- Companies
- Property developers
- London
- Six Boiler House Limited
Six Boiler House Limited
- Company number
- 11232725
- Incorporated
- 5 Mar 20188 years trading
- Registered office
- 83-85 Baker Street, London, W1U 6AG
- Nature of business
- Development of building projects
Six Boiler House Limited is a 8-year-old private limited company registered in London, company number 11232725, one of 14,100 property development companies in London. Its next accounts are due at Companies House on 30 December 2026, and the CT600 for the period to 30 March 2026 is due at HMRC on 30 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 £5,452 (+26.9%) on the year before, to £26K.
- Net assets rose in 5 of 6 year-on-year comparisons on record.
- Current assets of £513 against £262K owed within a year: 0.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Mar 2025 | £26K | £100 | £513 | £262K | 0 |
| 30 Mar 2024 | £20K | £100 | £808 | £268K | 1 |
| 30 Mar 2023 | £16K | £100 | £2,231 | £273K | 1 |
| 30 Mar 2022 | £12K | £100 | £1,766 | £277K | 1 |
| 30 Mar 2021 | £5,988 | £100 | £1,067 | £283K | 1 |
| 30 Mar 2020 | £6,422 | £100 | £1,226 | £282K | 1 |
| 30 Mar 2019 | £2,748 | £100 | £285K |
Where Six Boiler House Limited is registered
The registered office is in London (W1U), in the Westminster local authority area, London. Show W1U 6AG on a map.
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Also registered at this address
20 other companies use the same registered office as Six Boiler House Limited.
- 22 Grosvenor Hill Court LimitedProperty developers
- 22 Mount Street Mayfair LimitedProperty developers
- Bund Contracting LimitedSpecialist contractors
- Cad Stairs LimitedJoiners and carpenters
- Capitalise LimitedProperty developers
- Centurion UK LtdMotor traders
- Citywide Properties LimitedProperty developers
- Custom Vehicles LimitedMotor traders
- Farnsworth Company Limited(the)Property developers
- Global Vision Estate LimitedProperty developers
- Harman Avenue Estates LimitedProperty developers
- Hillbridge Estates LimitedMotor traders
- Marylebone Assets LtdProperty developers
- Marylebone Assetz LtdProperty developers
- Marylebone Azzets LtdProperty developers
- Peart Estates LimitedProperty developers
- Rupa International LimitedMotor traders
- The Wikwest LtdProperty developers
- Two Boiler House LimitedProperty developers
- UK Airbag Servicing LimitedMechanics and garages
What happens if Six Boiler House Limited 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 30 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Dec 2026 to 30 Jan 2027 | £150 |
| 1 to 3 months late | 31 Jan 2027 to 30 Mar 2027 | £375 |
| 3 to 6 months late | 31 Mar 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 | 31 Mar 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 | 30 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
- 11232725
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 March 2018 (8 years ago)
- Registered office
- 83-85 Baker Street, London, W1U 6AG
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 30 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 March 2025
- Last confirmation statement
- 14 March 2026
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in London
Other active property development companies registered in London.
- Six Points Bushey Limited2026
- Six Points Se7 Ltd2021
- Sixthart Ltd2017
- SJ Blossom Property Development Ltd2022
- SJ Construct Ltd2025
- SJ Consulting & Construction Ltd2023
- SJ Design & Constructions Ltd2026
- SJ Living Ltd2025
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Six Boiler House Limited's accounts due?
Six Boiler House Limited's next accounts are due at Companies House by 30 December 2026 (in 77 days), covering the period to 30 March 2026.
When is Six Boiler House Limited's CT600 due?
The CT600 for the period to 30 March 2026 is due at HMRC by 30 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 December 2026.
Is Six Boiler House Limited still trading?
Six Boiler House Limited 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 Six Boiler House Limited do?
Six Boiler House Limited is registered under Development of building projects (SIC 41100).
How old is Six Boiler House Limited?
Six Boiler House Limited was incorporated on 5 March 2018, 8 years ago.
What is the penalty if Six Boiler House Limited 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 Six Boiler House Limited 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.