- Company number
- 06590307
- Incorporated
- 12 May 200818 years trading
- Registered office
- 5 Loxwood Close, Three Mile Cross, Reading, RG7 1BX
- Nature of business
- Construction of domestic buildings
Cockburn Building & Groundworks Limited is a 18-year-old private limited company registered in Reading, company number 06590307, one of 426 building contractors in Reading. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Cockburn Building & Groundworks LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £1,788 (-3.7%) on the year before, to £47K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £49K against £21K owed within a year: 2.3 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £47K | £49K | £21K | 2 | |
| 31 Mar 2024 | £49K | £46K | £21K | 2 | |
| 31 Mar 2023 | £44K | £36K | £17K | 2 | |
| 31 Mar 2022 | £41K | £39K | £30K | 2 | |
| 31 Mar 2021 | £38K | £19K | £73K | £72K | 1 |
| 31 Mar 2020 | £20K | £37K | £44K | 1 | |
| 31 Mar 2019 | £24K | £21K | £21K | ||
| 31 Mar 2018 | £22K | £24K | £20K | ||
| 31 Mar 2017 | £14K | £11K | £20K | £27K | |
| 31 Mar 2016 | £1,261 | £6,695 | £11K | £20K |
Where Cockburn Building & Groundworks Limited is registered
The registered office is in Reading (RG7), in the Wokingham local authority area, South East. Show RG7 1BX on a map.
Other trade companies in RG7
- Serenity Park Homes LtdMotor traders
- J Stroud Agricultural LtdProperty developers
- Just Henry Services LtdSpecialist contractors
- The Bugfather LtdCleaning companies
- D Ray Roofing LtdRoofers
- CMK26 LimitedMotor traders
- Solstice Environments LtdPlumbers and heating engineers
- Heston Energy Solutions LimitedElectricians
What happens if Cockburn Building & Groundworks Limited 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 06590307
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 May 2008 (18 years ago)
- Registered office
- 5 Loxwood Close, Three Mile Cross, Reading, RG7 1BX
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 6 May 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 Reading
Other active building contractors registered in Reading.
- Constro Ltd2025
- Construction & MGM Maintenance Ltd2020
- Construction Craft Ltd2018
- Construxa PVT Limited2026
- Cooks 2 Development Limited2023
- Coolmore Projects Ltd2024
- Create CM Limited2019
- CT&J Interiors Ltd2025
All building contractors in Reading · All trades in Reading · Builders across the UK
Frequently asked questions
When are Cockburn Building & Groundworks Limited's accounts due?
Cockburn Building & Groundworks Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Cockburn Building & Groundworks Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Cockburn Building & Groundworks Limited still trading?
Cockburn Building & Groundworks Limited 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 Cockburn Building & Groundworks Limited do?
Cockburn Building & Groundworks Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Cockburn Building & Groundworks Limited?
Cockburn Building & Groundworks Limited was incorporated on 12 May 2008, 18 years ago.
What is the penalty if Cockburn Building & Groundworks Limited 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 Cockburn Building & Groundworks Limited 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.