- Companies
- Builders
- Northampton
- Rubicon Building Ltd
Rubicon Building Ltd
- Company number
- 11780905
- Incorporated
- 22 Jan 20197 years trading
- Registered office
- 52 the Ridings, Grange Park, Northampton, NN4 5BN
- Nature of business
- Construction of commercial buildings; Other building completion and finishing
Rubicon Building Ltd is a 7-year-old private limited company registered in Northampton, company number 11780905, one of 586 building contractors in Northampton. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £958 (-2.8%) on the year before, to -£35K.
- Net assets rose in 2 of 6 year-on-year comparisons on record.
- Current assets of £4,348 against £41K owed within a year: 0.1 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | -£35K | £4,348 | £41K | 0 | |
| 31 Dec 2024 | -£34K | £5,745 | £10K | £35K | 2 |
| 31 Dec 2023 | -£21K | £4,517 | £12K | £19K | 2 |
| 31 Dec 2022 | -£29K | £7,026 | £13K | £23K | 0 |
| 31 Dec 2021 | -£6,463 | £14K | £39K | £22K | 2 |
| 31 Dec 2020 | -£9,729 | £38K | £20K | 2 | |
| 31 Dec 2019 | £3,535 | £568 | £12K | £8,820 |
Where Rubicon Building Ltd is registered
The registered office is in Northampton (NN4), in the West Northamptonshire local authority area, East Midlands. Show NN4 5BN on a map.
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- BM Automotive Group LtdMechanics and garages
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What happens if Rubicon Building 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 11780905
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 January 2019 (7 years ago)
- Registered office
- 52 the Ridings, Grange Park, Northampton, NN4 5BN
- Nature of business
- Construction of commercial buildings (SIC 41201)
Other building completion and finishing (SIC 43390) - Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 1 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 Northampton
Other active building contractors registered in Northampton.
- S & P Projects and Developments Limited2007
- S Macswan Building & Design Ltd2016
- S. R. Gill Builders Limited2016
- S.D.D.Brickwork Ltd2023
- S.E. Advanced Builder Ltd2021
- Sa Drylining Ltd2011
- Samson MD Ltd2026
- Sav Construction Ltd2023
All building contractors in Northampton · All trades in Northampton · Builders across the UK
Frequently asked questions
When are Rubicon Building Ltd's accounts due?
Rubicon Building Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Rubicon Building Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Rubicon Building Ltd still trading?
Rubicon Building 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 Rubicon Building Ltd do?
Rubicon Building Ltd is registered under Construction of commercial buildings (SIC 41201); Other building completion and finishing (SIC 43390).
How old is Rubicon Building Ltd?
Rubicon Building Ltd was incorporated on 22 January 2019, 7 years ago.
What is the penalty if Rubicon Building 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 Rubicon Building 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.