- Companies
- Groundworks and demolition
- Gateshead
- Mammoth Site Investigations Ltd
Mammoth Site Investigations Ltd
- Company number
- 14078550
- Incorporated
- 29 Apr 20224 years trading
- Registered office
- Shadbolt Studios L319 Kingsway North, Team Valley Trading Estate, Gateshead, NE11 0JH
- Nature of business
- Test drilling and boring
Mammoth Site Investigations Ltd is a 4-year-old private limited company registered in Gateshead, company number 14078550, one of 5 groundworks and demolition companies in Gateshead. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 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 Mammoth Site Investigations LtdOr 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 up £4,385 (+14.8%) on the year before, to £34K.
- Current assets of £24K against £11K owed within a year: 2.2 times cover.
- 5 employees on average during the year.
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | £34K | £24K | £11K | 5 | |
| 30 Apr 2024 | £30K | £25K | £11K | 5 | |
| 30 Apr 2023 | £11K | £12K | £15K | 5 |
Where Mammoth Site Investigations Ltd is registered
The registered office is in Gateshead (NE11), in the Gateshead local authority area, North East. Show NE11 0JH on a map.
Other trade companies in NE11
- KB Pointing LtdSpecialist contractors
- MCM Property Solutions LtdBuilders
- Memco Engineering Group LtdCivil engineering
- McHale Landscaping & Building LtdInstallers
- Longstone Lettings LtdProperty developers
- Illyrian Build LtdBuilders
- Dunnington One LimitedElectricians
- Advanced Roofing & Home Improvements LtdRoofers
What happens if Mammoth Site Investigations 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 14078550
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 April 2022 (4 years ago)
- Registered office
- Shadbolt Studios L319 Kingsway North, Team Valley Trading Estate, Gateshead, NE11 0JH
- Nature of business
- Test drilling and boring (SIC 43130)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 29 April 2026
Filing notes for groundworks and demolition companies
Groundworks and demolition companies tend to own heavy plant, so capital allowances and hire purchase liabilities show up in both the accounts and the CT600.
Similar companies in Gateshead
Other active groundworks and demolition companies registered in Gateshead.
- Blackthorn Contracting UK Limited2026
- Cnhelmark Geotechnical Limited2013
- Demon Drillers Limited2008
- Geo - Drill Limited2006
All groundworks and demolition companies in Gateshead · All trades in Gateshead · Groundworks and demolition across the UK
Frequently asked questions
When are Mammoth Site Investigations Ltd's accounts due?
Mammoth Site Investigations Ltd's next accounts are due at Companies House by 31 January 2027 (in 110 days), covering the period to 30 April 2026.
When is Mammoth Site Investigations Ltd's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Mammoth Site Investigations Ltd still trading?
Mammoth Site Investigations 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 Site Investigations Ltd do?
Mammoth Site Investigations Ltd is registered under Test drilling and boring (SIC 43130).
How old is Mammoth Site Investigations Ltd?
Mammoth Site Investigations Ltd was incorporated on 29 April 2022, 4 years ago.
What is the penalty if Mammoth Site Investigations 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 Site Investigations 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.