- Companies
- Finishing trades
- Londonderry
- G Mullan & Sons Ltd
G Mullan & Sons Ltd
- Company number
- NI646222
- Incorporated
- 6 Jun 20179 years trading
- Registered office
- 318B Foreglen Road, Dungiven, Londonderry, BT47 4PJ
- Nature of business
- Other building completion and finishing
G Mullan & Sons Ltd is a 9-year-old private limited company registered in Londonderry, company number NI646222, one of 23 building finishing companies in Londonderry. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for G Mullan & Sons LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £49K (+6.7%) on the year before, to £782K.
- Net assets rose in 7 of 7 year-on-year comparisons on record.
- Current assets of £85K against £252K owed within a year: 0.3 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £782K | £72K | £85K | £252K | 0 |
| 30 Sep 2024 | £733K | £94K | £104K | £282K | 1 |
| 30 Sep 2023 | £659K | £73K | £82K | £288K | 1 |
| 30 Sep 2022 | £516K | £65K | £72K | £220K | 1 |
| 30 Sep 2021 | £288K | £21K | £59K | £242K | 0 |
| 30 Sep 2020 | £190K | £95K | £102K | £220K | 0 |
| 30 Sep 2019 | £53K | £25K | £62K | £207K | |
| 30 Sep 2018 | £26K | £14K | £16K | £127K |
Where G Mullan & Sons Ltd is registered
The registered office is in Londonderry (BT47), in the Causeway Coast and Glens local authority area, Northern Ireland. Show BT47 4PJ on a map.
Other trade companies in BT47
- RNK Contracts LimitedGroundworks and demolition
- Den Electrical LtdElectricians
- BDK Consulting LimitedProperty developers
- Oakline Engineering LtdInstallers
- Killew Property Services LimitedFacilities management
- PH Autobody LimitedMechanics and garages
- C Doherty Autos LtdMechanics and garages
- CPMH LtdBuilders
Also registered at this address
1 other company uses the same registered office as G Mullan & Sons Ltd.
- G Mullan Contracts LtdSpecialist contractors
What happens if G Mullan & 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- NI646222
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 June 2017 (9 years ago)
- Registered office
- 318B Foreglen Road, Dungiven, Londonderry, BT47 4PJ
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 15 September 2026
- Charges (mortgages)
- 8 outstanding of 8 registered
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 Londonderry
Other active building finishing companies registered in Londonderry.
- Glen-Conn Construction Ltd2020
- Imac Construction Services Limited2005
- KLLC Contracts Limited2011
- MCM Drylining Limited2024
- Mulderg Interior Linings Limited2014
- Northwest Joinery Ltd2004
- NPF Group Ltd2020
- Rendering Services Ireland Ltd2024
All building finishing companies in Londonderry · All trades in Londonderry · Finishing trades across the UK
Frequently asked questions
When are G Mullan & Sons Ltd's accounts due?
G Mullan & Sons Ltd's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is G Mullan & Sons Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is G Mullan & Sons Ltd still trading?
G Mullan & 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 G Mullan & Sons Ltd do?
G Mullan & Sons Ltd is registered under Other building completion and finishing (SIC 43390).
How old is G Mullan & Sons Ltd?
G Mullan & Sons Ltd was incorporated on 6 June 2017, 9 years ago.
What is the penalty if G Mullan & 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 G Mullan & 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.