- Companies
- Civil engineering
- Newport
- Clarke's Mechanical Limited
Clarke's Mechanical Limited
- Company number
- 02939373
- Incorporated
- 15 Jun 199432 years trading
- Registered office
- 9 ST Johns Place, Newport, Isle of Wight, PO30 1LH
- Nature of business
- Construction of other civil engineering projects n.e.c.
Clarke's Mechanical Limited is a 32-year-old private limited company registered in Newport, company number 02939373, one of 80 civil engineering contractors in Newport. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £3,285 (+3%) on the year before, to £111K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £996K against £926K owed within a year: 1.1 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £111K | £159K | £996K | £926K | 0 |
| 30 Jun 2024 | £108K | £218K | £1.1M | £1M | 37 |
| 30 Jun 2023 | £104K | £29K | £507K | £469K | 35 |
| 30 Jun 2022 | £103K | £118K | £730K | £643K | 35 |
| 30 Jun 2021 | £151K | £224K | £940K | £524K | 33 |
| 30 Jun 2020 | £161K | £30K | £644K | £471K | 38 |
| 30 Jun 2019 | £171K | £94K | £634K | £522K | 44 |
| 30 Jun 2018 | £114K | £89K | £720K | £650K | 46 |
| 30 Jun 2017 | £110K | £2,058 | £554K | £506K | 43 |
| 30 Jun 2016 | £253K | £246K | £710K | £492K |
Public contracts won
Clarke's Mechanical Limited has 4 public sector contract awards on record; the ones with their own published value total £589K, from 2016 to 2026. Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Isle of Wight1 award
- Isle of Wight Council1 award
- Isle of Wight Council1 award
- UK Shared Business Services Limited1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Isle of Wight | Maternity Ward Low Water Pressure | £275K | 16 Jan 2026 |
| Isle of Wight Council | Replacement Boilers at Newchurch Primary School | £102K | 5 May 2020 |
| Isle of Wight Council | Installation of Heating Pipework at Broadlea Primary School, Lake, Isle of Wight | £72K | 14 Dec 2016 |
| UK Shared Business Services Limited | UKSBS FM150125 Replacing Hot Water Calorifiers | £140K | 8 Feb 2016 |
Where Clarke's Mechanical Limited is registered
The registered office is in Newport (PO30), in the Isle of Wight local authority area, South East. Show PO30 1LH on a map.
Other trade companies in PO30
- Fet Property & Transport LtdProperty developers
- RMJ Property LimitedProperty developers
- J D Lower Plumbing and Heating LtdPlumbers and heating engineers
- Otta Carpentry LtdJoiners and carpenters
- Probuild Iw LtdBuilders
- Island Electrical & Solar LtdElectricians
- Paul's Carpet LtdFloor and wall tilers
- Jack of All Trades Iw LtdCleaning companies
Also registered at this address
8 other companies use the same registered office as Clarke's Mechanical Limited.
- Dees Scaffold LimitedScaffolders
- Efficient LED Solutions UK LimitedElectricians
- Gemstar Associates LimitedMechanics and garages
- GJC (Iw) LtdProperty developers
- Norton Residential LimitedProperty developers
- R J H Building Services LimitedBuilders
- S.J. Clarke's Construction (I.O.W.) LimitedCivil engineering
- Wight Hart Developments LtdProperty developers
What happens if Clarke's Mechanical Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 02939373
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 June 1994 (32 years ago)
- Registered office
- 9 ST Johns Place, Newport, Isle of Wight, PO30 1LH
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 13 June 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Newport
Other active civil engineering contractors registered in Newport.
- Core Groundworks & Utilities Ltd2018
- CRM Services Shropshire Limited2026
- CS Utility Contractors Limited2013
- D J L Rail Limited2018
- Ddga Ltd2021
- Derek Kilbride Limited2017
- Dno Engineering Limited2013
- Dobar Services Limited2014
All civil engineering contractors in Newport · All trades in Newport · Civil engineering across the UK
Frequently asked questions
When are Clarke's Mechanical Limited's accounts due?
Clarke's Mechanical Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Clarke's Mechanical Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Clarke's Mechanical Limited still trading?
Clarke's Mechanical Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Clarke's Mechanical Limited do?
Clarke's Mechanical Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Clarke's Mechanical Limited?
Clarke's Mechanical Limited was incorporated on 15 June 1994, 32 years ago.
Has Clarke's Mechanical Limited won public sector contracts?
Yes. Clarke's Mechanical Limited has 4 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £589K), most recently from Isle of Wight.
What is the penalty if Clarke's Mechanical Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Clarke's Mechanical Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.