- Companies
- Finishing trades
- Oldham
- Castleknock Construction Ltd
Castleknock Construction Ltd
- Company number
- 08287423
- Incorporated
- 9 Nov 201213 years trading
- Registered office
- C/O Edwards Veeder (UK) Limited Ground Floor, 4 Broadgate, Broadway Business Park, Chadderton, Oldham, OL9 9XA
- Nature of business
- Other building completion and finishing
Castleknock Construction Ltd is a 13-year-old private limited company registered in Oldham, company number 08287423, one of 97 building finishing companies in Oldham. Its next accounts are due at Companies House on 29 November 2026, and its first CT600 is due at HMRC on 30 November 2026.
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 £33K (+7.5%) on the year before, to £475K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £606K against £155K owed within a year: 3.9 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2024 | £475K | £537K | £606K | £155K | 3 |
| 30 Nov 2023 | £442K | £438K | £503K | £87K | 3 |
| 30 Nov 2022 | £307K | £283K | £315K | £43K | 3 |
| 30 Nov 2021 | £249K | £275K | £32K | 3 | |
| 30 Nov 2020 | £205K | £322K | £125K | 4 | |
| 29 Nov 2020 | £205K | £322K | £125K | 4 | |
| 29 Nov 2019 | £191K | £212K | £32K | 3 | |
| 29 Nov 2018 | £118K | £116K | £13K | ||
| 30 Nov 2017 | £133K | £142K | £12K | ||
| 30 Nov 2016 | £128K | £59K | £136K | £12K |
Where Castleknock Construction Ltd is registered
The registered office is in Oldham (OL9), in the Oldham local authority area, North West. Show OL9 9XA on a map.
Other trade companies in OL9
- Grey Homes LtdFinishing trades
- Layfield Landscapes LimitedLandscapers and gardeners
- Rahma Builds LtdProperty developers
- Chadderton Mobile Tyre Services LtdMachinery repair and installation
- Carpet Guardian LtdCleaning companies
- Hollinwood Mobile Tyres LtdMechanics and garages
- Aslam Building Solutions LtdBuilders
- Auto Electronics Online LtdRepair services
Also registered at this address
13 other companies use the same registered office as Castleknock Construction Ltd.
- Buildwise Cheshire LimitedFinishing trades
- CB Fire Installation LtdElectricians
- D. & J. Builders (North West) LtdFinishing trades
- Davro LimitedMotor traders
- DC Electrical (Northwest) LimitedElectricians
- Greenview Projects LtdElectricians
- Jda Homes LimitedProperty developers
- K & L Barrow (Home Improvements) LtdJoiners and carpenters
- M & S (North West) LimitedSpecialist contractors
- Pile Group LtdCivil engineering
- Price Homes LimitedProperty developers
- Sonos Developments LtdCivil engineering
- Technical Infrastructure Solutions LtdProperty developers
What happens if Castleknock Construction Ltd 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 29 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Nov 2026 to 29 Dec 2026 | £150 |
| 1 to 3 months late | 30 Dec 2026 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 29 May 2027 | £750 |
| More than 6 months late | From 30 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 08287423
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 November 2012 (13 years ago)
- Registered office
- C/O Edwards Veeder (UK) Limited Ground Floor, 4 Broadgate, Broadway Business Park, Chadderton, Oldham, OL9 9XA
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 29 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2024
- Last confirmation statement
- 9 November 2025
Filing notes for building finishing companies
Finishing trade companies cover a wide range of work. Most are micro-entities with simple accounts and a straightforward CT600.
Similar companies in Oldham
Other active building finishing companies registered in Oldham.
- Cladding Coatings Ltd2009
- CNM Restoration Limited2009
- Connor Limited1991
- CRDB Scaffolds Ltd2025
- Croftwood Developments Limited2012
- Crystal Shine Pro Ltd2025
- D Lowe Decorators Ltd2020
- D. & J. Builders (North West) Ltd2005
All building finishing companies in Oldham · All trades in Oldham · Finishing trades across the UK
Frequently asked questions
When are Castleknock Construction Ltd's accounts due?
Castleknock Construction Ltd's next accounts are due at Companies House by 29 November 2026 (in 47 days), covering the period to 28 February 2026.
When is Castleknock Construction Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 30 November 2025, due by 30 November 2026, and one for the period to 28 February 2026, due by 28 February 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Castleknock Construction Ltd still trading?
Castleknock Construction Ltd 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 Castleknock Construction Ltd do?
Castleknock Construction Ltd is registered under Other building completion and finishing (SIC 43390).
How old is Castleknock Construction Ltd?
Castleknock Construction Ltd was incorporated on 9 November 2012, 13 years ago.
What is the penalty if Castleknock Construction Ltd 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 Castleknock Construction Ltd 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.