- Companies
- Civil engineering
- Isle of Lewis
- Calmax Civils Limited
Calmax Civils Limited
- Company number
- SC317150
- Incorporated
- 23 Feb 200719 years trading
- Registered office
- 1 Blackwater, Newmarket, Laxdale, Isle of Lewis, HS2 0EE
- Nature of business
- Construction of other civil engineering projects n.e.c.
Calmax Civils Limited is a 19-year-old private limited company registered in Isle of Lewis, company number SC317150, one of 5 civil engineering contractors in Isle of Lewis. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £23K (-76.3%) on the year before, to £7,008.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £13K against £18K owed within a year: 0.7 times cover.
- 17 employees on average, down from 18 the year before.
- 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 Oct 2025 | £7,008 | £13K | £13K | £18K | 17 |
| 31 Oct 2024 | £30K | £6,556 | £43K | £29K | 18 |
| 31 Oct 2023 | £29K | £12K | £48K | £39K | 19 |
| 31 Oct 2022 | £39K | £24K | £60K | £46K | 20 |
| 31 Oct 2021 | £45K | £18K | £54K | £41K | 24 |
| 31 Oct 2020 | £58K | £18K | £54K | £36K | 25 |
| 30 Jun 2019 | £73K | £54K | £76K | £57K | 32 |
| 30 Jun 2018 | £77K | £231 | £48K | £39K | 30 |
| 30 Jun 2017 | £93K | £8,253 | £56K | £49K | 30 |
| 30 Jun 2016 | £93K | £21K | £43K | £57K |
Where Calmax Civils Limited is registered
The registered office is in Isle of Lewis (HS2), in the Na h-Eileanan Siar local authority area, Scotland. Show HS2 0EE on a map.
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What happens if Calmax Civils 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- SC317150
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 February 2007 (19 years ago)
- Registered office
- 1 Blackwater, Newmarket, Laxdale, Isle of Lewis, HS2 0EE
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 24 February 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 Isle of Lewis
Other active civil engineering contractors registered in Isle of Lewis.
- D J Macaulay Construction Limited2003
- Eishken Renewables Limited2026
- Kinloch Construction Limited2011
- Maciver Consultancy Services Limited2007
All civil engineering contractors in Isle of Lewis · All trades in Isle of Lewis · Civil engineering across the UK
Frequently asked questions
When are Calmax Civils Limited's accounts due?
Calmax Civils Limited's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Calmax Civils Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Calmax Civils Limited still trading?
Calmax Civils 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 Calmax Civils Limited do?
Calmax Civils Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Calmax Civils Limited?
Calmax Civils Limited was incorporated on 23 February 2007, 19 years ago.
What is the penalty if Calmax Civils 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 Calmax Civils 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.