- Companies
- Installers
- Chelmsford
- Mammoth Bathrooms Limited
Mammoth Bathrooms Limited
- Company number
- 15587357
- Incorporated
- 23 Mar 20242 years trading
- Registered office
- 36 Brook Lane Galleywood, Chelmsford, CM2 8NL
- Nature of business
- Other construction installation
Mammoth Bathrooms Limited is a 2-year-old private limited company registered in Chelmsford, company number 15587357, one of 89 installation companies (insulation, lifts, shutters and similar) in Chelmsford. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 March 2025, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Where Mammoth Bathrooms Limited is registered
The registered office is in Chelmsford (CM2), in the Chelmsford local authority area, East of England. Show CM2 8NL on a map.
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What happens if Mammoth Bathrooms 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 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 | 1 Apr 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 | 31 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
- 15587357
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 March 2024 (2 years ago)
- Registered office
- 36 Brook Lane Galleywood, Chelmsford, CM2 8NL
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 22 March 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Chelmsford
Other active installation companies (insulation, lifts, shutters and similar) registered in Chelmsford.
- My Smart Home Ltd2024
- N. Gresty Ltd1997
- Next Phase Renovations Limited2024
- P.B.Ceilings & Partitions Limited2005
- Padelscape UK Limited2023
- Phase 3 Interiors Ltd2023
- Practical Property Services (London) Limited2008
- Prime Interior Services Ltd2015
All installation companies (insulation, lifts, shutters and similar) in Chelmsford · All trades in Chelmsford · Installers across the UK
Frequently asked questions
When are Mammoth Bathrooms Limited's accounts due?
Mammoth Bathrooms Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Mammoth Bathrooms Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Mammoth Bathrooms Limited still trading?
Mammoth Bathrooms 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 Mammoth Bathrooms Limited do?
Mammoth Bathrooms Limited is registered under Other construction installation (SIC 43290).
How old is Mammoth Bathrooms Limited?
Mammoth Bathrooms Limited was incorporated on 23 March 2024, 2 years ago.
What is the penalty if Mammoth Bathrooms 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 Mammoth Bathrooms 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.