- Company number
- 09747058
- Incorporated
- 25 Aug 201511 years trading
- Registered office
- Little Tortworth Busbridge Road, Loose, Maidstone, Kent, ME15 0ES
- Nature of business
- Construction of domestic buildings
Allan Underdown Building Services Ltd is a 11-year-old private limited company registered in Maidstone, company number 09747058, one of 272 building contractors in Maidstone. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £64K (+103.7%) on the year before, to £126K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £173K against £60K owed within a year: 2.9 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £126K | £173K | £173K | £60K | 3 |
| 31 Aug 2024 | £62K | £82K | £82K | £37K | 3 |
| 31 Aug 2023 | £56K | £68K | £30K | 3 | |
| 31 Aug 2022 | £40K | £55K | £21K | 3 | |
| 31 Aug 2021 | £37K | £69K | £32K | 3 | |
| 31 Aug 2020 | £27K | £45K | £45K | £20K | 4 |
| 31 Aug 2019 | £44K | £57K | £62K | £24K | |
| 31 Aug 2018 | £33K | £48K | £56K | £32K | 4 |
| 31 Aug 2017 | £49K | £49K | £60K | £23K | 4 |
| 31 Aug 2016 | £63K | £58K | £89K | £43K |
Who runs and owns Allan Underdown Building Services Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| A*** U*** | Director | Aug 2015 |
| K*** U*** | Director | Aug 2015 |
People with significant control (2)
Where Allan Underdown Building Services Ltd is registered
The registered office is in Maidstone (ME15), in the Maidstone local authority area, South East. Show ME15 0ES on a map.
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What happens if Allan Underdown Building Services 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 09747058
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 August 2015 (11 years ago)
- Registered office
- Little Tortworth Busbridge Road, Loose, Maidstone, Kent, ME15 0ES
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 15 August 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 Maidstone
Other active building contractors registered in Maidstone.
- Alpha Projects (South East) Ltd2020
- An Origin Ltd2012
- Anv Building Construction Ltd2019
- Anvile Project Management Limited2026
- Applefields Ltd2002
- Aquacomp Ltd2022
- Arcouk Ltd2026
- Ark Contractors Ltd2025
All building contractors in Maidstone · All trades in Maidstone · Builders across the UK
Frequently asked questions
When are Allan Underdown Building Services Ltd's accounts due?
Allan Underdown Building Services Ltd's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Allan Underdown Building Services Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Allan Underdown Building Services Ltd still trading?
Allan Underdown Building Services 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 Allan Underdown Building Services Ltd do?
Allan Underdown Building Services Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Allan Underdown Building Services Ltd?
Allan Underdown Building Services Ltd was incorporated on 25 August 2015, 11 years ago.
Who runs Allan Underdown Building Services Ltd?
Allan Underdown Building Services Ltd has 2 active directors, the longest-serving appointed in Aug 2015. Their names and service addresses are on the Companies House register.
Who owns Allan Underdown Building Services Ltd?
2 people or companies have significant control of Allan Underdown Building Services Ltd: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if Allan Underdown Building Services 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 Allan Underdown Building Services 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.