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- Mercon Ltd
Company profile · Specialist contractors
Mercon Ltd
Mercon Ltd is a 12-year-old private limited company registered in Reading, company number 09139859, one of 131 specialist construction companies in Reading. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 August 2025, as filed at Companies House.
Mercon Ltd over the years
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 £106K (+8%) on the year before, to £1.4M.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £1.4M against £494K owed within a year: 2.9 times cover.
- 4 employees on average, up from 2 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 Aug 2025 | £1.4M | £10K | £1.4M | £494K | 4 |
| 31 Aug 2024 | £1.3M | £207K | £1.6M | £684K | 2 |
| 31 Aug 2023 | £658K | £218K | £976K | £107K | 2 |
| 31 Aug 2022 | £994K | £430K | £1.2M | £210K | 2 |
| 31 Aug 2021 | £706K | £191K | £1.1M | £405K | 2 |
| 31 Aug 2020 | £440K | £63K | £588K | £106K | 3 |
| 31 Aug 2019 | £297K | £415K | £67K | 5 | |
| 31 Aug 2018 | £198K | £239K | £59K | ||
| 31 Jul 2017 | £130K | £247K | £132K | ||
| 31 Jul 2016 | £130K | £51K | £247K | £132K |
Who runs and owns Mercon Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| P*** M*** | Director | Jul 2014 |
Person with significant control
Where Mercon Ltd is registered
The registered office is in Reading (RG1), in the Reading local authority area, South East. Show RG1 6EG on a map.
Other trade companies in RG1
- Mais&Co LtdJoiners and carpenters
- Testt LtdRoofers
- Geminifix LtdFinishing trades
- Rux-1 LtdMotor traders
- Dembek Project Consulting LimitedFinishing trades
- Berkshire Premier Cleaning LtdCleaning companies
- Alpha Pistons LimitedMotor traders
- BH Motors Reading LimitedMechanics and garages
Also registered at this address
1 other company uses the same registered office as Mercon Ltd.
- Laterem LtdBuilders
What happens if Mercon Ltd 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 09139859
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 July 2014 (12 years ago)
- Registered office
- 17 Barrington Way, Reading, RG1 6EG
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 9 July 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Reading
Other active specialist construction companies registered in Reading.
- Montcalm Limited2023
- Mos Construction Limited2015
- Multi-Building Services Power Installations Limited2004
- MW Brickwork & Pointing Limited2024
- Oracle Storage Systems Limited2007
- Otium Construction Ltd2025
- Owlsworth Construction Ltd2008
- Owlsworth Ltd2008
All specialist construction companies in Reading · All trades in Reading · Specialist contractors across the UK
Frequently asked questions
When are Mercon Ltd's accounts due?
Mercon Ltd's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is Mercon Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Mercon Ltd still trading?
Mercon Ltd 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 Mercon Ltd do?
Mercon Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Mercon Ltd?
Mercon Ltd was incorporated on 21 July 2014, 12 years ago.
Who runs Mercon Ltd?
Mercon Ltd has 1 active director, the longest-serving appointed in Jul 2014. Their names and service addresses are on the Companies House register.
Who owns Mercon Ltd?
One person or company has significant control of Mercon Ltd: an individual (owns 75% or more of the shares).
What is the penalty if Mercon Ltd 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 Mercon Ltd 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.