- Companies
- Specialist contractors
- Swindon
- Rock Groundwork Ltd
Rock Groundwork Ltd
- Company number
- 12386377
- Incorporated
- 6 Jan 20206 years trading
- Registered office
- 2-4 Wood Street, Swindon, SN1 4AB
- Nature of business
- Other specialised construction activities n.e.c.
Rock Groundwork Ltd is a 6-year-old private limited company registered in Swindon, company number 12386377, one of 130 specialist construction companies in Swindon. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 up £10K (+50.8%) on the year before, to £31K.
- Net assets rose in 4 of 4 year-on-year comparisons on record.
- Current assets of £14K against £6,017 owed within a year: 2.3 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £31K | £14K | £6,017 | 1 | |
| 31 Jan 2024 | £21K | £4,197 | £21K | 1 | |
| 31 Jan 2023 | £16K | £14K | £17K | 1 | |
| 31 Jan 2022 | £5,611 | £2,933 | £3,810 | 1 | |
| 31 Jan 2021 | -£3,087 | £5,225 | £14K | 1 |
Where Rock Groundwork Ltd is registered
The registered office is in Swindon (SN1), in the Swindon local authority area, South West. Show SN1 4AB on a map.
Other trade companies in SN1
- Terraform Surfacing LimitedSpecialist contractors
- Haq Builders Swindon LtdBuilders
- Yeshi Construction LimitedBuilders
- Built & Bespoke LtdBuilders
- Saxon Property Care LtdBuilders
- DBX Contracts LimitedBuilders
- Hamaazs LtdSpecialist contractors
- E&R Electrics LtdElectricians
Also registered at this address
6 other companies use the same registered office as Rock Groundwork Ltd.
- Bridgemead Builders LtdBuilders
- Cox & Sons Building Contractors LimitedBuilders
- Darren Inglis Bricklaying Services LimitedSpecialist contractors
- Opel Construction LtdProperty developers
- Peare Carpentry Contractors LimitedJoiners and carpenters
- Roca Blue LimitedProperty developers
What happens if Rock Groundwork 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 12386377
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 January 2020 (6 years ago)
- Registered office
- 2-4 Wood Street, Swindon, SN1 4AB
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 5 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 Swindon
Other active specialist construction companies registered in Swindon.
- RWS Energy Limited2007
- S G S Plant Hire Limited2008
- S J Hogg Ltd2013
- Sanderson-Doyle Consultancy Ltd2024
- Sdys Bricklayers Limited2017
- Select Line Carpets & Floorings Limited1990
- SKGK Limited2018
- Spanwright UK Limited2010
All specialist construction companies in Swindon · All trades in Swindon · Specialist contractors across the UK
Frequently asked questions
When are Rock Groundwork Ltd's accounts due?
Rock Groundwork Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Rock Groundwork Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Rock Groundwork Ltd still trading?
Rock Groundwork 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 Rock Groundwork Ltd do?
Rock Groundwork Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Rock Groundwork Ltd?
Rock Groundwork Ltd was incorporated on 6 January 2020, 6 years ago.
What is the penalty if Rock Groundwork 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 Rock Groundwork 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.