- Companies
- Electricians
- Caterham
- Smartsparks London Limited
Smartsparks London Limited
- Company number
- 10043490
- Incorporated
- 4 Mar 201610 years trading
- Registered office
- 61 Westway, Caterham, Surrey, CR3 5TQ
- Nature of business
- Electrical installation
Smartsparks London Limited is a 10-year-old private limited company registered in Caterham, company number 10043490, one of 33 electrical contractors in Caterham. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 down £5,193 (-11.8%) on the year before, to £39K.
- Net assets rose in 2 of 8 year-on-year comparisons on record.
- Current assets of £147K against £119K owed within a year: 1.2 times cover.
- 5 employees on average, up from 4 the year before.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £39K | £147K | £119K | 5 | |
| 31 Mar 2024 | £44K | £135K | £87K | 4 | |
| 31 Mar 2023 | £44K | £132K | £75K | 4 | |
| 31 Mar 2022 | £42K | £106K | £41K | 4 | |
| 31 Mar 2021 | £49K | £143K | £61K | 3 | |
| 31 Mar 2020 | £124K | £194K | £74K | 3 | |
| 31 Mar 2019 | £65K | £110K | £48K | 3 | |
| 31 Mar 2018 | £102K | £153K | £54K | 3 | |
| 31 Mar 2017 | £121K | £218K | £102K |
Where Smartsparks London Limited is registered
The registered office is in Caterham (CR3), in the Tandridge local authority area, South East. Show CR3 5TQ on a map.
Other trade companies in CR3
- Epw Group (London) LtdCleaning companies
- Limitless Flooring LtdFloor and wall tilers
- 5 Star Renovation LtdFinishing trades
- Moncur Heating LimitedPlumbers and heating engineers
- Rayce Projects LtdProperty developers
- DDB Building LtdFinishing trades
- Eljayar LimitedLandscapers and gardeners
- Apex Scaffold Services LtdScaffolders
Shared registered office
38 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Smartsparks London 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 10043490
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 March 2016 (10 years ago)
- Registered office
- 61 Westway, Caterham, Surrey, CR3 5TQ
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 19 February 2026
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 Caterham
Other active electrical contractors registered in Caterham.
- Sparkanical Ltd2026
- Stochel Electrical Limited1999
- Summit M&E Solutions Limited2025
- Tailor Made Installs Limited2019
- Think Security Systems Limited2013
- Walker Electricians Ltd2026
- Wirepro Electrical Ltd2024
- 4 Kings Security Limited2001
All electrical contractors in Caterham · All trades in Caterham · Electricians across the UK
Frequently asked questions
When are Smartsparks London Limited's accounts due?
Smartsparks London Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Smartsparks London Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Smartsparks London Limited still trading?
Smartsparks London 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 Smartsparks London Limited do?
Smartsparks London Limited is registered under Electrical installation (SIC 43210).
How old is Smartsparks London Limited?
Smartsparks London Limited was incorporated on 4 March 2016, 10 years ago.
What is the penalty if Smartsparks London 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 Smartsparks London 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.