- Companies
- Mechanics and garages
- Hull
- Diagnostic Developments Ltd
Diagnostic Developments Ltd
- Company number
- 12474647
- Incorporated
- 20 Feb 20206 years trading
- Registered office
- Unit 3 Applegarth Road, Spyvee Street, Hull, HU8 7JH
- Nature of business
- Maintenance and repair of motor vehicles
Diagnostic Developments Ltd is a 6-year-old private limited company registered in Hull, company number 12474647, one of 212 vehicle repair garages in Hull. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 unchanged on the year before, at £0.
- Net assets rose in 0 of 4 year-on-year comparisons on record.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £0 | £0 | £0 | 0 | |
| 29 Feb 2024 | £0 | £0 | £0 | 0 | |
| 28 Feb 2023 | £0 | £0 | £0 | 0 | |
| 28 Feb 2022 | £0 | £0 | £0 | 0 | |
| 28 Feb 2021 | £3,332 | £0 | £0 | 0 |
Where Diagnostic Developments Ltd is registered
The registered office is in Hull (HU8), in the Kingston upon Hull, City of local authority area, Yorkshire and The Humber. Show HU8 7JH on a map.
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What happens if Diagnostic Developments 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 12474647
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 February 2020 (6 years ago)
- Registered office
- Unit 3 Applegarth Road, Spyvee Street, Hull, HU8 7JH
- Nature of business
- Maintenance and repair of motor vehicles (SIC 45200)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 19 February 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 Hull
Other active vehicle repair garages registered in Hull.
- DMR Auto Centre Ltd2022
- DPF Repair Hull Ltd2020
- Dreamscience Automotive Limited2005
- Drypool MOT and Repair Centre Ltd2013
- Duncan Taylor Ltd2017
- Duracare Products Europe Limited2026
- Duracare Products Limited2020
- East Hull MOT and Repair Centre Limited2019
All vehicle repair garages in Hull · All trades in Hull · Mechanics and garages across the UK
Frequently asked questions
When are Diagnostic Developments Ltd's accounts due?
Diagnostic Developments Ltd's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Diagnostic Developments Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Diagnostic Developments Ltd still trading?
Diagnostic Developments 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 Diagnostic Developments Ltd do?
Diagnostic Developments Ltd is registered under Maintenance and repair of motor vehicles (SIC 45200).
How old is Diagnostic Developments Ltd?
Diagnostic Developments Ltd was incorporated on 20 February 2020, 6 years ago.
What is the penalty if Diagnostic Developments 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 Diagnostic Developments 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.