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- CSS Electrical & Mechanical Limited
Company profile · Electricians
CSS Electrical & Mechanical Limited
CSS Electrical & Mechanical Limited is a 4-year-old private limited company registered in Sunderland, company number 13705969, one of 97 electrical contractors in Sunderland. Its next accounts are due at Companies House on 31 October 2026, and its first CT600 is due at HMRC on 31 October 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2024
From the balance sheet at 31 October 2024, as filed at Companies House.
CSS Electrical & Mechanical Limited 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 £3,695 on the year before, to £3,697.
- Current assets of £19K against £22K owed within a year: 0.8 times cover.
- 1 employee on average, down from 2 the year before.
- Balance sheets on record for 3 years, 2022 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2024 | £3,697 | £19K | £22K | 1 | |
| 31 Oct 2023 | £2 | £100 | £98 | 2 | |
| 31 Oct 2022 | £2 | £100 | £98 | 2 |
Where CSS Electrical & Mechanical Limited is registered
The registered office is in Sunderland (SR5), in the Sunderland local authority area, North East. Show SR5 2TA on a map.
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- Devlin Electrical Services LtdElectricians
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- Imo Car Wash Washington LtdCleaning companies
- Al Blades LtdMachinery repair and installation
What happens if CSS Electrical & 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 13705969
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 October 2021 (4 years ago)
- Registered office
- North East Bic, Sunderland Enterprise Park, Sunderland, SR5 2TA
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2024
- Last confirmation statement
- 26 October 2025
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Sunderland
Other active electrical contractors registered in Sunderland.
- Deis Services Ltd2023
- Devlin Electrical Services Ltd2026
- Digital Signs Ne Ltd2025
- DJ Electrical Sunderland Limited2016
- DMT Electrical Services Limited2015
- DPS Northern Building and Maintenance Ltd2014
- DT Jointing Ltd2023
- Ecomonkeyne Ltd2022
All electrical contractors in Sunderland · All trades in Sunderland · Electricians across the UK
Frequently asked questions
When are CSS Electrical & Mechanical Limited's accounts due?
CSS Electrical & Mechanical Limited's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is CSS Electrical & Mechanical Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 October 2025, due by 31 October 2026, and one for the period to 31 January 2026, due by 31 January 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is CSS Electrical & Mechanical Limited still trading?
CSS Electrical & 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 CSS Electrical & Mechanical Limited do?
CSS Electrical & Mechanical Limited is registered under Electrical installation (SIC 43210).
How old is CSS Electrical & Mechanical Limited?
CSS Electrical & Mechanical Limited was incorporated on 27 October 2021, 4 years ago.
What is the penalty if CSS Electrical & 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 CSS Electrical & 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.