- Companies
- Installers
- Rainham
- Siera Ltd
Siera Ltd
- Company number
- 11584768
- Incorporated
- 24 Sep 20188 years trading
- Registered office
- 82 Rainham Road, Rainham, Essex, RM13 7RJ
- Nature of business
- Other construction installation
Siera Ltd is a 8-year-old private limited company registered in Rainham, company number 11584768, one of 27 installation companies (insulation, lifts, shutters and similar) in Rainham. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £7,810 (-6.4%) on the year before, to £114K.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £129K against £25K owed within a year: 5.2 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 7 years, 2020 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £114K | £129K | £25K | 1 | |
| 31 Mar 2025 | £122K | £120K | £10K | 1 | |
| 31 Mar 2024 | £169K | £169K | £15K | 1 | |
| 31 Mar 2023 | £149K | £152K | £22K | 1 | |
| 31 Mar 2022 | £85K | £68K | £6,338 | 1 | |
| 31 Mar 2021 | £76K | £81K | £17K | 1 | |
| 29 Feb 2020 | £49K | £53K | £15K |
Where Siera Ltd is registered
The registered office is in Rainham (RM13), in the Havering local authority area, London. Show RM13 7RJ on a map.
Other trade companies in RM13
- MM Motor Capital LtdMotor traders
- Namto LtdBuilders
- Digline Utilities LtdBuilders
- A & M Heating Plumbing LimitedPlumbers and heating engineers
- Cultured Auto LtdMechanics and garages
- Skyway Home LtdSpecialist contractors
- Car Sales Direct LtdMotor traders
- TLL Engineering Ltd LtdBuilders
Also registered at this address
22 other companies use the same registered office as Siera Ltd.
- Aj Catering Engineers LtdMachinery repair and installation
- Burke Demolition LtdGroundworks and demolition
- Calcor Building Contractors LtdProperty developers
- Calcor Exteriors LtdFloor and wall tilers
- Call Cleaning Services LtdCleaning companies
- Call Jim LtdPlumbers and heating engineers
- Call Property Solutions LtdCleaning companies
- Crawford Glass of London LimitedGlaziers
- Doorey Building & Maintenance Contractors LtdProperty developers
- Elite Roofing Services (London) LtdRoofers
- Essex Eco LtdPlumbers and heating engineers
- First Call Engineering LtdMachinery repair and installation
- Hawksgrove Building & Maintenance LtdFinishing trades
- Hills Car Body Repairs LtdMechanics and garages
- J. Price Heating LtdPlumbers and heating engineers
- JPH Facilities and Maintenance LtdInstallers
- JW Construction Management LtdProperty developers
- Lvco LtdRepair services
- Me2U Car Registrations LtdMotor traders
- Mline (Essex) LtdMechanics and garages
- Unique Engineering Services (UK) LtdMachinery repair and installation
- Westcliff T and D LtdProperty developers
What happens if Siera 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 11584768
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 September 2018 (8 years ago)
- Registered office
- 82 Rainham Road, Rainham, Essex, RM13 7RJ
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 22 September 2026
- Previous names
- Opifex Ltd (until 3 Oct 2018)
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Rainham
Other active installation companies (insulation, lifts, shutters and similar) registered in Rainham.
- Suppress Limited2017
- The Energy Fixers Ltd2026
- Aeeiw Ltd2023
- Aly Lifts Ltd2018
- Archiclad (UK) Limited2016
- Building Design & Renovations Ltd2026
- Cave Construction Limited2001
- Dash-NG Building Solutions Ltd2020
All installation companies (insulation, lifts, shutters and similar) in Rainham · All trades in Rainham · Installers across the UK
Frequently asked questions
When are Siera Ltd's accounts due?
Siera Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Siera Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Siera Ltd still trading?
Siera 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 Siera Ltd do?
Siera Ltd is registered under Other construction installation (SIC 43290).
How old is Siera Ltd?
Siera Ltd was incorporated on 24 September 2018, 8 years ago.
What is the penalty if Siera 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 Siera 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.