- Companies
- Plumbers and heating engineers
- Kidlington
- Darnells Limited
Darnells Limited
- Company number
- 02633775
- Incorporated
- 31 Jul 199135 years trading
- Registered office
- 30 Bankside Court, Stationfields, Kidlington, Oxford, OX5 1JE
- Nature of business
- Plumbing, heat and air-conditioning installation
Darnells Limited is a 35-year-old private limited company registered in Kidlington, company number 02633775, one of 16 plumbing and heating companies in Kidlington. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £96K (+30.4%) on the year before, to £412K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £1M against £619K owed within a year: 1.6 times cover.
- 15 employees on average, down from 16 the year before.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £412K | £692K | £1M | £619K | 15 |
| 31 Mar 2025 | £316K | £555K | £940K | £661K | 16 |
| 31 Mar 2024 | £619K | £791K | £1.2M | £695K | 17 |
| 31 Mar 2023 | £550K | £603K | £1.1M | £602K | 14 |
| 31 Mar 2022 | £452K | £533K | £959K | £538K | 11 |
| 31 Mar 2021 | £586K | £529K | £938K | £366K | 10 |
| 31 Mar 2020 | £477K | £448K | £945K | £444K | 0 |
| 31 Mar 2019 | £308K | £536K | £1M | £564K | 10 |
| 31 Mar 2018 | £252K | £417K | £908K | £438K | 10 |
| 31 Mar 2017 | £118K | £232K | £870K | £473K |
Public contracts won
Darnells Limited has 9 public sector contract awards on record; the ones with their own published value total £878K, from 2015 to 2026. Source: Contracts Finder and Find a Tender award notices. 8 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Oxfordshire County Council8 awards
- Buckinghamshire County Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Oxfordshire County Council | Hot and cold water pipework replacement works at Sunningwell School | £64K | 10 Jul 2026 |
| Oxfordshire County Council | Installation of Air Source Heat Pump at Berinsfield Library | £47K | 27 Apr 2026 |
| Oxfordshire County Council | Installation of Air Source Heat Pump at Wantage Library | £129K | 10 Mar 2026 |
| Oxfordshire County Council | Abingdon Fire Station ASHP | £230K | 11 Aug 2025 |
| Oxfordshire County Council | Comper School Boiler Replacement | £67K | 12 Jun 2025 |
| Oxfordshire County Council | Valley Road School Boiler Replacement | £99K | 15 Sep 2024 |
| Oxfordshire County Council | St Blaise School Boiler Replacement Works | £73K | 20 Dec 2023 |
| Oxfordshire County Council | Caldecott School Boiler Replacement | £68K | 20 Dec 2023 |
| Buckinghamshire County Council | Elmhurst School - Boiler Replacement Works | £100K | 26 Oct 2015 |
Where Darnells Limited is registered
The registered office is in Kidlington (OX5), in the Cherwell local authority area, South East. Show OX5 1JE on a map.
Other trade companies in OX5
- Lally Fenestration LtdJoiners and carpenters
- Langford & Co Construction LtdProperty developers
- The Oxford Kitchen Fitter LtdJoiners and carpenters
- Michelin Cleaning Services LtdCleaning companies
- CPH Electrical Oxford LtdElectricians
- Oxford Brick & Stone LtdBuilders
- CPH Property Services Oxford LtdBuilders
- Cam Muldur Contracting LtdBuilders
Also registered at this address
14 other companies use the same registered office as Darnells Limited.
- A.K. Halsey Electrical LimitedElectricians
- Apservices Electrical LtdElectricians
- C J Twomey Engineering Ltd.Specialist contractors
- Capon Bros Electrical LtdElectricians
- Complete Glass and Glazing Oxford LtdGlaziers
- D J Walker Roofing LtdRoofers
- Ep8 LtdBuilders
- John Sheehan (Oxford) LimitedGroundworks and demolition
- M V Firmin Garden Landscaping LimitedLandscapers and gardeners
- Nigel Belcher Turf & Paving LimitedLandscapers and gardeners
- Parker Contract Cleaning LimitedCleaning companies
- Proceda LtdBuilders
- Sandbox Design and Build LtdSpecialist contractors
- Zilicium LimitedMotor traders
What happens if Darnells 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 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 02633775
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 31 July 1991 (35 years ago)
- Registered office
- 30 Bankside Court, Stationfields, Kidlington, Oxford, OX5 1JE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 31 January 2026
- Charges (mortgages)
- 0 outstanding of 4 registered
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Kidlington
Other active plumbing and heating companies registered in Kidlington.
- Gas Heating & Service Ltd2011
- Grayson Plumbing and Heating Ltd2022
- Just Gas Heating Limited2014
- Louie Paine Limited2006
- MHL Ltd2013
- PGL Ventilation Limited2017
- R Didcock Plumbing & Heating Ltd2023
- Radcliffe and Co Plumbing and Heating Ltd2026
All plumbing and heating companies in Kidlington · All trades in Kidlington · Plumbers and heating engineers across the UK
Frequently asked questions
When are Darnells Limited's accounts due?
Darnells Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Darnells Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Darnells Limited still trading?
Darnells 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 Darnells Limited do?
Darnells Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Darnells Limited?
Darnells Limited was incorporated on 31 July 1991, 35 years ago.
Has Darnells Limited won public sector contracts?
Yes. Darnells Limited has 9 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £878K), most recently from Oxfordshire County Council.
What is the penalty if Darnells 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 Darnells 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.