- Companies
- Specialist contractors
- Darlington
- Three-6 Building Control Ltd
Three-6 Building Control Ltd
- Company number
- 17412238
- Incorporated
- 20 Aug 2026
- Registered office
- 17 Tebay Close, Darlington, DL1 4JH
- Nature of business
- Other specialised construction activities n.e.c.
Three-6 Building Control Ltd is a newly incorporated private limited company registered in Darlington, company number 17412238, one of 66 specialist construction companies in Darlington. Its next accounts are due at Companies House on 20 May 2028, and its first CT600 is due at HMRC on 19 August 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Three-6 Building Control Ltd is registered
The registered office is in Darlington (DL1), in the Darlington local authority area, North East. Show DL1 4JH on a map.
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- Simply Gleaming LtdCleaning companies
- Sinead the Cleaning Lady LtdCleaning companies
- BB Optichrome LimitedCleaning companies
- JB Car & Commercials LtdMotor traders
- Egtc LtdLandscapers and gardeners
- LSS Contractors Ne LtdCivil engineering
What happens if Three-6 Building Control 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 20 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 21 May 2028 to 20 Jun 2028 | £150 |
| 1 to 3 months late | 21 Jun 2028 to 20 Aug 2028 | £375 |
| 3 to 6 months late | 21 Aug 2028 to 20 Nov 2028 | £750 |
| More than 6 months late | From 21 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2029 | 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
- 17412238
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 August 2026
- Registered office
- 17 Tebay Close, Darlington, DL1 4JH
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Darlington
Other active specialist construction companies registered in Darlington.
- Tica Certification Limited2025
- Tsu Limited2013
- Vanguard Property Care Ltd2026
- VSM Access Ltd2026
- West End Tree and Landscaping Limited2019
- Whessoe Road Aggregates Ltd2025
- Absass Limited2018
- Acnz 2022 Ltd2022
All specialist construction companies in Darlington · All trades in Darlington · Specialist contractors across the UK
Frequently asked questions
When are Three-6 Building Control Ltd's accounts due?
Three-6 Building Control Ltd's next accounts are due at Companies House by 20 May 2028 (in 586 days), covering the period to 31 August 2027.
When is Three-6 Building Control Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 19 August 2027, due by 19 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Three-6 Building Control Ltd still trading?
Three-6 Building Control 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 Three-6 Building Control Ltd do?
Three-6 Building Control Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Three-6 Building Control Ltd?
Three-6 Building Control Ltd was incorporated on 20 August 2026, less than a year ago.
What is the penalty if Three-6 Building Control 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 Three-6 Building Control 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.