- Companies
- Electricians
- Sidcup
- Three Sons Fire Safety Ltd
Three Sons Fire Safety Ltd
- Company number
- 16660147
- Incorporated
- 19 Aug 20251 year trading
- Registered office
- 139 Faraday Avenue, Sidcup, DA14 4JE
- Nature of business
- Electrical installation
Three Sons Fire Safety Ltd is a 1-year-old private limited company registered in Sidcup, company number 16660147, one of 178 electrical contractors in Sidcup. Its next accounts are due at Companies House on 19 May 2027, and its first CT600 is due at HMRC on 18 August 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
File the first accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Three Sons Fire Safety LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Where Three Sons Fire Safety Ltd is registered
The registered office is in Sidcup (DA14), in the Bexley local authority area, London. Show DA14 4JE on a map.
Other trade companies in DA14
- Evlor LtdElectricians
- Pfe Services LimitedElectricians
- CJM Property Services LimitedFinishing trades
- Top Local Trader LtdBuilders
- Bassett Electrical Group LimitedElectricians
- Flatline Flooring LtdFloor and wall tilers
- LDT Service's LimitedScaffolders
- Old Maidstone Road Hand Car Wash LtdMechanics and garages
What happens if Three Sons Fire Safety 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 19 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 20 May 2027 to 19 Jun 2027 | £150 |
| 1 to 3 months late | 20 Jun 2027 to 19 Aug 2027 | £375 |
| 3 to 6 months late | 20 Aug 2027 to 19 Nov 2027 | £750 |
| More than 6 months late | From 20 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 16660147
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 August 2025 (1 year ago)
- Registered office
- 139 Faraday Avenue, Sidcup, DA14 4JE
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 18 August 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 Sidcup
Other active electrical contractors registered in Sidcup.
- TPL Electrical Limited2025
- Triumph Building Services Ltd2023
- TSLM Electrical Contractors Ltd2026
- Twisted Tech Solutions Limited2018
- Tydeman Controls Ltd2017
- Ung Electrical Ltd2026
- Unitec Building Services Ltd2013
- Vartia Electrics Ltd2022
All electrical contractors in Sidcup · All trades in Sidcup · Electricians across the UK
Frequently asked questions
When are Three Sons Fire Safety Ltd's accounts due?
Three Sons Fire Safety Ltd's next accounts are due at Companies House by 19 May 2027 (in 218 days), covering the period to 31 August 2026.
When is Three Sons Fire Safety Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 18 August 2026, due by 18 August 2027, and one for the period to 31 August 2026, due by 31 August 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Three Sons Fire Safety Ltd still trading?
Three Sons Fire Safety 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 Three Sons Fire Safety Ltd do?
Three Sons Fire Safety Ltd is registered under Electrical installation (SIC 43210).
How old is Three Sons Fire Safety Ltd?
Three Sons Fire Safety Ltd was incorporated on 19 August 2025, 1 year ago.
What is the penalty if Three Sons Fire Safety 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 Three Sons Fire Safety 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.