- Companies
- Civil engineering
- Kilmarnock
- Coltart Contracts Limited
Coltart Contracts Limited
- Company number
- SC081128
- Incorporated
- 9 Dec 198243 years trading
- Registered office
- Tourhill Industrial Estate, Kilmaurs, Kilmarnock, KA3 2TX
- Nature of business
- Construction of other civil engineering projects n.e.c.; Landscape service activities
Coltart Contracts Limited is a 43-year-old private limited company registered in Kilmarnock, company number SC081128, one of 50 civil engineering contractors in Kilmarnock. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £21K (+9%) on the year before, to £261K.
- Current assets of £289K against £93K owed within a year: 3.1 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 2 years, 2024 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £261K | £187K | £289K | £93K | 0 |
| 31 Dec 2024 | £239K | £197K | £310K | £108K | 0 |
Where Coltart Contracts Limited is registered
The registered office is in Kilmarnock (KA3), in the East Ayrshire local authority area, Scotland. Show KA3 2TX on a map.
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What happens if Coltart Contracts 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- SC081128
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 December 1982 (43 years ago)
- Registered office
- Tourhill Industrial Estate, Kilmaurs, Kilmarnock, KA3 2TX
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Landscape service activities (SIC 81300) - Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 31 August 2026
- Charges (mortgages)
- 0 outstanding of 3 registered
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 Kilmarnock
Other active civil engineering contractors registered in Kilmarnock.
- Current Works Consultancy Limited2020
- Delta Contracts Ltd2019
- Dy Civils Limited2022
- Fairway Utilities Ltd2024
- G B Resources Limited2018
- GCS Precision Projects Ltd2024
- Hydro Flow Drainage and Civils Limited2024
- I.H. Borland (Contractors) Limited1996
All civil engineering contractors in Kilmarnock · All trades in Kilmarnock · Civil engineering across the UK
Frequently asked questions
When are Coltart Contracts Limited's accounts due?
Coltart Contracts Limited's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Coltart Contracts Limited's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Coltart Contracts Limited still trading?
Coltart Contracts 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 Coltart Contracts Limited do?
Coltart Contracts Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Landscape service activities (SIC 81300).
How old is Coltart Contracts Limited?
Coltart Contracts Limited was incorporated on 9 December 1982, 43 years ago.
What is the penalty if Coltart Contracts 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 Coltart Contracts 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.