Company profile · Builders
Ko Build Ltd
Ko Build Ltd is a 5-year-old private limited company registered in Durham, company number 13167775, one of 120 building contractors in Durham. 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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Financial snapshot, 2025
From the balance sheet at 31 January 2025, as filed at Companies House.
Ko Build Ltd over the years
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 £1,017 (-83%) on the year before, to £208.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- 2 employees on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £208 | £686 | £16K | 2 | |
| 31 Jan 2024 | £1,225 | £4,962 | £12K | £11K | 2 |
| 31 Jan 2023 | £364 | £2,252 | £9,279 | £9,305 | 0 |
| 31 Jan 2022 | £66 | £2,969 | £3,590 | £3,524 | 0 |
Where Ko Build Ltd is registered
The registered office is in Durham (DH1), in the County Durham local authority area, North East. Show DH1 2XJ on a map.
Other trade companies in DH1
- Drives & Patios 4 You LtdLandscapers and gardeners
- Hanser LimitedBuilders
- McCluskey Roofing North East LtdRoofers
- Phone and Laptop Repairs Ne LtdRepair services
- Tyne & Wear Commercial Cleaning LtdCleaning companies
- HZG Projects LimitedCivil engineering
- Damiora Group LtdFacilities management
- James Lawton Homes ( Whickham Farm ) LtdProperty developers
Also registered at this address
1 other company uses the same registered office as Ko Build Ltd.
- Ko Bathrooms LtdPlumbers and heating engineers
What happens if Ko Build 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 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
- 13167775
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 January 2021 (5 years ago)
- Registered office
- 29 Dragonville Industrial Park, Dragon Lane, Durham, Durham, DH1 2XJ
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 2 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 Durham
Other active building contractors registered in Durham.
- Kobe Construction Limited2017
- L R Build Ltd2020
- Ladycraft Limited2002
- LBJ Civils Ltd2025
- Leonard Builders North East Limited2025
- Lignum Construction North East Limited2019
- LKL Construction Ltd2026
- LM Brickworks (Ne) Ltd2021
All building contractors in Durham · All trades in Durham · Builders across the UK
Frequently asked questions
When are Ko Build Ltd's accounts due?
Ko Build Ltd's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is Ko Build Ltd'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 Ko Build Ltd still trading?
Ko Build 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 Ko Build Ltd do?
Ko Build Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Ko Build Ltd?
Ko Build Ltd was incorporated on 29 January 2021, 5 years ago.
What is the penalty if Ko Build 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 Ko Build 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.