- Company number
- 09872948
- Incorporated
- 16 Nov 201510 years trading
- Registered office
- Suite 5A ,30 Dean Street, Dean Street, Bangor, LL57 1UR
- Nature of business
- Construction of domestic buildings
RR Mon Construction Ltd is a 10-year-old private limited company registered in Bangor, company number 09872948, one of 75 building contractors in Bangor. Its next accounts are due at Companies House on 31 October 2026, and its first CT600 is due at HMRC on 31 October 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 down £23K (-40.6%) on the year before, to £33K.
- Net assets rose in 5 of 7 year-on-year comparisons on record.
- Current assets of £295K against £281K owed within a year: 1.1 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 9 years, 2016 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2024 | £33K | £295K | £281K | 3 | |
| 31 Oct 2023 | £56K | £220K | £186K | 3 | |
| 31 Oct 2022 | £100K | £44K | 2 | ||
| 31 Oct 2021 | £80K | £176K | £107K | 1 | |
| 31 Oct 2020 | £59K | £306K | £259K | 1 | |
| 31 Oct 2019 | £29K | £200K | £186K | 1 | |
| 31 Oct 2018 | £9,655 | £183K | £189K | ||
| 31 Oct 2017 | £16 | £119K | £137K | ||
| 31 Oct 2016 | £85K | £103K |
Where RR Mon Construction Ltd is registered
The registered office is in Bangor (LL57), in the Gwynedd local authority area, Wales. Show LL57 1UR on a map.
Other trade companies in LL57
- Purple Plumbers LimitedPlumbers and heating engineers
- E.R.A Humphreys LimitedCivil engineering
- Morris&Owens LimitedPlasterers
- North Coast Carpentry and Construction LimitedJoiners and carpenters
- P M Williams & Son LtdBuilders
- K Gorilla Cars LtdMotor traders
- Gwynedd Scaffolding LimitedScaffolders
- J&G Building and Assembling LtdBuilders
Also registered at this address
2 other companies use the same registered office as RR Mon Construction Ltd.
- Hudson Rose Developments LimitedProperty developers
- Voss Decorators LimitedPainters and decorators
What happens if RR Mon 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 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
- 09872948
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 November 2015 (10 years ago)
- Registered office
- Suite 5A ,30 Dean Street, Dean Street, Bangor, LL57 1UR
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2024
- Last confirmation statement
- 15 November 2025
- Charges (mortgages)
- 0 outstanding of 3 registered
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 Bangor
Other active building contractors registered in Bangor.
- Saba Investments Limited1990
- Shorefront Developments Ltd2016
- South Belfast Developments Limited2014
- Sutton Court Road Limited2017
- Teal Farms (NI) Ltd2025
- TG Southall Limited2021
- Tubs 2 Pools Ltd2024
- Tymor Building Contractors Limited2002
All building contractors in Bangor · All trades in Bangor · Builders across the UK
Frequently asked questions
When are RR Mon Construction Ltd's accounts due?
RR Mon Construction Ltd's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is RR Mon 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 31 October 2025, due by 31 October 2026, and one for the period to 31 January 2026, due by 31 January 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is RR Mon Construction Ltd still trading?
RR Mon 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 RR Mon Construction Ltd do?
RR Mon Construction Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is RR Mon Construction Ltd?
RR Mon Construction Ltd was incorporated on 16 November 2015, 10 years ago.
What is the penalty if RR Mon 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 RR Mon 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.