- Company number
- 12525641
- Incorporated
- 19 Mar 20206 years trading
- Registered office
- 167 169 Great Portland Street, 5TH Floor, London, W1W 5PF
- Nature of business
- Construction of domestic buildings
Cubanbuilder Ltd is a 6-year-old private limited company registered in London, company number 12525641, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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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 £1,700 (+2.5%) on the year before, to £69K.
- Net assets rose in 5 of 5 year-on-year comparisons on record.
- Current assets of £116K against £112K owed within a year: 1.0 times cover.
- 5 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £69K | £116K | £112K | 5 | |
| 31 Mar 2024 | £67K | £152K | £147K | 5 | |
| 31 Mar 2023 | £57K | £181K | £176K | 7 | |
| 31 Mar 2022 | £39K | £91K | £83K | 4 | |
| 31 Mar 2021 | £18K | £56K | £49K | 4 | |
| 19 Mar 2020 | £0 | £0 |
Where Cubanbuilder Ltd is registered
The registered office is in London (W1W), in the Westminster local authority area, London. Show W1W 5PF on a map.
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Shared registered office
1,494 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Cubanbuilder 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 12525641
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 March 2020 (6 years ago)
- Registered office
- 167 169 Great Portland Street, 5TH Floor, London, W1W 5PF
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 24 January 2026
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.
- Cube & Circle Ltd2025
- Cube Building Interiors Limited2015
- Cube Construction Pro Ltd2026
- Cubic Construction Services Ltd2025
- Cubitt Limited2008
- Cuja Services Limited2021
- Cullen Brickwork Ltd2026
- Cuongkbuilder Limited2020
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Cubanbuilder Ltd's accounts due?
Cubanbuilder Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Cubanbuilder Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Cubanbuilder Ltd still trading?
Cubanbuilder 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 Cubanbuilder Ltd do?
Cubanbuilder Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Cubanbuilder Ltd?
Cubanbuilder Ltd was incorporated on 19 March 2020, 6 years ago.
What is the penalty if Cubanbuilder 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 Cubanbuilder 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.