- Companies
- Specialist contractors
- Manchester
- Rat Lab Ltd
Rat Lab Ltd
- Company number
- 16242646
- Incorporated
- 10 Feb 20251 year trading
- Registered office
- Apartment N S 305, Royal Mills, 2, Cotton Street, Manchester, M4 5BD
- Nature of business
- Other specialised construction activities n.e.c.
Rat Lab Ltd is a 1-year-old private limited company registered in Manchester, company number 16242646, one of 429 specialist construction companies in Manchester. Its next accounts are due at Companies House on 10 November 2026, and its first CT600 is due at HMRC on 9 February 2027.
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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Who runs and owns Rat Lab Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| L*** K*** | Director | Feb 2025 |
Person with significant control
Where Rat Lab Ltd is registered
The registered office is in Manchester (M4), in the Manchester local authority area, North West. Show M4 5BD on a map.
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- Location Routes Land & Property LtdProperty developers
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- Ultra Roofing & Guttering LtdRoofers
- Weathertech Roofing & Guttering LtdRoofers
What happens if Rat Lab 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 10 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 11 Nov 2026 to 10 Dec 2026 | £150 |
| 1 to 3 months late | 11 Dec 2026 to 10 Feb 2027 | £375 |
| 3 to 6 months late | 11 Feb 2027 to 10 May 2027 | £750 |
| More than 6 months late | From 11 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 16242646
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 February 2025 (1 year ago)
- Registered office
- Apartment N S 305, Royal Mills, 2, Cotton Street, Manchester, M4 5BD
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 28 February (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 Manchester
Other active specialist construction companies registered in Manchester.
- Rathbone Property Services Limited2013
- Recomac Sports Limited2008
- Red Co-Operative Ltd2014
- Retrofit Fire Sprinklers Ltd2017
- Rightbuilderco Ltd2026
- Rightway Access Limited2008
- Rising Global UK Ltd2023
- Riyadh Al-Zuhairi for Investment Ltd2026
All specialist construction companies in Manchester · All trades in Manchester · Specialist contractors across the UK
Frequently asked questions
When are Rat Lab Ltd's accounts due?
Rat Lab Ltd's next accounts are due at Companies House by 10 November 2026 (in 29 days), covering the period to 28 February 2026.
When is Rat Lab 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 9 February 2026, due by 9 February 2027, and one for the period to 28 February 2026, due by 28 February 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Rat Lab Ltd still trading?
Rat Lab Ltd is listed as active on the Companies House register (checked 12 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 Rat Lab Ltd do?
Rat Lab Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Rat Lab Ltd?
Rat Lab Ltd was incorporated on 10 February 2025, 1 year ago.
Who runs Rat Lab Ltd?
Rat Lab Ltd has 1 active director, the longest-serving appointed in Feb 2025. Their names and service addresses are on the Companies House register.
Who owns Rat Lab Ltd?
One person or company has significant control of Rat Lab Ltd: an individual (owns 75% or more of the shares).
What is the penalty if Rat Lab 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 Rat Lab Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.