- Companies
- Plumbers and heating engineers
- London
- Sonic Frost Limited
Sonic Frost Limited
- Company number
- 06863877
- Incorporated
- 31 Mar 200917 years trading
- Registered office
- Space House Business Centre Suite 29, Abbey Road, London, Greater London, NW10 7SU
- Nature of business
- Plumbing, heat and air-conditioning installation
Sonic Frost Limited is a 17-year-old private limited company registered in London, company number 06863877, one of 2,972 plumbing and heating companies in London. Companies House shows its accounts as overdue: they were due on 30 April 2026.
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 £11K (-8.7%) on the year before, to £115K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £209K against £79K owed within a year: 2.6 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2015 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2024 | £115K | £209K | £79K | 2 | |
| 30 Apr 2023 | £126K | £215K | £87K | 2 | |
| 30 Apr 2022 | £46K | £124K | £69K | 2 | |
| 31 Mar 2021 | £45K | £117K | £64K | 2 | |
| 31 Mar 2020 | £24K | £64K | £49K | 2 | |
| 31 Mar 2019 | £24K | £57K | £45K | ||
| 31 Mar 2018 | £11K | £63K | £63K | ||
| 31 Mar 2017 | £7,192 | £57K | £44K | ||
| 31 Mar 2016 | £8,329 | £28K | £57K | £52K | |
| 31 Mar 2015 | £4,499 | £15K | £45K | £44K |
Where Sonic Frost Limited is registered
The registered office is in London (NW10), in the Brent local authority area, London. Show NW10 7SU on a map.
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What happens if Sonic Frost Limited files late
If the accounts reach Companies House today, the late filing penalty is £750 (£1,500 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2026 to 31 May 2026 | £150 |
| 1 to 3 months late | 1 Jun 2026 to 31 Jul 2026 | £375 |
| 3 to 6 months late | 1 Aug 2026 to 31 Oct 2026 | £750 |
| More than 6 months late | From 1 Nov 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2026 | £200 |
| 3 months late | 31 Oct 2026 | another £200 |
| 6 months late | 31 Jan 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 2027 | 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
- 06863877
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 31 March 2009 (17 years ago)
- Registered office
- Space House Business Centre Suite 29, Abbey Road, London, Greater London, NW10 7SU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2024
- Last confirmation statement
- 31 March 2026
- Previous names
- Sonic Frost Refrigeration & Air Conditioning Systems Limited (until 7 Nov 2009)
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in London
Other active plumbing and heating companies registered in London.
- Sonyside Ltd2026
- Sos Heating & Plumbing Ltd2008
- Sos Plumbers Ltd2026
- South East Plumbing Ltd2023
- South Flow Plumbing & Heating Limited2025
- South London & Surrey Gas and Heating Ltd2023
- South London Heating Limited2007
- South Star Plumbers Limited2018
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Sonic Frost Limited's accounts due?
Sonic Frost Limited's accounts were due at Companies House on 30 April 2026 and the register shows them as overdue.
When is Sonic Frost 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 30 April 2025, due by 30 April 2026, and one for the period to 31 July 2025, due by 31 July 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is Sonic Frost Limited still trading?
Sonic Frost Limited is listed as active on the Companies House register (checked 13 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 Sonic Frost Limited do?
Sonic Frost Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Sonic Frost Limited?
Sonic Frost Limited was incorporated on 31 March 2009, 17 years ago.
What is the penalty if Sonic Frost 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 Sonic Frost Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.