- Company number
- 12559773
- Incorporated
- 16 Apr 20206 years trading
- Registered office
- 22B 22, Oprington Road, London, N21 3PG
- Nature of business
- Construction of commercial buildings
Bys Construction Ltd is a 6-year-old private limited company registered in London, company number 12559773, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 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 down £1,818 (-64.5%) on the year before, to £1,000.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- 9 employees on average, up from 3 the year before.
- 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 Apr 2025 | £1,000 | 9 | |||
| 30 Apr 2024 | £2,818 | £101 | 3 | ||
| 30 Apr 2023 | £1,505 | 23 | |||
| 30 Apr 2022 | £0 | 3 | |||
| 30 Apr 2021 | £0 |
Where Bys Construction Ltd is registered
The registered office is in London (N21), in the Enfield local authority area, London. Show N21 3PG on a map.
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What happens if Bys Construction 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 12559773
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 April 2020 (6 years ago)
- Registered office
- 22B 22, Oprington Road, London, N21 3PG
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 15 April 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.
- Bystry Construction Limited2012
- Bytrade Construction Ltd2013
- C & B Builder Ltd2026
- C & B Constructions Ltd2017
- C & D Roofing NW Ltd2020
- C A Pavel Ltd2016
- C and B Access Ltd2026
- C C Petre Ltd2019
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Bys Construction Ltd's accounts due?
Bys Construction Ltd's next accounts are due at Companies House by 31 January 2027 (in 111 days), covering the period to 30 April 2026.
When is Bys Construction Ltd's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Bys Construction Ltd still trading?
Bys Construction 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 Bys Construction Ltd do?
Bys Construction Ltd is registered under Construction of commercial buildings (SIC 41201).
How old is Bys Construction Ltd?
Bys Construction Ltd was incorporated on 16 April 2020, 6 years ago.
What is the penalty if Bys Construction 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 Bys Construction 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.