- Companies
- Property developers
- Ammanford
- Mainwarings Groundwork & Construction Limited
Mainwarings Groundwork & Construction Limited
- Company number
- 13396553
- Incorporated
- 14 May 20215 years trading
- Registered office
- Bryn Cathan Heol Waun Ddwfn, Betws, Ammanford, SA18 2PA
- Nature of business
- Development of building projects
Mainwarings Groundwork & Construction Limited is a 5-year-old private limited company registered in Ammanford, company number 13396553, one of 27 property development companies in Ammanford. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £38K (+10.4%) on the year before, to £398K.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £465K against £329K owed within a year: 1.4 times cover.
- 2 employees on average, down from 4 the year before.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £398K | £33K | £465K | £329K | 2 |
| 31 May 2024 | £360K | £105K | £485K | £725K | 4 |
| 31 May 2023 | £297K | £281K | £475K | 5 | |
| 31 May 2022 | £122K | £111K | £254K | 5 |
Where Mainwarings Groundwork & Construction Limited is registered
The registered office is in Ammanford (SA18), in the Carmarthenshire local authority area, Wales. Show SA18 2PA on a map.
Other trade companies in SA18
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- Dyfed Engineering LtdElectricians
- Serval Mechanical & Fabrication LtdMechanics and garages
- Timber and Trade Solutions LtdBuilders
- West Wales Cleaning Group LtdCleaning companies
- Carpet Confession LtdCleaning companies
- Elite Painting Solutions LtdPainters and decorators
- Dafku Construction LtdCivil engineering
Also registered at this address
1 other company uses the same registered office as Mainwarings Groundwork & Construction Limited.
- Mainwarings Developments LimitedProperty developers
What happens if Mainwarings Groundwork & Construction 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 13396553
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 May 2021 (5 years ago)
- Registered office
- Bryn Cathan Heol Waun Ddwfn, Betws, Ammanford, SA18 2PA
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 13 May 2026
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 Ammanford
Other active property development companies registered in Ammanford.
- Meester Green Ltd2026
- Meester Properties UK Ltd2026
- Price Carpentry & Construction Ltd2017
- R N M Barnes Limited2022
- Rapid IT (Outsourcing Services) Ltd2019
- Rowan Evans Building Contractors Ltd2020
- Shire Homes (Carms) Ltd2017
- Steada Limited2019
All property development companies in Ammanford · All trades in Ammanford · Property developers across the UK
Frequently asked questions
When are Mainwarings Groundwork & Construction Limited's accounts due?
Mainwarings Groundwork & Construction Limited's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Mainwarings Groundwork & Construction Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Mainwarings Groundwork & Construction Limited still trading?
Mainwarings Groundwork & Construction 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 Mainwarings Groundwork & Construction Limited do?
Mainwarings Groundwork & Construction Limited is registered under Development of building projects (SIC 41100).
How old is Mainwarings Groundwork & Construction Limited?
Mainwarings Groundwork & Construction Limited was incorporated on 14 May 2021, 5 years ago.
What is the penalty if Mainwarings Groundwork & Construction 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 Mainwarings Groundwork & Construction 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.