 14 May 2027
Outstanding charges
0
No charges registered
Insolvency history
None
No insolvency cases registered
Certifications (ISO, Cyber Essentials, Living Wage, B-Corp, modern-slavery) are supplier self-reported and appear once a claimed profile adds them.

Modifications

Variations to awarded contracts logged under Procurement Act 2023 s.74.

✓ From notices
±

No modifications recorded

No published contract variations for this supplier. Modification notices appear here as they are issued under the Procurement Act 2023.

News mentions

UK trade press & nationals, matched to this supplier.

◰

No news mentions found

We haven't matched any recent UK press coverage to this supplier. Mentions appear here automatically as they're published.

Companies House

Live sync — registered details, directors, PSC and SIC codes.

✓ Live sync

Registered details

Company no.
00258810
Status
Active
Type
Private limited
Incorporated
04 Sept 1931
Reg. office
Bankside House, Henfield Road, Small Dole, West Sussex, BN5 9XQ
SIC codes
42990
Last accounts
29 Dec 2024
Next accounts due
30 Sept 2026

Directors & PSC

  • MILES, Stewart — secretary
    Appointed 11 May 2023
  • HAMER, Benjamin Alexander — director
    Appointed 13 Sept 2021
  • PAGE, Gary Charles — director
    Appointed 10 Oct 2005
  • Van Oord Uk Ltd — person with significant control
    ownership of shares 75 to 100 percent · voting rights 75 to 100 percent · right to appoint and remove directors · significant influence or control as firm

Financial

Filed accounts from Companies House.

↔ From Cos House
£

No financial filings on record

Turnover, profit and headcount appear here once audited or micro-entity accounts are filed at Companies House.

Org tree

Group structure and ownership.

↔ From Cos House
J.T.MACKLEY & CO.LIMITED
00258810 · this company

Independent. No parent company or subsidiaries recorded at Companies House for this entity.