- Companies
- Plumbers and heating engineers
- Cosham
- Simer Environmental Services Limited
Simer Environmental Services Limited
- Company number
- 01297168
- Incorporated
- 4 Feb 197749 years trading
- Registered office
- 81 High Street, Cosham, Hampshire, PO6 3BL
- Nature of business
- Plumbing, heat and air-conditioning installation
Simer Environmental Services Limited is a 49-year-old private limited company registered in Cosham, company number 01297168, one of 7 plumbing and heating companies in Cosham. 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 down £13K (-1.3%) on the year before, to £1M.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £1.2M against £258K owed within a year: 4.7 times cover.
- 15 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 Mar 2025 | £1M | £770K | £1.2M | £258K | 15 |
| 31 Mar 2024 | £1M | £713K | £1.3M | £303K | 15 |
| 31 Mar 2023 | £919K | £614K | £1.1M | £218K | 14 |
| 31 Mar 2022 | £887K | £572K | £176K | 12 | |
| 31 Mar 2021 | £856K | £681K | £354K | 16 | |
| 31 Mar 2020 | £859K | £796K | £402K | 18 | |
| 31 Mar 2019 | £904K | £480K | £953K | ||
| 31 Mar 2018 | £796K | £550K | £555K | ||
| 31 Mar 2017 | £740K | £565K | |||
| 31 Mar 2016 | £688K | £535K | £509K |
Public contracts won
Simer Environmental Services Limited has 45 public sector contract awards on record; the ones with their own published value total £3.9M, from 2017 to 2026. Source: Contracts Finder and Find a Tender award notices. For 2 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. 34 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Hampshire County Council40 awards
- Hampshire County Council2 awards
- Portsmouth City Council1 award
- Southampton City Council1 award
- Bramshott & Liphook Parish Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Hampshire County Council | Four Lanes Infant School - Htg and Vent Improvements - Radiator Mods | £4,002 | 11 Aug 2026 |
| Hampshire County Council | Willow Court Nursing Care Home, Marlfield Nursing Care Unit, Westholme Residential Care Home And Nursing Care Home, Forest Court Nursing Care Home Mechanical Works | £24K | 7 Aug 2026 |
| Hampshire County Council | Gomer Infant School Water Services Improvements | £77K | 24 Jun 2026 |
| Hampshire County Council | Wavell School Boiler Replacement - Phase 2 Main Boiler Room | £228K | 23 Jun 2026 |
| Hampshire County Council | Buriton Primary School Main Block Boiler Replacement | £41K | 4 Jun 2026 |
| Hampshire County Council | Rownhams St Johns CE (C) Primary School - Replace KS1 Boiler | £78K | 1 Jun 2026 |
| Hampshire County Council | Orchard Junior School Boiler Upgrade | £115K | 8 Apr 2026 |
| Hampshire County Council | Replace Main Plant Room Boilers - Winklebury Junior School | £83K | 7 Apr 2026 |
| Hampshire County Council | MWF_Lot 6_Red Barn Primary School_Ventilation Improvements - AWARD | £101K | 22 Jan 2026 |
| Hampshire County Council | MWF - Lot 6 - New Milton Library - Accessible Toilet and Baby Changing Room Ventilation - AWARD | £3,699 | 15 Jan 2026 |
Showing the 10 most recent of 45.
Where Simer Environmental Services Limited is registered
The registered office is in Cosham (PO6), in the Portsmouth local authority area, South East. Show PO6 3BL on a map.
Other trade companies in PO6
- Bellagio Partners LtdBuilders
- Cpenw LtdMachinery repair and installation
- Marla Brickwork & Construction LtdProperty developers
- Miracles in Metal LtdMechanics and garages
- FH Fire & Electrical LtdElectricians
- Thomcore LimitedSpecialist contractors
- JMS Southern LtdElectricians
- The Motum Group LtdSpecialist contractors
Shared registered office
56 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Simer Environmental 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 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
- 01297168
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 February 1977 (49 years ago)
- Registered office
- 81 High Street, Cosham, Hampshire, PO6 3BL
- 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
- 31 December 2025
- Charges (mortgages)
- 1 outstanding of 4 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 Cosham
Other active plumbing and heating companies registered in Cosham.
- SW Gas Services Ltd2020
- Thane Gas Services Ltd2013
- Vincent Home Improvement Limited2017
- Flare Plumbing & Heating Ltd2025
- Goldring Plumbing & Heating Limited2007
- M and F Air Conditioning Ltd2009
All plumbing and heating companies in Cosham · All trades in Cosham · Plumbers and heating engineers across the UK
Frequently asked questions
When are Simer Environmental Services Limited's accounts due?
Simer Environmental Services Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Simer Environmental Services 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 Simer Environmental Services Limited still trading?
Simer Environmental 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 Simer Environmental Services Limited do?
Simer Environmental Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Simer Environmental Services Limited?
Simer Environmental Services Limited was incorporated on 4 February 1977, 49 years ago.
Has Simer Environmental Services Limited won public sector contracts?
Yes. Simer Environmental Services Limited has 45 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £3.9M), most recently from Hampshire County Council.
What is the penalty if Simer Environmental 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 Simer Environmental 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.