- Companies
- Builders
- Colchester
- Mos Plumbing and Heating Services Ltd
Mos Plumbing and Heating Services Ltd
- Company number
- 13109028
- Incorporated
- 4 Jan 20215 years trading
- Registered office
- Balkerne House Second Floor, Office 2, Colchester, CO1 1PA
- Nature of business
- Construction of domestic buildings; Plumbing, heat and air-conditioning installation
Mos Plumbing and Heating Services Ltd is a 5-year-old private limited company registered in Colchester, company number 13109028, one of 312 building contractors in Colchester. Its next accounts are due at Companies House on 31 October 2026, and its first CT600 is due at HMRC on 31 October 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 up £19K (+117.6%) on the year before, to £35K.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 4 years, 2021 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2024 | £35K | £4,750 | £23K | 0 | |
| 31 Oct 2023 | £16K | £0 | £0 | £16K | 0 |
| 31 Oct 2022 | £3,119 | £3,119 | 0 | ||
| 31 Oct 2021 | £3,119 | £2,464 | £655 | 0 |
Where Mos Plumbing and Heating Services Ltd is registered
The registered office is in Colchester (CO1), in the Colchester local authority area, East of England. Show CO1 1PA on a map.
Other trade companies in CO1
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- Sherlock Roofing LtdRoofers
- Savannah Building Developments LtdProperty developers
- Savannah Care Developments LtdProperty developers
- Colchester Autos & Tyres LtdMechanics and garages
- Gripgo LimitedMechanics and garages
- Tamara Homes 2026 LtdProperty developers
- CL and Steels LtdInstallers
What happens if Mos Plumbing and Heating Services 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 13109028
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 January 2021 (5 years ago)
- Registered office
- Balkerne House Second Floor, Office 2, Colchester, CO1 1PA
- Nature of business
- Construction of domestic buildings (SIC 41202)
Plumbing, heat and air-conditioning installation (SIC 43220) - Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2024
- Last confirmation statement
- 21 January 2026
- Previous names
- Mos Plumbing & Building Services Ltd (until 10 Apr 2025)
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Colchester
Other active building contractors registered in Colchester.
- MPM Trade Ltd2020
- MRB Construction Services Limited2015
- MS Lifting Solutions Ltd2017
- Mulberry Green Planning & Design Ltd2026
- Multifix Carpentry & Construction Ltd2021
- N.D. Smith (Contracts) Limited1992
- Nationwide Modular Construction Ltd2025
- Nayland Homes Ltd2018
All building contractors in Colchester · All trades in Colchester · Builders across the UK
Frequently asked questions
When are Mos Plumbing and Heating Services Ltd's accounts due?
Mos Plumbing and Heating Services Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Mos Plumbing and Heating Services 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 31 October 2025, due by 31 October 2026, and one for the period to 31 January 2026, due by 31 January 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Mos Plumbing and Heating Services Ltd still trading?
Mos Plumbing and Heating Services 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 Mos Plumbing and Heating Services Ltd do?
Mos Plumbing and Heating Services Ltd is registered under Construction of domestic buildings (SIC 41202); Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Mos Plumbing and Heating Services Ltd?
Mos Plumbing and Heating Services Ltd was incorporated on 4 January 2021, 5 years ago.
What is the penalty if Mos Plumbing and Heating Services 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 Mos Plumbing and Heating Services 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.