Company profile · Builders
Keystone Developments (Building Derby) Ltd
Keystone Developments (Building Derby) Ltd is a 11-year-old private limited company registered in Belper, company number 09445355, one of 35 building contractors in Belper. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 28 February 2025, as filed at Companies House.
Keystone Developments (Building Derby) Ltd over the years
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 £8,167 (+172.4%) on the year before, to £13K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £59K against £49K owed within a year: 1.2 times cover.
- 3 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 |
|---|---|---|---|---|---|
| 28 Feb 2025 | £13K | £1,306 | £59K | £49K | 3 |
| 28 Feb 2024 | £4,738 | £13K | £58K | £49K | 3 |
| 28 Feb 2023 | £2,072 | £3,511 | £50K | £36K | 2 |
| 28 Feb 2022 | £1,468 | £7,085 | £51K | £31K | 3 |
| 28 Feb 2021 | -£4,954 | £22K | £69K | £36K | 4 |
| 28 Feb 2020 | £9,086 | £7,616 | £26K | £24K | 4 |
| 28 Feb 2019 | £3,828 | £11K | £27K | £32K | |
| 28 Feb 2018 | £3,549 | £8,625 | £20K | £27K | 3 |
| 28 Feb 2017 | £950 | £12K | £18K | ||
| 28 Feb 2016 | £879 | £6,576 | £10K | £13K |
Where Keystone Developments (Building Derby) Ltd is registered
The registered office is in Belper (DE56), in the Amber Valley local authority area, East Midlands. Show DE56 1AR on a map.
Other trade companies in DE56
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- Moylan & Parkin Property Investments LimitedProperty developers
- JWT Construction LtdBuilders
- Kingfisher Property SVS LtdInstallers
- Amber Building Services LtdBuilders
- R.G.Harrison LtdPlumbers and heating engineers
- Fonegoodsbelper LtdMachinery repair and installation
- H & R Property and Renovations LimitedBuilders
Also registered at this address
21 other companies use the same registered office as Keystone Developments (Building Derby) Ltd.
- A.L.E.B. Property LtdProperty developers
- Amberbuild LtdCivil engineering
- Ans Training Solutions LtdSpecialist contractors
- Auto Additions Nationwide LimitedMachinery repair and installation
- Belper Developments LimitedProperty developers
- Brough Services (Derby) LimitedInstallers
- C J Bradshaw LtdMachinery repair and installation
- Eyden Signs LimitedSpecialist contractors
- HRS Plumbing and Heating LtdPlumbers and heating engineers
- Icon Motor Company LimitedMechanics and garages
- JB Electrical Systems LtdElectricians
- Jkam LtdCivil engineering
- KDM Consultancy Services LtdSpecialist contractors
- Langley Landscaping Services LimitedLandscapers and gardeners
- New Oak Developments LtdSpecialist contractors
- NKR Developments LimitedProperty developers
- R J Glanville LimitedMechanics and garages
- S & S Shetliffe LimitedPlumbers and heating engineers
- SJM Interiors (Midlands) LimitedInstallers
- Swadlincote Fabrication LtdMachinery repair and installation
- The Tyre Brigade (GB) LimitedMechanics and garages
What happens if Keystone Developments (Building Derby) 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 09445355
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 February 2015 (11 years ago)
- Registered office
- 8 Chapel Street, Belper, Derbyshire, DE56 1AR
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 18 February 2026
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 Belper
Other active building contractors registered in Belper.
- Mirkwood Restoration Ltd2026
- Oakline Joinery Ltd2026
- PW Site Engineering Ltd2016
- QB Building Solutions Ltd.2022
- RJ Joinery & Building Ltd2024
- SG Design and Build (Architectural) Ltd2024
- SG Design and Build (Construction) Ltd2023
- Spires Homes Limited2005
All building contractors in Belper · All trades in Belper · Builders across the UK
Frequently asked questions
When are Keystone Developments (Building Derby) Ltd's accounts due?
Keystone Developments (Building Derby) Ltd's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Keystone Developments (Building Derby) Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Keystone Developments (Building Derby) Ltd still trading?
Keystone Developments (Building Derby) 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 Keystone Developments (Building Derby) Ltd do?
Keystone Developments (Building Derby) Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Keystone Developments (Building Derby) Ltd?
Keystone Developments (Building Derby) Ltd was incorporated on 18 February 2015, 11 years ago.
What is the penalty if Keystone Developments (Building Derby) 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 Keystone Developments (Building Derby) Ltd on Companies House for filed documents, officers and the full history.
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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.