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- Abergavenny
- Mainunit Limited
Company profile · Property developers
Mainunit Limited
Mainunit Limited is a 29-year-old private limited company registered in Abergavenny, company number 03273064, one of 30 property development companies in Abergavenny. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 30 June 2025, as filed at Companies House.
Mainunit Limited over the years
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 £83K (+1.1%) on the year before, to £7.6M.
- Net assets rose in 7 of 7 year-on-year comparisons on record.
- Current assets of £5M against £3M owed within a year: 1.7 times cover.
- 2 employees on average, up from 0 the year before.
- Balance sheets on record for 8 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £7.6M | £183K | £5M | £3M | 2 |
| 30 Jun 2024 | £7.5M | £205K | £3.4M | £1.3M | 0 |
| 30 Jun 2023 | £7.1M | £209K | £2.9M | £1.2M | 0 |
| 30 Jun 2022 | £7M | £359K | £2.7M | £1.2M | 0 |
| 30 Jun 2021 | £6.7M | £521K | £2.4M | £1.2M | 0 |
| 30 Jun 2020 | £6.5M | £410K | £2.1M | £1.2M | 0 |
| 30 Jun 2019 | £6.4M | £436K | £1.5M | £1.6M | |
| 31 Dec 2017 | £6.3M | £60K | £1M | £1.6M |
Where Mainunit Limited is registered
The registered office is in Abergavenny (NP7), in the Monmouthshire local authority area, Wales. Show NP7 5AA on a map.
Other trade companies in NP7
- Abergavenny Car Wash LimitedMechanics and garages
- Prysm Group LimitedBuilders
- Lanes Recovery (Gloucester) LimitedMechanics and garages
- The Reliable Cleaning Company LtdCleaning companies
- Danter Properties LtdProperty developers
- Aseado Cleaning LtdCleaning companies
- J W Property and Garden Maintenance LtdProperty developers
- Pro Build Concepts LimitedProperty developers
Also registered at this address
2 other companies use the same registered office as Mainunit Limited.
- Cambrensis Civil Engineering LimitedCivil engineering
- United Joinery LimitedCivil engineering
What happens if Mainunit 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 03273064
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 November 1996 (29 years ago)
- Registered office
- 21 Nevill Street, Abergavenny, Monmouthshire, NP7 5AA
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 4 November 2025
- Charges (mortgages)
- 0 outstanding of 22 registered
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Abergavenny
Other active property development companies registered in Abergavenny.
- Matra Enterprises Limited2016
- Monahawk Developments Limited2012
- Nokomis Contracts Ltd2024
- Percivals Nurseries Limited1955
- Powell Build Ltd2025
- Prioredge Limited1990
- Pro Build Concepts Limited2026
- Resto Build Ltd2025
All property development companies in Abergavenny · All trades in Abergavenny · Property developers across the UK
Frequently asked questions
When are Mainunit Limited's accounts due?
Mainunit Limited's next accounts are due at Companies House by 31 March 2027 (in 170 days), covering the period to 30 June 2026.
When is Mainunit Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Mainunit Limited still trading?
Mainunit 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 Mainunit Limited do?
Mainunit Limited is registered under Development of building projects (SIC 41100).
How old is Mainunit Limited?
Mainunit Limited was incorporated on 4 November 1996, 29 years ago.
What is the penalty if Mainunit 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 Mainunit 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.