- Companies
- Civil engineering
- Newmarket
- Carolan Utilities Ltd
Carolan Utilities Ltd
- Company number
- 10912508
- Incorporated
- 11 Aug 20179 years trading
- Registered office
- 7 Laureate Paddocks, Newmarket, Suffolk, CB8 0AP
- Nature of business
- Construction of utility projects for electricity and telecommunications
Carolan Utilities Ltd is a 9-year-old private limited company registered in Newmarket, company number 10912508, one of 5 civil engineering contractors in Newmarket. Its next accounts are due at Companies House on 30 May 2027, and the CT600 for the period to 30 August 2026 is due at HMRC on 30 August 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 £15K on the year before, to £15K.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- Current assets of £200K against £180K owed within a year: 1.1 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £15K | £49K | £200K | £180K | 2 |
| 31 Aug 2024 | £263 | £30K | £143K | £146K | 2 |
| 31 Aug 2023 | £398 | £89K | £87K | 2 | |
| 31 Aug 2022 | £1,557 | £92K | £70K | 2 | |
| 31 Aug 2021 | £491 | £74K | £36K | 2 | |
| 31 Aug 2020 | £8,603 | £116K | £90K | 2 | |
| 31 Aug 2019 | £18K | £52K | £67K | £63K | 2 |
| 31 Aug 2018 | £15K | £51K | £54K | £40K | 2 |
Where Carolan Utilities Ltd is registered
The registered office is in Newmarket (CB8), in the West Suffolk local authority area, East of England. Show CB8 0AP on a map.
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Shared registered office
45 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Carolan Utilities 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 May 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 30 Aug 2027 | £375 |
| 3 to 6 months late | 31 Aug 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 Aug 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Aug 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
- 10912508
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 August 2017 (9 years ago)
- Registered office
- 7 Laureate Paddocks, Newmarket, Suffolk, CB8 0AP
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 30 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 10 August 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Newmarket
Other active civil engineering contractors registered in Newmarket.
- J T Wayne Utilities Limited2024
- Melcon Services Limited1995
- RDC Groundworks & Construction Ltd2019
- Supernet Communications Limited2019
All civil engineering contractors in Newmarket · All trades in Newmarket · Civil engineering across the UK
Frequently asked questions
When are Carolan Utilities Ltd's accounts due?
Carolan Utilities Ltd's next accounts are due at Companies House by 30 May 2027 (in 229 days), covering the period to 30 August 2026.
When is Carolan Utilities Ltd's CT600 due?
The CT600 for the period to 30 August 2026 is due at HMRC by 30 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 May 2027.
Is Carolan Utilities Ltd still trading?
Carolan Utilities 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 Carolan Utilities Ltd do?
Carolan Utilities Ltd is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is Carolan Utilities Ltd?
Carolan Utilities Ltd was incorporated on 11 August 2017, 9 years ago.
What is the penalty if Carolan Utilities 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 Carolan Utilities 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.