- Companies
- Plumbers and heating engineers
- Maidenhead
- Westminster Building Services Limited
Westminster Building Services Limited
- Company number
- 01909647
- Incorporated
- 30 Apr 198541 years trading
- Registered office
- Trios House, Reform Road, Maidenhead, Berkshire, SL6 8BY
- Nature of business
- Plumbing, heat and air-conditioning installation
Westminster Building Services Limited is a 41-year-old private limited company registered in Maidenhead, company number 01909647, one of 45 plumbing and heating companies in Maidenhead. 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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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 down £89K (-145.4%) on the year before, to -£28K.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £362K against £378K owed within a year: 1.0 times cover.
- 10 employees on average, up from 9 the year before.
- 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 |
|---|---|---|---|---|---|
| 30 Jun 2025 | -£28K | £6,797 | £362K | £378K | 10 |
| 30 Jun 2024 | £61K | £6,583 | £408K | £365K | 9 |
| 30 Jun 2023 | £124K | £159K | £834K | £687K | 9 |
| 30 Jun 2022 | -£53K | £43K | £502K | £478K | 7 |
| 30 Jun 2021 | £40K | £69K | £260K | £224K | 8 |
| 30 Jun 2020 | £54K | £29K | £286K | £242K | 9 |
| 30 Jun 2019 | £244K | £246K | £495K | £271K | 10 |
| 30 Jun 2018 | £148K | £148K | £348K | £230K | 12 |
| 30 Jun 2017 | £211K | £179K | £584K | £415K | 5 |
| 30 Jun 2016 | £371K | £455K | £650K | £287K |
Public contracts won
Westminster Building Services Limited has 3 public sector contract awards on record; the ones with their own published value total £1.5M, from 2025 to 2026. 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.
Awards by year
Main buyers
- London Borough of Wandsworth2 awards
- London Borough of Richmond upon Thames1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| London Borough of Wandsworth | Replacement HIU's and Heat Meters at Doddington Estate (Phase 1) | £874K | 22 Jun 2026 |
| London Borough of Richmond upon Thames | Boiler replacement at Meadlands Primary School | £120K | 22 Jul 2025 |
| London Borough of Wandsworth | Communal Heating & Hot Water at Yew Tree Lodge | £527K | 20 May 2025 |
Where Westminster Building Services Limited is registered
The registered office is in Maidenhead (SL6), in the Windsor and Maidenhead local authority area, South East. Show SL6 8BY on a map.
Other trade companies in SL6
- B&M Cleaning Solutions LtdCleaning companies
- CC Garden Builds LtdBuilders
- Austin Groundwork Surfaces LimitedGroundworks and demolition
- Woodnest Interiors LtdJoiners and carpenters
- Carizmatic Company LimitedMotor traders
- Sakura Electrical LtdElectricians
- Elite Autos & Tyres LtdMotor traders
- Bigfrith End LtdSpecialist contractors
What happens if Westminster Building Services 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
- 01909647
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 April 1985 (41 years ago)
- Registered office
- Trios House, Reform Road, Maidenhead, Berkshire, SL6 8BY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 27 June 2026
- Charges (mortgages)
- 1 outstanding of 3 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 Maidenhead
Other active plumbing and heating companies registered in Maidenhead.
- WM Bathrooms Limited2020
- Zephyrairsolutions Ltd2025
- Aasj Plumbing and Heating Services Ltd2025
- Ab Refurb Ltd2024
- Air Intelligence Ltd2012
- Ams Plumbing & Heating Solutions Ltd2026
- Bexley Heating Services Ltd2010
- Braywick Heating Limited2021
All plumbing and heating companies in Maidenhead · All trades in Maidenhead · Plumbers and heating engineers across the UK
Frequently asked questions
When are Westminster Building Services Limited's accounts due?
Westminster Building Services 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 Westminster Building Services 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 Westminster Building Services Limited still trading?
Westminster Building Services 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 Westminster Building Services Limited do?
Westminster Building Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Westminster Building Services Limited?
Westminster Building Services Limited was incorporated on 30 April 1985, 41 years ago.
Has Westminster Building Services Limited won public sector contracts?
Yes. Westminster Building Services Limited has 3 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £1.5M), most recently from London Borough of Wandsworth.
What is the penalty if Westminster Building Services 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 Westminster Building Services 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.