- Companies
- Property developers
- Tredegar
- Atmo Engineering Limited
Atmo Engineering Limited
- Company number
- 10365909
- Incorporated
- 8 Sep 201610 years trading
- Registered office
- 18 Carn Y Tyla, Abertysswg, Rhymney, Tredegar, NP22 5AF
- Nature of business
- Development of building projects; Construction of other civil engineering projects n.e.c.; Other construction installation
Atmo Engineering Limited is a 10-year-old private limited company registered in Tredegar, company number 10365909, one of 14 property development companies in Tredegar. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Atmo Engineering LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £533 (-0.2%) on the year before, to £273K.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £302K against £29K owed within a year: more than 10 times cover.
- 1 employee 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 |
|---|---|---|---|---|---|
| 30 Nov 2025 | £273K | £182 | £302K | £29K | 1 |
| 30 Nov 2024 | £273K | £1,007 | £302K | £29K | 1 |
| 30 Nov 2023 | £274K | £219 | £302K | £28K | 1 |
| 30 Nov 2022 | £277K | £565 | £301K | £24K | 1 |
| 30 Nov 2021 | £222K | £21K | £268K | £46K | 1 |
| 30 Nov 2020 | £182K | £120K | £267K | £84K | 1 |
| 30 Nov 2019 | £128K | £56K | £177K | £49K | 1 |
| 30 Nov 2018 | £105K | £10K | £137K | £32K | 1 |
| 30 Sep 2017 | £25K | £32K | £61K | £37K | 1 |
Where Atmo Engineering Limited is registered
The registered office is in Tredegar (NP22), in the Caerphilly local authority area, Wales. Show NP22 5AF on a map.
Other trade companies in NP22
- Apt Site Services LtdCleaning companies
- Acr Property Maintenance LtdPainters and decorators
- Bobsdrywall LtdFinishing trades
- Solar Smart LimitedElectricians
- Parade Standard LtdCleaning companies
- Basement Waterproofing Supplies LtdSpecialist contractors
- RB Style Glazing LtdGlaziers
- Harrico Capital Investments LtdProperty developers
Also registered at this address
1 other company uses the same registered office as Atmo Engineering Limited.
- TGM Building and Engineering Services LtdElectricians
What happens if Atmo Engineering 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 10365909
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 September 2016 (10 years ago)
- Registered office
- 18 Carn Y Tyla, Abertysswg, Rhymney, Tredegar, NP22 5AF
- Nature of business
- Development of building projects (SIC 41100)
Construction of other civil engineering projects n.e.c. (SIC 42990)
Other construction installation (SIC 43290) - Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 7 September 2025
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Tredegar
Other active property development companies registered in Tredegar.
- C & K Property Developments Rhymney Limited2024
- Darsons Building Services Ltd2021
- Forest Valley Housing Ltd2019
- Harrico Capital Investments Ltd2026
- Imax Developments Limited2023
- JB Building & Maintenance Limited2021
- JCP Construction & Maintenance Ltd2018
- L&C Home Renovations Limited2024
All property development companies in Tredegar · All trades in Tredegar · Property developers across the UK
Frequently asked questions
When are Atmo Engineering Limited's accounts due?
Atmo Engineering Limited's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Atmo Engineering Limited's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Atmo Engineering Limited still trading?
Atmo Engineering Limited is listed as active on the Companies House register (checked 12 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 Atmo Engineering Limited do?
Atmo Engineering Limited is registered under Development of building projects (SIC 41100); Construction of other civil engineering projects n.e.c. (SIC 42990); Other construction installation (SIC 43290).
How old is Atmo Engineering Limited?
Atmo Engineering Limited was incorporated on 8 September 2016, 10 years ago.
What is the penalty if Atmo Engineering 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 Atmo Engineering Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.