- Companies
- Property developers
- Sidcup
- Carbonspring (Sidcup) Limited
Carbonspring (Sidcup) Limited
- Company number
- 10007120
- Incorporated
- 16 Feb 201610 years trading
- Registered office
- 12 Hatherley Road, Sidcup, Kent, DA14 4DT
- Nature of business
- Development of building projects; Buying and selling of own real estate; Renting and operating of Housing Association real estate; Management of real estate on a fee or contract basis
Carbonspring (Sidcup) Limited is a 10-year-old private limited company registered in Sidcup, company number 10007120, one of 113 property development companies in Sidcup. Its next accounts are due at Companies House on 30 November 2027, and the CT600 for the period to 28 February 2027 is due at HMRC on 28 February 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 up £50K (+103.6%) on the year before, to £1,732.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £3.5M against £3.5M owed within a year: 1.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2026 | £1,732 | £16K | £3.5M | £3.5M | 1 |
| 28 Feb 2025 | -£48K | £9,117 | £3.6M | £3.7M | 1 |
| 29 Feb 2024 | -£48K | £66K | £2.5M | £2.6M | 0 |
| 28 Feb 2023 | -£21K | £1.3M | £1.4M | 0 | |
| 28 Feb 2022 | -£7,594 | £1.9M | £1.9M | 0 | |
| 28 Feb 2021 | -£4,715 | £220K | £225K | 0 | |
| 29 Feb 2020 | -£3,793 | £145K | £148K | 0 | |
| 28 Feb 2019 | -£2,943 | £99K | £102K | ||
| 28 Feb 2018 | -£2,257 | £41K | £44K | ||
| 28 Feb 2017 | -£1,602 | £28K | £30K |
Where Carbonspring (Sidcup) Limited is registered
The registered office is in Sidcup (DA14), in the Bexley local authority area, London. Show DA14 4DT on a map.
Other trade companies in DA14
- Evlor LtdElectricians
- Pfe Services LimitedElectricians
- CJM Property Services LimitedFinishing trades
- Top Local Trader LtdBuilders
- Bassett Electrical Group LimitedElectricians
- Flatline Flooring LtdFloor and wall tilers
- LDT Service's LimitedScaffolders
- Old Maidstone Road Hand Car Wash LtdMechanics and garages
Shared registered office
427 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 Carbonspring (Sidcup) 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 30 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2027 to 31 Dec 2027 | £150 |
| 1 to 3 months late | 1 Jan 2028 to 29 Feb 2028 | £375 |
| 3 to 6 months late | 1 Mar 2028 to 31 May 2028 | £750 |
| More than 6 months late | From 1 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 10007120
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 February 2016 (10 years ago)
- Registered office
- 12 Hatherley Road, Sidcup, Kent, DA14 4DT
- Nature of business
- Development of building projects (SIC 41100)
Buying and selling of own real estate (SIC 68100)
Renting and operating of Housing Association real estate (SIC 68201)
Management of real estate on a fee or contract basis (SIC 68320) - Year end
- 29 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2026
- Last confirmation statement
- 12 November 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 Sidcup
Other active property development companies registered in Sidcup.
- Cdo Brighton Road Ltd2022
- Cdo Developments London Ltd2021
- Change24 Ltd2024
- Chartes Surveyors Limited2013
- Cheviot Construction Ltd2014
- CMB Management Services Limited2000
- Compton Court (Sussex) Limited2012
- DTK Building Specialists Limited2019
All property development companies in Sidcup · All trades in Sidcup · Property developers across the UK
Frequently asked questions
When are Carbonspring (Sidcup) Limited's accounts due?
Carbonspring (Sidcup) Limited's next accounts are due at Companies House by 30 November 2027 (in 413 days), covering the period to 28 February 2027.
When is Carbonspring (Sidcup) Limited's CT600 due?
The CT600 for the period to 28 February 2027 is due at HMRC by 28 February 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2027.
Is Carbonspring (Sidcup) Limited still trading?
Carbonspring (Sidcup) 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 Carbonspring (Sidcup) Limited do?
Carbonspring (Sidcup) Limited is registered under Development of building projects (SIC 41100); Buying and selling of own real estate (SIC 68100); Renting and operating of Housing Association real estate (SIC 68201); Management of real estate on a fee or contract basis (SIC 68320).
How old is Carbonspring (Sidcup) Limited?
Carbonspring (Sidcup) Limited was incorporated on 16 February 2016, 10 years ago.
What is the penalty if Carbonspring (Sidcup) 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 Carbonspring (Sidcup) 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.