- Companies
- Installers
- London
- Build London Ltd
Build London Ltd
- Company number
- 12707456
- Incorporated
- 30 Jun 20206 years trading
- Registered office
- 2 Frederick Street, Kings Cross, London, WC1X 0ND
- Nature of business
- Other construction installation
Build London Ltd is a 6-year-old private limited company registered in London, company number 12707456, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Build London LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £37K (+28.9%) on the year before, to -£92K.
- Net assets rose in 1 of 4 year-on-year comparisons on record.
- Current assets of £77K against £180K owed within a year: 0.4 times cover.
- 5 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | -£92K | £77K | £180K | 5 | |
| 30 Jun 2024 | -£129K | £7,215 | £152K | 5 | |
| 30 Jun 2023 | -£74K | £28K | £102K | 6 | |
| 30 Jun 2022 | -£22K | £13K | £35K | 6 | |
| 30 Jun 2021 | £3,455 | £19K | £20K | 5 |
Where Build London Ltd is registered
The registered office is in London (WC1X), in the Camden local authority area, London. Show WC1X 0ND on a map.
Other trade companies in WC1X
- Mbi Autos LtdMotor traders
- Property Plumbing LtdPlumbers and heating engineers
- Hane House LtdBuilders
- Ags - Atlas Global Services LimitedInstallers
- Desktop Lab LimitedRepair services
- Premium Building Solutions LtdBuilders
- Al Tasleem Roadside Assistance LtdMechanics and garages
- Nextgen Car Wash LtdMechanics and garages
Shared registered office
34 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 Build 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 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 12707456
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 June 2020 (6 years ago)
- Registered office
- 2 Frederick Street, Kings Cross, London, WC1X 0ND
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 29 June 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- Build Mco Ltd2024
- Build More Solutions Ltd2025
- Build Norbury Ltd2026
- Build With Confidence Construction Ltd2017
- Build With Confidence Group Limited2017
- Buildcom Limited2003
- Building Vasilev Ltd2019
- Buildra Ltd2025
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are Build London Ltd's accounts due?
Build London Ltd's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Build London Ltd's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Build London Ltd still trading?
Build 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 Build London Ltd do?
Build London Ltd is registered under Other construction installation (SIC 43290).
How old is Build London Ltd?
Build London Ltd was incorporated on 30 June 2020, 6 years ago.
What is the penalty if Build 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 Build 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.