- Companies
- Specialist contractors
- Northampton
- Sub Blue Ltd
Sub Blue Ltd
- Company number
- 08855818
- Incorporated
- 22 Jan 201412 years trading
- Registered office
- 17 the Rookery, Northampton, Northamptonshire, NN4 5FY
- Nature of business
- Other specialised construction activities n.e.c.
Sub Blue Ltd is a 12-year-old private limited company registered in Northampton, company number 08855818, one of 258 specialist construction companies in Northampton. Its next accounts are due at Companies House on 31 January 2028, and the CT600 for the period to 30 April 2027 is due at HMRC on 30 April 2028.
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 £122K (+139.4%) on the year before, to £210K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £429K against £244K owed within a year: 1.8 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2026 | £210K | £305K | £429K | £244K | 4 |
| 30 Apr 2025 | £88K | £116K | £245K | £155K | 4 |
| 30 Apr 2024 | £143K | £144K | £247K | £94K | 4 |
| 31 Jan 2023 | £142K | £254K | £265K | £103K | 4 |
| 31 Jan 2022 | £15K | £117K | £121K | £126K | 4 |
| 31 Jan 2021 | £5,640 | £72K | £128K | £146K | 4 |
| 31 Jan 2020 | £4,257 | £163K | £200K | £216K | 4 |
| 31 Jan 2019 | £10K | £146K | £190K | £204K | 0 |
| 31 Jan 2018 | £18K | £352K | £380K | £388K | 0 |
| 31 Jan 2017 | £4,443 | £77K | £231K | £257K | 0 |
Where Sub Blue Ltd is registered
The registered office is in Northampton (NN4), in the West Northamptonshire local authority area, East Midlands. Show NN4 5FY on a map.
Other trade companies in NN4
- Marks Performance LtdMotor traders
- Midlands Lifting Services LtdSpecialist contractors
- Collingtree Group LtdBuilders
- Lab Electrical Solutions LtdElectricians
- BM Automotive Group LtdMechanics and garages
- Keenan Rentals LtdProperty developers
- Collingtree Cool LtdPlumbers and heating engineers
- Je Brickwork LtdBuilders
What happens if Sub Blue 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 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2028 to 29 Feb 2028 | £150 |
| 1 to 3 months late | 1 Mar 2028 to 30 Apr 2028 | £375 |
| 3 to 6 months late | 1 May 2028 to 31 Jul 2028 | £750 |
| More than 6 months late | From 1 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2028 | £200 |
| 3 months late | 30 Jul 2028 | another £200 |
| 6 months late | 30 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 08855818
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 January 2014 (12 years ago)
- Registered office
- 17 the Rookery, Northampton, Northamptonshire, NN4 5FY
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2026
- Last confirmation statement
- 22 January 2026
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 Northampton
Other active specialist construction companies registered in Northampton.
- SVT Brickgroup Ltd2026
- T.B. Brickwork Limited2014
- T.G Fencing Limited2022
- The Modern Builder Limited2023
- The Outdoor Chapter Ltd2025
- Thomas (Haulage) Limited1992
- Thomas Robert Consulting Limited2022
- Tip-Top Construction Ltd2019
All specialist construction companies in Northampton · All trades in Northampton · Specialist contractors across the UK
Frequently asked questions
When are Sub Blue Ltd's accounts due?
Sub Blue Ltd's next accounts are due at Companies House by 31 January 2028 (in 476 days), covering the period to 30 April 2027.
When is Sub Blue Ltd's CT600 due?
The CT600 for the period to 30 April 2027 is due at HMRC by 30 April 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2028.
Is Sub Blue Ltd still trading?
Sub Blue 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 Sub Blue Ltd do?
Sub Blue Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Sub Blue Ltd?
Sub Blue Ltd was incorporated on 22 January 2014, 12 years ago.
What is the penalty if Sub Blue 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 Sub Blue 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.