- Companies
- Civil engineering
- Doncaster
- Colwill Contracting Limited
Colwill Contracting Limited
- Company number
- 04261578
- Incorporated
- 30 Jul 200125 years trading
- Registered office
- 35 Thorne Road, Doncaster, DN1 2HD
- Nature of business
- Construction of other civil engineering projects n.e.c.
Colwill Contracting Limited is a 25-year-old private limited company registered in Doncaster, company number 04261578, one of 170 civil engineering contractors in Doncaster. 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 £267K (+49.8%) on the year before, to £804K.
- Net assets rose in 9 of 9 year-on-year comparisons on record.
- Current assets of £14K against £208K owed within a year: 0.1 times cover.
- 6 employees on average, up from 5 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 Jul 2025 | £804K | £100 | £14K | £208K | 6 |
| 31 Jul 2024 | £537K | £237K | £246K | £195K | 5 |
| 31 Jul 2023 | £400K | £42K | £73K | £124K | 4 |
| 31 Jul 2022 | £318K | £22K | £48K | £114K | 4 |
| 31 Jul 2021 | £295K | £28K | £84K | £134K | 2 |
| 31 Jul 2020 | £264K | £63K | £75K | £124K | 2 |
| 31 Jul 2019 | £226K | £214K | £217K | £74K | 2 |
| 31 Jul 2018 | £91K | £15K | £36K | £16K | |
| 31 Jul 2017 | £77K | £7,002 | £30K | £17K | |
| 31 Jul 2016 | £45K | £51K | £69K | £92K |
Public contracts won
Colwill Contracting Limited has 3 public sector contract awards on record; the ones with their own published value total £167K, from 2017 to 2018. Source: Contracts Finder and Find a Tender award notices. For 1 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Defra Network eTendering Portal2 awards
- Doncaster East Internal Drainage Board1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Defra Network eTendering Portal | Construction of tilting weirs at Hatfield SAC part of Humberhead Peatlands NNR | £154K | 26 Mar 2018 |
| Doncaster East Internal Drainage Board | Provision of Watercourse Maintenance Services to Doncaster East Internal Drainage Board | Ceiling, not shown | 20 Apr 2017 |
| Defra Network eTendering Portal | Repair section of road through Thorne Moors Nature Reserve | £13K | 25 Jan 2017 |
Where Colwill Contracting Limited is registered
The registered office is in Doncaster (DN1), in the Doncaster local authority area, Yorkshire and The Humber. Show DN1 2HD on a map.
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Also registered at this address
17 other companies use the same registered office as Colwill Contracting Limited.
- A D R Homes LimitedBuilders
- Analogue Electrics LimitedElectricians
- At Dry Lining Systems LtdSpecialist contractors
- Brackenfield Developments LtdBuilders
- D.D-R. Joinery LimitedJoiners and carpenters
- Ecovolt Solar Installations LtdElectricians
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- Homenumber Property Management LimitedProperty developers
- Hycross (Garage Services) LtdMechanics and garages
- Jakto Excavations LtdGroundworks and demolition
- Kingswood Restoration LimitedPainters and decorators
- Mason Electrical Services LimitedElectricians
- Oaklands Property Solutions LtdProperty developers
- Prima Mechanical Services LimitedCivil engineering
- Select Electrical (GB) LimitedElectricians
- Skidmore Electrical (UK) LtdElectricians
- Steve Hobson Building & Joinery LtdBuilders
What happens if Colwill Contracting 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
- 04261578
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 July 2001 (25 years ago)
- Registered office
- 35 Thorne Road, Doncaster, DN1 2HD
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 19 June 2026
- Charges (mortgages)
- 1 outstanding of 1 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 Doncaster
Other active civil engineering contractors registered in Doncaster.
- Conor Communications Ltd2025
- Crompton Rail Ltd2024
- D B Drainage Ltd2006
- D. Jackson Slurry Seal Ltd2023
- Dae Traffic Ltd2022
- Danum Civil Engineering Limited2016
- Davies Design & Build Ltd2018
- Dawson & Dearden Construction Limited2011
All civil engineering contractors in Doncaster · All trades in Doncaster · Civil engineering across the UK
Frequently asked questions
When are Colwill Contracting Limited's accounts due?
Colwill Contracting Limited's next accounts are due at Companies House by 30 April 2027 (in 200 days), covering the period to 31 July 2026.
When is Colwill Contracting 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 Colwill Contracting Limited still trading?
Colwill Contracting 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 Colwill Contracting Limited do?
Colwill Contracting Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Colwill Contracting Limited?
Colwill Contracting Limited was incorporated on 30 July 2001, 25 years ago.
Has Colwill Contracting Limited won public sector contracts?
Yes. Colwill Contracting Limited has 3 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £167K), most recently from Defra Network eTendering Portal.
What is the penalty if Colwill Contracting 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 Colwill Contracting 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.