- Companies
- Plumbers and heating engineers
- Royston
- Insink Plumbing & Heating Limited
Insink Plumbing & Heating Limited
- Company number
- 10644940
- Incorporated
- 1 Mar 20179 years trading
- Registered office
- 8A Howard Road, Meldreth, Royston, SG8 6LU
- Nature of business
- Plumbing, heat and air-conditioning installation
Insink Plumbing & Heating Limited is a 9-year-old private limited company registered in Royston, company number 10644940, one of 24 plumbing and heating companies in Royston. Its next accounts are due at Companies House on 30 December 2026, and the CT600 for the period to 30 March 2026 is due at HMRC on 30 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the 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 Insink Plumbing & Heating LimitedOr 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.
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 £54K (-92.1%) on the year before, to £4,598.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £21K against £17K owed within a year: 1.3 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Mar 2025 | £4,598 | £76 | £21K | £17K | 2 |
| 31 Mar 2024 | £58K | £25K | £104K | £54K | 2 |
| 31 Mar 2023 | £32K | £70K | £52K | 3 | |
| 31 Mar 2022 | £36K | £54K | £35K | 3 | |
| 31 Mar 2021 | £2,389 | £12K | £11K | 2 |
Who runs and owns Insink Plumbing & Heating Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| M*** R*** | Director | Aug 2021 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| J*** G*** | Director | Mar 2017 | Nov 2023 |
Person with significant control
Where Insink Plumbing & Heating Limited is registered
The registered office is in Royston (SG8), in the South Cambridgeshire local authority area, East of England. Show SG8 6LU on a map.
Other trade companies in SG8
- MPC Cars LtdMechanics and garages
- CB Composite LtdMachinery repair and installation
- Energy 0 (Zero) LimitedProperty developers
- Common Lane LtdProperty developers
- Florina Claudia Motorsport LtdMechanics and garages
- Honeycomp LtdMachinery repair and installation
- All-Good Aviation LtdMachinery repair and installation
- Acb LtdBuilders
What happens if Insink Plumbing & Heating 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 30 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Dec 2026 to 30 Jan 2027 | £150 |
| 1 to 3 months late | 31 Jan 2027 to 30 Mar 2027 | £375 |
| 3 to 6 months late | 31 Mar 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 | 31 Mar 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 | 30 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
- 10644940
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 March 2017 (9 years ago)
- Registered office
- 8A Howard Road, Meldreth, Royston, SG8 6LU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 March 2025
- Last confirmation statement
- 28 February 2026
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 Royston
Other active plumbing and heating companies registered in Royston.
- J.J.A.Y Gas & Oil Heating Services Limited2016
- JNB Plumbing & Heating Limited2019
- Libra Mechanical Services Limited2014
- Lodge Plumbing & Heating Services Ltd2016
- MK Plumbing and Drainage Ltd2016
- Parrmolloy Mechanical Ltd2025
- Pear Plumbing and Heating Limited2024
- PMC Heating and Plumbing Ltd2017
All plumbing and heating companies in Royston · All trades in Royston · Plumbers and heating engineers across the UK
Frequently asked questions
When are Insink Plumbing & Heating Limited's accounts due?
Insink Plumbing & Heating Limited's next accounts are due at Companies House by 30 December 2026 (in 77 days), covering the period to 30 March 2026.
When is Insink Plumbing & Heating Limited's CT600 due?
The CT600 for the period to 30 March 2026 is due at HMRC by 30 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 December 2026.
Is Insink Plumbing & Heating Limited still trading?
Insink Plumbing & Heating 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 Insink Plumbing & Heating Limited do?
Insink Plumbing & Heating Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Insink Plumbing & Heating Limited?
Insink Plumbing & Heating Limited was incorporated on 1 March 2017, 9 years ago.
Who runs Insink Plumbing & Heating Limited?
Insink Plumbing & Heating Limited has 1 active director, the longest-serving appointed in Aug 2021. Their names and service addresses are on the Companies House register.
Who owns Insink Plumbing & Heating Limited?
One person or company has significant control of Insink Plumbing & Heating Limited: an individual (owns 25% to 50% of the shares).
What is the penalty if Insink Plumbing & Heating 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 Insink Plumbing & Heating 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.