- Companies
- Finishing trades
- Colindale
- B Y Construction Limited
B Y Construction Limited
- Company number
- 11251745
- Incorporated
- 13 Mar 20188 years trading
- Registered office
- 114 Colindale Avenue, Colindale, London, NW9 5GX
- Nature of business
- Other building completion and finishing
B Y Construction Limited is a 8-year-old private limited company registered in Colindale, company number 11251745, one of the UK's building finishing companies. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £8,149 (+36.9%) on the year before, to -£14K.
- Net assets rose in 3 of 6 year-on-year comparisons on record.
- Current assets of £14K against £18K owed within a year: 0.8 times cover.
- 1 employee on average, down from 2 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 Jan 2025 | -£14K | £14K | £18K | 1 | |
| 31 Jan 2024 | -£22K | £9,897 | £23K | 2 | |
| 31 Jan 2023 | -£11K | £35K | 3 | ||
| 31 Jan 2022 | -£1,684 | £32K | £12K | 3 | |
| 31 Jan 2021 | £3,697 | £58K | £11K | 2 | |
| 31 Jan 2020 | £2 | £2 | 0 | ||
| 31 Mar 2019 | -£2 | -£2 |
Where B Y Construction Limited is registered
The registered office is in Colindale (NW9), in the Barnet local authority area, London. Show NW9 5GX on a map.
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Also registered at this address
7 other companies use the same registered office as B Y Construction Limited.
- 105 Golders Green Road LtdProperty developers
- Densco Design & Works LimitedSpecialist contractors
- First GT LimitedMotor traders
- Fortune Doors LimitedFinishing trades
- Greg & Sons LimitedElectricians
- Oxford Development Group LtdProperty developers
- Urban-Wave Developers LimitedProperty developers
What happens if B Y Construction 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 11251745
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 March 2018 (8 years ago)
- Registered office
- 114 Colindale Avenue, Colindale, London, NW9 5GX
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 28 March 2026
Filing notes for building finishing companies
Finishing trade companies cover a wide range of work. Most are micro-entities with simple accounts and a straightforward CT600.
Similar companies in Colindale
Other active building finishing companies registered in Colindale.
All building finishing companies in Colindale · All trades in Colindale · Finishing trades across the UK
Frequently asked questions
When are B Y Construction Limited's accounts due?
B Y Construction Limited's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is B Y Construction Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is B Y Construction Limited still trading?
B Y Construction 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 B Y Construction Limited do?
B Y Construction Limited is registered under Other building completion and finishing (SIC 43390).
How old is B Y Construction Limited?
B Y Construction Limited was incorporated on 13 March 2018, 8 years ago.
What is the penalty if B Y Construction 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 B Y Construction 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.