- Companies
- Facilities management
- London
- Serna London Ltd
Serna London Ltd
- Company number
- 07631729
- Incorporated
- 12 May 201115 years trading
- Registered office
- c/o Serna Cleaning, 85-87 Bayham Street, London, NW1 0AG
- Nature of business
- Combined facilities support activities; General cleaning of buildings; Other building and industrial cleaning activities
Serna London Ltd is a 15-year-old private limited company registered in London, company number 07631729, one of 689 facilities management companies in London. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 £174K (-192.9%) on the year before, to -£84K.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- Current assets of £521K against £535K owed within a year: 1.0 times cover.
- 128 employees on average during the year.
- 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 |
|---|---|---|---|---|---|
| 30 Jun 2025 | -£84K | £3,933 | £521K | £535K | 128 |
| 30 Jun 2024 | £90K | £864 | £625K | £446K | 128 |
| 30 Jun 2023 | £109K | £121K | £698K | £552K | 128 |
| 30 Jun 2022 | £155K | £53K | £599K | £393K | 128 |
| 30 Jun 2021 | £139K | £143K | £461K | £257K | 128 |
| 30 Jun 2020 | £64K | £229K | £495K | £382K | 114 |
| 30 Jun 2019 | 119 | ||||
| 30 Jun 2018 | £19K | £119K | £388K | £230K | 64 |
| 30 Jun 2017 | £37K | £20K | £227K | £130K | 76 |
| 30 Jun 2016 | £6,759 | £16K | £220K | £147K |
Public contracts won
Serna London Ltd has one public sector contract award on record (2024). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| In-Tend Limited | Framework Agreement For Property Cleaning Services - AWARD | Ceiling, not shown | 1 Jul 2024 |
Where Serna London Ltd is registered
The registered office is in London (NW1), in the Camden local authority area, London. Show NW1 0AG on a map.
Other trade companies in NW1
- Carlark LimitedMotor traders
- Daniel’S Renovations LtdBuilders
- Al Fattah Cars LimitedMotor traders
- Amna Enterprises LtdMotor traders
- Mo Dynasty (Claygate) LimitedProperty developers
- Borough High Street Development LimitedProperty developers
- Vartia Builders LimitedBuilders
- Wise Men Construction LtdBuilders
Also registered at this address
3 other companies use the same registered office as Serna London Ltd.
- Hox Devs LtdBuilders
- LH Leadwork & Roofing LtdRoofers
- Sage Facilities LtdPlumbers and heating engineers
What happens if Serna London 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 07631729
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 May 2011 (15 years ago)
- Registered office
- c/o Serna Cleaning, 85-87 Bayham Street, London, NW1 0AG
- Nature of business
- Combined facilities support activities (SIC 81100)
General cleaning of buildings (SIC 81210)
Other building and industrial cleaning activities (SIC 81229) - Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 27 August 2026
- Charges (mortgages)
- 1 outstanding of 4 registered
Filing notes for facilities management companies
Facilities management companies usually invoice on contract, so accrued income and deferred income matter at the year end.
Similar companies in London
Other active facilities management companies registered in London.
- Servcore Group Ltd2025
- Servesify Ltd2017
- Service Demand Group Ltd2026
- Service Robots Group Ltd2026
- Serviflex Limited2024
- Serviqoproperty Ltd2026
- Servlinks Ltd2014
- Sgal Group Ltd2026
All facilities management companies in London · All trades in London · Facilities management across the UK
Frequently asked questions
When are Serna London Ltd's accounts due?
Serna London Ltd's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Serna London Ltd's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Serna London Ltd still trading?
Serna London 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 Serna London Ltd do?
Serna London Ltd is registered under Combined facilities support activities (SIC 81100); General cleaning of buildings (SIC 81210); Other building and industrial cleaning activities (SIC 81229).
How old is Serna London Ltd?
Serna London Ltd was incorporated on 12 May 2011, 15 years ago.
Has Serna London Ltd won public sector contracts?
Yes. Serna London Ltd has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from IN-TEND LIMITED.
What is the penalty if Serna London 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 Serna London 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.