- Companies
- Plumbers and heating engineers
- London
- Parallel Plumbing Ltd
Parallel Plumbing Ltd
- Company number
- 16557001
- Incorporated
- 2 Jul 20251 year trading
- Registered office
- 124 City Road, London, EC1V 2NX
- Nature of business
- Plumbing, heat and air-conditioning installation
Parallel Plumbing Ltd is a 1-year-old private limited company registered in London, company number 16557001, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 2 April 2027, and its first CT600 is due at HMRC on 1 July 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.
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Where Parallel Plumbing Ltd is registered
The registered office is in London (EC1V), in the Islington local authority area, London. Show EC1V 2NX on a map.
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- Cathal Od Solutions LtdSpecialist contractors
Shared registered office
1,047 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 Parallel Plumbing 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 2 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 3 Apr 2027 to 2 May 2027 | £150 |
| 1 to 3 months late | 3 May 2027 to 2 Jul 2027 | £375 |
| 3 to 6 months late | 3 Jul 2027 to 2 Oct 2027 | £750 |
| More than 6 months late | From 3 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 16557001
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 July 2025 (1 year ago)
- Registered office
- 124 City Road, London, EC1V 2NX
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
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.
- Paramount Projects Investors Ltd2025
- Paramount Projects LDN Ltd2021
- Parkair UK (Installations) Ltd2025
- Parker Bathrooms&Plumbing Ltd2026
- Patsons Ac & Refrigeration Limited2026
- Paulmark Ventilation Limited1993
- Pav Heating and Plumbing Ltd2019
- Paxton Services London Limited2000
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Parallel Plumbing Ltd's accounts due?
Parallel Plumbing Ltd's next accounts are due at Companies House by 2 April 2027 (in 172 days), covering the period to 31 July 2026.
When is Parallel Plumbing 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 1 July 2026, due by 1 July 2027, and one for the period to 31 July 2026, due by 31 July 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Parallel Plumbing Ltd still trading?
Parallel Plumbing Ltd is listed as active on the Companies House register (checked 12 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 Parallel Plumbing Ltd do?
Parallel Plumbing Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Parallel Plumbing Ltd?
Parallel Plumbing Ltd was incorporated on 2 July 2025, 1 year ago.
What is the penalty if Parallel Plumbing 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 Parallel Plumbing Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.