- Companies
- Specialist contractors
- London
- &Mortar Ltd
&Mortar Ltd
- Company number
- 15999371
- Incorporated
- 4 Oct 20242 years trading
- Registered office
- 201 Borough High Street, London, SE1 1JA
- Nature of business
- Other specialised construction activities n.e.c.
&Mortar Ltd is a 2-year-old private limited company registered in London, company number 15999371, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 October 2025, as filed at Companies House.
Where &Mortar Ltd is registered
The registered office is in London (SE1), in the Southwark local authority area, London. Show SE1 1JA on a map.
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Also registered at this address
2 other companies use the same registered office as &Mortar Ltd.
- 2MG Property (UK) LimitedInstallers
- Element Building Consultancy LtdSpecialist contractors
What happens if &Mortar 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 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
- 15999371
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 October 2024 (2 years ago)
- Registered office
- 201 Borough High Street, London, SE1 1JA
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 3 October 2025
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- 'Cba Design Studio Ltd2018
- 100MM Limited2026
- 123 Surveyors Ltd2021
- 15 Square Meter Ltd2019
- 16-18 Paxton Place Limited2015
- 16354520 Ltd2025
- 1809 Limited2025
- 186Light Ltd2025
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are &Mortar Ltd's accounts due?
&Mortar Ltd's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is &Mortar Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is &Mortar Ltd still trading?
&Mortar 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 &Mortar Ltd do?
&Mortar Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is &Mortar Ltd?
&Mortar Ltd was incorporated on 4 October 2024, 2 years ago.
What is the penalty if &Mortar 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 &Mortar 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.