- Company number
- 11791390
- Incorporated
- 28 Jan 20197 years trading
- Registered office
- Bramingham Business & Conference Centre, Enterprise Way, Luton, Bedfordshire, LU3 4BU
- Nature of business
- Construction of domestic buildings
M J Reilly & Sons Ltd is a 7-year-old private limited company registered in Luton, company number 11791390, one of 708 building contractors in Luton. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £3,277 on the year before, to £3,378.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £22K against £18K owed within a year: 1.2 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £3,378 | £22K | £18K | 2 | |
| 31 Jan 2024 | £101 | £9,248 | £9,147 | 2 | |
| 31 Jan 2023 | £18K | £27K | £9,438 | 2 | |
| 31 Jan 2022 | £11K | £18K | £6,651 | 2 | |
| 31 Jan 2021 | £31K | £39K | £7,446 | 1 | |
| 31 Jan 2020 | £19K | £24K | 2 |
Where M J Reilly & Sons Ltd is registered
The registered office is in Luton (LU3), in the Luton local authority area, East of England. Show LU3 4BU on a map.
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Also registered at this address
22 other companies use the same registered office as M J Reilly & Sons Ltd.
- A D H Developments LimitedProperty developers
- Ampthill Drylining LtdFinishing trades
- Belglen Services LimitedPlasterers
- Berko Psi LtdPlasterers
- Billington & Son Contractors LimitedCivil engineering
- D W L Plastering LtdFloor and wall tilers
- Evolution Drylining LimitedPlasterers
- F S E Electrical LimitedElectricians
- Hayton Services LtdFinishing trades
- J T Automotives LimitedMechanics and garages
- Just Clean MK LtdCleaning companies
- KM Groundworks LimitedSpecialist contractors
- M J Morrison LimitedPlasterers
- Mackcon Pipeline Services LtdCivil engineering
- McCaffrey Contractors LtdBuilders
- MMK Plastering LtdPlasterers
- Neatheat Plumbing & Heating LtdPlumbers and heating engineers
- Nuhomeuk LtdSpecialist contractors
- Oaktree Drylining LimitedFloor and wall tilers
- Ocean Project Developments LtdProperty developers
- Sunset Productions LtdElectricians
- XRP Developments LtdFinishing trades
What happens if M J Reilly & Sons 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 11791390
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 January 2019 (7 years ago)
- Registered office
- Bramingham Business & Conference Centre, Enterprise Way, Luton, Bedfordshire, LU3 4BU
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 27 January 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Luton
Other active building contractors registered in Luton.
- M&C&B Solutions Ltd2025
- M&N Groundworks Ltd2022
- M&O&N Services Ltd2021
- Mabd Construction Ltd2026
- Machy2005 Construct Ltd2022
- Mahmutaj Group Ltd2026
- Maiden Tower Ltd2026
- Malhi Building Construction Limited2020
All building contractors in Luton · All trades in Luton · Builders across the UK
Frequently asked questions
When are M J Reilly & Sons Ltd's accounts due?
M J Reilly & Sons Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is M J Reilly & Sons Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is M J Reilly & Sons Ltd still trading?
M J Reilly & Sons 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 M J Reilly & Sons Ltd do?
M J Reilly & Sons Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is M J Reilly & Sons Ltd?
M J Reilly & Sons Ltd was incorporated on 28 January 2019, 7 years ago.
What is the penalty if M J Reilly & Sons 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 M J Reilly & Sons 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.