- Companies
- Plumbers and heating engineers
- Reading
- Advanced Maintenance UK Limited
Advanced Maintenance UK Limited
- Company number
- 03568457
- Incorporated
- 21 May 199828 years trading
- Registered office
- Units 2-4 Chiltern Enterprise Centre Station Road, Theale, Reading, RG7 4AA
- Nature of business
- Plumbing, heat and air-conditioning installation
Advanced Maintenance UK Limited is a 28-year-old private limited company registered in Reading, company number 03568457, one of 221 plumbing and heating companies in Reading. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £834K (+33.6%) on the year before, to £3.3M.
- Net assets rose in 6 of 8 year-on-year comparisons on record.
- Current assets of £3.6M against £880K owed within a year: 4.1 times cover.
- 37 employees on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £3.3M | £2.2M | £3.6M | £880K | 37 |
| 31 Mar 2024 | £2.5M | £1.6M | £2.8M | £799K | 37 |
| 31 May 2023 | £2.6M | £1.2M | £2.8M | £557K | 37 |
| 31 May 2022 | £2.5M | £2.2M | £954K | 37 | |
| 31 May 2021 | £2.1M | £2M | £1.1M | 34 | |
| 31 May 2020 | £2.6M | £2M | £840K | 35 | |
| 31 May 2019 | £1.9M | £1.4M | £866K | ||
| 31 May 2018 | £1.2M | £1M | £679K | ||
| 31 May 2017 | £1M | £848K | £611K |
Public contracts won
Advanced Maintenance UK Limited has one public sector contract award on record; the ones with their own published value total £450K (2017). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Wessex Conference Centre | Mechanical Maintenance Contract | £450K | 4 Jan 2017 |
Where Advanced Maintenance UK Limited is registered
The registered office is in Reading (RG7), in the West Berkshire local authority area, South East. Show RG7 4AA on a map.
Other trade companies in RG7
- Serenity Park Homes LtdMotor traders
- J Stroud Agricultural LtdProperty developers
- Just Henry Services LtdSpecialist contractors
- The Bugfather LtdCleaning companies
- D Ray Roofing LtdRoofers
- CMK26 LimitedMotor traders
- Solstice Environments LtdPlumbers and heating engineers
- Heston Energy Solutions LimitedElectricians
What happens if Advanced Maintenance UK 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 03568457
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 May 1998 (28 years ago)
- Registered office
- Units 2-4 Chiltern Enterprise Centre Station Road, Theale, Reading, RG7 4AA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 15 February 2026
- Charges (mortgages)
- 2 outstanding of 2 registered
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Reading
Other active plumbing and heating companies registered in Reading.
- Aegean Group Ltd2023
- Ah Plumbing Ltd2023
- Ak Plumbing (Charvil) Ltd2017
- Alliance CFM Limited2020
- Alpha Heat Mechanical Ltd2019
- Ambassador F.C. Plumbing Ltd2017
- Angusplumbing Ltd2022
- Apex Gas & Plumbing Services Ltd2025
All plumbing and heating companies in Reading · All trades in Reading · Plumbers and heating engineers across the UK
Frequently asked questions
When are Advanced Maintenance UK Limited's accounts due?
Advanced Maintenance UK Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Advanced Maintenance UK Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Advanced Maintenance UK Limited still trading?
Advanced Maintenance UK 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 Advanced Maintenance UK Limited do?
Advanced Maintenance UK Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Advanced Maintenance UK Limited?
Advanced Maintenance UK Limited was incorporated on 21 May 1998, 28 years ago.
Has Advanced Maintenance UK Limited won public sector contracts?
Yes. Advanced Maintenance UK Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £450K), most recently from Wessex Conference Centre.
What is the penalty if Advanced Maintenance UK 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 Advanced Maintenance UK 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.