- Companies
- Installers
- Sheffield
- Kirby Security (UK) Limited
Kirby Security (UK) Limited
- Company number
- 01865793
- Incorporated
- 22 Nov 198441 years trading
- Registered office
- 210 White Lane, Sheffield, S12 3GL
- Nature of business
- Other construction installation; Security systems service activities
Kirby Security (UK) Limited is a 41-year-old private limited company registered in Sheffield, company number 01865793, one of 175 installation companies (insulation, lifts, shutters and similar) in Sheffield. 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 up £181K (+50%) on the year before, to £542K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £1.4M against £879K owed within a year: 1.6 times cover.
- 26 employees on average, up from 23 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 Mar 2025 | £542K | £258K | £1.4M | £879K | 26 |
| 31 Mar 2024 | £362K | £251K | £1.3M | £972K | 23 |
| 31 Mar 2023 | £156K | £138K | £788K | £618K | 17 |
| 31 Mar 2022 | £132K | £26K | £516K | £364K | 14 |
| 31 Mar 2021 | £110K | £73K | £352K | £213K | 14 |
| 31 Mar 2020 | £183K | -£88K | £483K | £327K | 12 |
| 31 Mar 2019 | £116K | £46 | £518K | £425K | |
| 31 Mar 2018 | £113K | £46 | £467K | £382K | |
| 31 Mar 2017 | £129K | £46 | |||
| 31 Mar 2016 | £125K | £18K | £417K | £331K |
Where Kirby Security (UK) Limited is registered
The registered office is in Sheffield (S12), in the Sheffield local authority area, Yorkshire and The Humber. Show S12 3GL on a map.
Other trade companies in S12
- Wattam Family Group LtdPlumbers and heating engineers
- A Contract Lift LtdProperty developers
- KD Building Renovations LtdFinishing trades
- C.K Butlers Electrical LtdElectricians
- Drains Pipes Solutions LtdCleaning companies
- J Seale Bathrooms LtdJoiners and carpenters
- J Seale Plumbing and Heating LtdPlumbers and heating engineers
- NM Cleaning Services Ltd LtdCleaning companies
Also registered at this address
1 other company uses the same registered office as Kirby Security (UK) Limited.
- Kirby Electrical LimitedMachinery repair and installation
What happens if Kirby Security (UK) 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
- 01865793
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 November 1984 (41 years ago)
- Registered office
- 210 White Lane, Sheffield, S12 3GL
- Nature of business
- Other construction installation (SIC 43290)
Security systems service activities (SIC 80200) - Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 15 November 2025
- Charges (mortgages)
- 1 outstanding of 2 registered
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Sheffield
Other active installation companies (insulation, lifts, shutters and similar) registered in Sheffield.
- Kiveton Windows Ltd2022
- L A Westley Limited2022
- L.H. Construction Limited1985
- Lambert Installations Limited2023
- Lasc Data Networking Ltd2020
- LDP Surfacing Ltd2021
- LJ Storage Limited2013
- LT Interior Systems Ltd2018
All installation companies (insulation, lifts, shutters and similar) in Sheffield · All trades in Sheffield · Installers across the UK
Frequently asked questions
When are Kirby Security (UK) Limited's accounts due?
Kirby Security (UK) 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 Kirby Security (UK) 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 Kirby Security (UK) Limited still trading?
Kirby Security (UK) 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 Kirby Security (UK) Limited do?
Kirby Security (UK) Limited is registered under Other construction installation (SIC 43290); Security systems service activities (SIC 80200).
How old is Kirby Security (UK) Limited?
Kirby Security (UK) Limited was incorporated on 22 November 1984, 41 years ago.
What is the penalty if Kirby Security (UK) 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 Kirby Security (UK) 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.