- Company number
- 12357317
- Incorporated
- 10 Dec 20196 years trading
- Registered office
- Leofric House, 18B Binley Road, Coventry, CV3 1JN
- Nature of business
- Construction of domestic buildings
Castles One Limited is a 6-year-old private limited company registered in Coventry, company number 12357317, one of 500 building contractors in Coventry. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 30 December 2026 is due at HMRC on 30 December 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 Castles One 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 £25K (-23.4%) on the year before, to -£130K.
- Net assets rose in 0 of 5 year-on-year comparisons on record.
- Current assets of £821K against £951K owed within a year: 0.9 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Dec 2025 | -£130K | £25K | £821K | £951K | 0 |
| 30 Dec 2024 | -£105K | £2,096 | £796K | £901K | 1 |
| 30 Dec 2023 | -£82K | £28K | £819K | £901K | 1 |
| 30 Dec 2022 | -£60K | £56K | £841K | £902K | 1 |
| 30 Dec 2021 | -£5,032 | £16K | £796K | £801K | 1 |
| 30 Dec 2020 | -£3,278 | £19K | £798K | £801K | 1 |
Where Castles One Limited is registered
The registered office is in Coventry (CV3), in the Coventry local authority area, West Midlands. Show CV3 1JN on a map.
Other trade companies in CV3
- Team Property Group LtdBuilders
- Scott A West LtdMechanics and garages
- Trawally Enterprise LimitedCleaning companies
- Atlas Buildcost LtdFinishing trades
- S.E.R.F Contractors LimitedSpecialist contractors
- Pristine Cleans Dry Cleaners LimitedCleaning companies
- G.C.Ashby Construction LtdBuilders
- Roadsmith Auto Centre LimitedMechanics and garages
Also registered at this address
16 other companies use the same registered office as Castles One Limited.
- Alw Groundworks and Civils LimitedCivil engineering
- Ampersand Epm LimitedMachinery repair and installation
- Blackmore Automotive LimitedMotor traders
- Castles Property Developments LimitedBuilders
- Cavendish Holdings LimitedBuilders
- D.B. Heating & Plumbing Services LimitedPlumbers and heating engineers
- Dongor LimitedCivil engineering
- Henwar Developments LimitedProperty developers
- Keane Civil Engineering LimitedCivil engineering
- Kill All Pest Control LimitedCleaning companies
- Mercia Energy Services LimitedFinishing trades
- Motaparts Xpress (Kidderminster) LimitedMotor traders
- Motaparts Xpress (Worcester) LimitedMotor traders
- Motaparts Xpress LimitedMotor traders
- PJ Machine Tools LimitedMachinery repair and installation
- Sky Blue Developments (Coventry) LimitedProperty developers
What happens if Castles One 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 Dec 2027 | £200 |
| 3 months late | 30 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Dec 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
- 12357317
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 December 2019 (6 years ago)
- Registered office
- Leofric House, 18B Binley Road, Coventry, CV3 1JN
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 30 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 December 2025
- Last confirmation statement
- 10 December 2025
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Coventry
Other active building contractors registered in Coventry.
- Castles Property Developments Limited2012
- Cathedral Homes (Midlands) Ltd2013
- Cavallino Construction Ltd2026
- Cavendish Holdings Limited1971
- Chandi Construction UK Limited2018
- Chela Builders Limited2020
- Chris Llewellyn Building Services Limited2003
- Chrisnsoaps Ltd2026
All building contractors in Coventry · All trades in Coventry · Builders across the UK
Frequently asked questions
When are Castles One Limited's accounts due?
Castles One Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 30 December 2026.
When is Castles One Limited's CT600 due?
The CT600 for the period to 30 December 2026 is due at HMRC by 30 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Castles One Limited still trading?
Castles One 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 Castles One Limited do?
Castles One Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Castles One Limited?
Castles One Limited was incorporated on 10 December 2019, 6 years ago.
What is the penalty if Castles One 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 Castles One 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.