- Companies
- Builders
- Stockton-on-Tees
- Mammoth Construction Services Ltd
Mammoth Construction Services Ltd
- Company number
- 16817642
- Incorporated
- 29 Oct 2025
- Registered office
- 75 Ragpath Lane, Stockton-on-Tees, TS19 9JW
- Nature of business
- Construction of domestic buildings
Mammoth Construction Services Ltd is a newly incorporated private limited company registered in Stockton-on-Tees, company number 16817642, one of 86 building contractors in Stockton-on-Tees. Its next accounts are due at Companies House on 29 July 2027, and its first CT600 is due at HMRC on 28 October 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 Mammoth Construction Services Ltd is registered
The registered office is in Stockton-on-Tees (TS19), in the Stockton-on-Tees local authority area, North East. Show TS19 9JW on a map.
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What happens if Mammoth Construction 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 29 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Jul 2027 to 29 Aug 2027 | £150 |
| 1 to 3 months late | 30 Aug 2027 to 29 Oct 2027 | £375 |
| 3 to 6 months late | 30 Oct 2027 to 29 Jan 2028 | £750 |
| More than 6 months late | From 30 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 16817642
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 October 2025
- Registered office
- 75 Ragpath Lane, Stockton-on-Tees, TS19 9JW
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 October (accounting reference date)
- Accounts type
- No accounts filed yet
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 Stockton-on-Tees
Other active building contractors registered in Stockton-on-Tees.
- MC Lifting Ltd2026
- MD Joinery and Building Contractors Limited2019
- Meritgrade Limited1976
- MMS Contracting Ltd2026
- Mode Homes Limited2016
- Morley & Green Properties Limited2020
- Newton Installations Ltd2015
- Northeast Construction Solutions Ltd2026
All building contractors in Stockton-on-Tees · All trades in Stockton-on-Tees · Builders across the UK
Frequently asked questions
When are Mammoth Construction Services Ltd's accounts due?
Mammoth Construction Services Ltd's next accounts are due at Companies House by 29 July 2027 (in 289 days), covering the period to 31 October 2026.
When is Mammoth Construction 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 28 October 2026, due by 28 October 2027, and one for the period to 31 October 2026, due by 31 October 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Mammoth Construction Services Ltd still trading?
Mammoth Construction 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 Mammoth Construction Services Ltd do?
Mammoth Construction Services Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Mammoth Construction Services Ltd?
Mammoth Construction Services Ltd was incorporated on 29 October 2025, less than a year ago.
What is the penalty if Mammoth Construction 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 Mammoth Construction 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.