- Companies
- Civil engineering
- Bolton
- Kilmartin (North West) Limited
Kilmartin (North West) Limited
- Company number
- 05401344
- Incorporated
- 22 Mar 200521 years trading
- Registered office
- Unit N/1/18 Nortex Mill 105 Chorley Old Road, Bolton, Lancashire, BL1 3AG
- Nature of business
- Construction of other civil engineering projects n.e.c.
Kilmartin (North West) Limited is a 21-year-old private limited company registered in Bolton, company number 05401344, one of 89 civil engineering contractors in Bolton. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £374K (+45.1%) on the year before, to £1.2M.
- Net assets rose in 9 of 9 year-on-year comparisons on record.
- Current assets of £900K against £183K owed within a year: 4.9 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 Jul 2025 | £1.2M | £900K | £183K | 0 | |
| 31 Jul 2024 | £830K | £754K | £153K | 1 | |
| 31 Jul 2023 | £731K | £624K | £160K | 1 | |
| 31 Jul 2022 | £479K | £504K | £222K | 1 | |
| 31 Jul 2021 | £376K | £266K | £45K | 2 | |
| 31 Jan 2020 | £174K | £191K | £75K | 1 | |
| 31 Jan 2019 | £75K | £62K | £38K | ||
| 31 Jan 2018 | £73K | £40K | £32K | ||
| 31 Jan 2017 | £59K | £139K | £134K | ||
| 31 Jan 2016 | £51K | £38K | £172K | £179K |
Where Kilmartin (North West) Limited is registered
The registered office is in Bolton (BL1), in the Bolton local authority area, North West. Show BL1 3AG on a map.
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What happens if Kilmartin (North West) 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 05401344
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 March 2005 (21 years ago)
- Registered office
- Unit N/1/18 Nortex Mill 105 Chorley Old Road, Bolton, Lancashire, BL1 3AG
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 19 April 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 Bolton
Other active civil engineering contractors registered in Bolton.
- Kilmartin Limited2003
- L. Smith and Sons Engineering Contractors Ltd2026
- Lambs(UK) Civils Limited2017
- M Wild Utilities Limited2016
- Mab Bolton Limited2011
- Manchester Road Surfacing Limited1998
- MCX Construction Ltd2026
- Mega Driveways Limited2026
All civil engineering contractors in Bolton · All trades in Bolton · Civil engineering across the UK
Frequently asked questions
When are Kilmartin (North West) Limited's accounts due?
Kilmartin (North West) Limited's next accounts are due at Companies House by 30 April 2027 (in 198 days), covering the period to 31 July 2026.
When is Kilmartin (North West) Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Kilmartin (North West) Limited still trading?
Kilmartin (North West) 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 Kilmartin (North West) Limited do?
Kilmartin (North West) Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Kilmartin (North West) Limited?
Kilmartin (North West) Limited was incorporated on 22 March 2005, 21 years ago.
What is the penalty if Kilmartin (North West) 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 Kilmartin (North West) 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.