- Company number
- 16989683
- Incorporated
- 26 Jan 2026
- Registered office
- 23 Brewhouse Road, London, SE18 5SJ
- Nature of business
- Construction of domestic buildings
Add-A-Room London Ltd is a newly incorporated private limited company registered in London, company number 16989683, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 26 October 2027, and its first CT600 is due at HMRC on 25 January 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 Add-A-Room London Ltd is registered
The registered office is in London (SE18), in the Greenwich local authority area, London. Show SE18 5SJ on a map.
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What happens if Add-A-Room London 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 26 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 27 Oct 2027 to 26 Nov 2027 | £150 |
| 1 to 3 months late | 27 Nov 2027 to 26 Jan 2028 | £375 |
| 3 to 6 months late | 27 Jan 2028 to 26 Apr 2028 | £750 |
| More than 6 months late | From 27 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 16989683
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 January 2026
- Registered office
- 23 Brewhouse Road, London, SE18 5SJ
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 January (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 London
Other active building contractors registered in London.
- Addison & Vale Construction Ltd2026
- Addison Crescent Construction Limited2021
- Ade & Aj Construction Limited2023
- Ade Builders Ltd2026
- Ade's Trading Ltd2026
- Adec Building Services Limited2021
- Adelina Alexander Property Management Company Ltd2025
- Adelphi Contractors Limited2026
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Add-A-Room London Ltd's accounts due?
Add-A-Room London Ltd's next accounts are due at Companies House by 26 October 2027 (in 378 days), covering the period to 31 January 2027.
When is Add-A-Room London 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 25 January 2027, due by 25 January 2028, and one for the period to 31 January 2027, due by 31 January 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Add-A-Room London Ltd still trading?
Add-A-Room London 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 Add-A-Room London Ltd do?
Add-A-Room London Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Add-A-Room London Ltd?
Add-A-Room London Ltd was incorporated on 26 January 2026, less than a year ago.
What is the penalty if Add-A-Room London 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 Add-A-Room London 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.