- Companies
- Joiners and carpenters
- Base Mountain Formwork Ltd
Base Mountain Formwork Ltd
- Company number
- 17480844
- Incorporated
- 25 Sep 2026
- Registered office
- 104 Dyers Lane, Putney, London, SW156JU
- Nature of business
- Joinery installation
Base Mountain Formwork Ltd is a newly incorporated private limited company registered in Putney, company number 17480844, one of the UK's joinery companies. Its next accounts are due at Companies House on 25 June 2028, and its first CT600 is due at HMRC on 24 September 2028.
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 Base Mountain Formwork Ltd is registered
The registered office is in Putney (SW15). Show SW156JU on a map.
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What happens if Base Mountain Formwork 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 25 June 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 26 Jun 2028 to 25 Jul 2028 | £150 |
| 1 to 3 months late | 26 Jul 2028 to 25 Sep 2028 | £375 |
| 3 to 6 months late | 26 Sep 2028 to 25 Dec 2028 | £750 |
| More than 6 months late | From 26 Dec 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2028 | £200 |
| 3 months late | 30 Dec 2028 | another £200 |
| 6 months late | 30 Mar 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 2029 | 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
- 17480844
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 September 2026
- Registered office
- 104 Dyers Lane, Putney, London, SW156JU
- Nature of business
- Joinery installation (SIC 43320)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for joinery companies
Joinery companies can carry stock and work in progress at the year end, especially bespoke workshop work, and that figure moves the profit for the year.
Similar companies
Other active joinery companies.
Frequently asked questions
When are Base Mountain Formwork Ltd's accounts due?
Base Mountain Formwork Ltd's next accounts are due at Companies House by 25 June 2028 (in 622 days), covering the period to 30 September 2027.
When is Base Mountain Formwork 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 24 September 2027, due by 24 September 2028, and one for the period to 30 September 2027, due by 30 September 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Base Mountain Formwork Ltd still trading?
Base Mountain Formwork 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 Base Mountain Formwork Ltd do?
Base Mountain Formwork Ltd is registered under Joinery installation (SIC 43320).
How old is Base Mountain Formwork Ltd?
Base Mountain Formwork Ltd was incorporated on 25 September 2026, less than a year ago.
What is the penalty if Base Mountain Formwork 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 Base Mountain Formwork 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.