- Companies
- Civil engineering
- Chatham
- S P Mills Ltd
S P Mills Ltd
- Company number
- 10219862
- Incorporated
- 8 Jun 201610 years trading
- Registered office
- 24 Downsview, Chatham, Kent, ME5 0AP
- Nature of business
- Construction of roads and motorways
S P Mills Ltd is a 10-year-old private limited company registered in Chatham, company number 10219862, one of 77 civil engineering contractors in Chatham. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £173K (+20.9%) on the year before, to £1M.
- Net assets rose in 7 of 8 year-on-year comparisons on record.
- Current assets of £1.1M against £136K owed within a year: 8.4 times cover.
- 1 employee 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 May 2025 | £1M | £931K | £1.1M | £136K | 1 |
| 31 May 2024 | £828K | £750K | £967K | £139K | 1 |
| 31 May 2023 | £539K | £452K | £635K | £97K | 1 |
| 31 May 2022 | £266K | £223K | £42K | 1 | |
| 31 May 2021 | £149K | £111K | £29K | 1 | |
| 31 May 2020 | £80K | £19K | £25K | 1 | |
| 31 May 2019 | £1 | £1 | £0 | ||
| 31 May 2018 | £5,290 | £16K | £11K | ||
| 31 May 2017 | £1,601 | £11K | £9,148 | ||
| 7 Jun 2016 | £0 | £0 |
Where S P Mills Ltd is registered
The registered office is in Chatham (ME5), in the Medway local authority area, South East. Show ME5 0AP on a map.
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- JRB Developers LtdProperty developers
Shared registered office
168 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 S P Mills 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 10219862
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 June 2016 (10 years ago)
- Registered office
- 24 Downsview, Chatham, Kent, ME5 0AP
- Nature of business
- Construction of roads and motorways (SIC 42110)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 7 June 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 Chatham
Other active civil engineering contractors registered in Chatham.
- Sergio Cardoso Ltd2026
- Sidolart Rails and Construction Ltd2023
- Smart Lay Surfacing Ltd2026
- Strategy and Projects Consultants Ltd2019
- Stratford Rail (Se) Ltd2023
- Sword Civils Limited2024
- Teichert & Sons Ltd2021
- Trinity Connex Ltd2022
All civil engineering contractors in Chatham · All trades in Chatham · Civil engineering across the UK
Frequently asked questions
When are S P Mills Ltd's accounts due?
S P Mills Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is S P Mills Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is S P Mills Ltd still trading?
S P Mills 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 S P Mills Ltd do?
S P Mills Ltd is registered under Construction of roads and motorways (SIC 42110).
How old is S P Mills Ltd?
S P Mills Ltd was incorporated on 8 June 2016, 10 years ago.
What is the penalty if S P Mills 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 S P Mills 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.