- Companies
- Mechanics and garages
- Clacton on Sea
- Coastal Diagnostics Ltd
Coastal Diagnostics Ltd
- Company number
- 11905121
- Incorporated
- 26 Mar 20197 years trading
- Registered office
- 61 Station Road, Clacton on Sea, Essex, CO15 1SD
- Nature of business
- Maintenance and repair of motor vehicles
Coastal Diagnostics Ltd is a 7-year-old private limited company registered in Clacton on Sea, company number 11905121, one of the UK's vehicle repair garages. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £154 (+2.6%) on the year before, to £6,149.
- Net assets rose in 3 of 6 year-on-year comparisons on record.
- Current assets of £14K against £7,533 owed within a year: 1.8 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 7 years, 2020 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £6,149 | £1,127 | £14K | £7,533 | 2 |
| 31 Mar 2025 | £5,995 | £351 | £13K | £7,037 | 1 |
| 31 Mar 2024 | £7,953 | £199 | £18K | £10K | 1 |
| 31 Mar 2023 | £4,946 | £2,390 | £17K | £12K | 3 |
| 31 Mar 2022 | £85 | £232 | £14K | £14K | 3 |
| 31 Mar 2021 | £2,390 | £0 | £14K | £12K | 3 |
| 31 Mar 2020 | £2,785 | £208 | £9,196 | £6,411 | 1 |
Where Coastal Diagnostics Ltd is registered
The registered office is in Clacton on Sea (CO15), in the Tendring local authority area, East of England. Show CO15 1SD on a map.
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What happens if Coastal Diagnostics 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 11905121
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 March 2019 (7 years ago)
- Registered office
- 61 Station Road, Clacton on Sea, Essex, CO15 1SD
- Nature of business
- Maintenance and repair of motor vehicles (SIC 45200)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 3 April 2026
Filing notes for vehicle repair garages
Garages hold parts stock and often own diagnostic equipment and ramps, which qualify for capital allowances.
Similar companies in Clacton on Sea
Other active vehicle repair garages registered in Clacton on Sea.
- Crossways Garage Ltd2025
- J & M Motors Clacton Ltd2015
- Mrjep Automotive Repairs & Consultancy Services Ltd2024
All vehicle repair garages in Clacton on Sea · All trades in Clacton on Sea · Mechanics and garages across the UK
Frequently asked questions
When are Coastal Diagnostics Ltd's accounts due?
Coastal Diagnostics Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Coastal Diagnostics Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Coastal Diagnostics Ltd still trading?
Coastal Diagnostics 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 Coastal Diagnostics Ltd do?
Coastal Diagnostics Ltd is registered under Maintenance and repair of motor vehicles (SIC 45200).
How old is Coastal Diagnostics Ltd?
Coastal Diagnostics Ltd was incorporated on 26 March 2019, 7 years ago.
What is the penalty if Coastal Diagnostics 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 Coastal Diagnostics 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.