- Companies
- Specialist contractors
- Hatfield
- Krypton Building Services Ltd
Krypton Building Services Ltd
- Company number
- 11728500
- Incorporated
- 14 Dec 20187 years trading
- Registered office
- 3 Bishops Square, Hatfield, AL10 9NA
- Nature of business
- Other specialised construction activities n.e.c.
Krypton Building Services Ltd is a 7-year-old private limited company registered in Hatfield, company number 11728500, one of 29 specialist construction companies in Hatfield. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
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 £390K (+93.9%) on the year before, to £805K.
- Net assets rose in 5 of 6 year-on-year comparisons on record.
- Current assets of £3M against £2.2M owed within a year: 1.4 times cover.
- 11 employees on average, up from 9 the year before.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £805K | £1.5M | £3M | £2.2M | 11 |
| 31 Dec 2024 | £415K | £999K | £1.5M | £1.1M | 9 |
| 31 Dec 2023 | £184K | £610K | £1.5M | £1.3M | 4 |
| 31 Dec 2022 | £82K | £383K | £293K | 1 | |
| 31 Dec 2021 | -£57K | £425K | £511K | £568K | 1 |
| 31 Dec 2020 | -£97K | £39K | £93K | £129K | 0 |
| 31 Dec 2019 | -£48K | £2,437 | £4,129 | £1,013 | 0 |
Where Krypton Building Services Ltd is registered
The registered office is in Hatfield (AL10), in the Welwyn Hatfield local authority area, East of England. Show AL10 9NA on a map.
Other trade companies in AL10
- Hiwa Shine LtdCleaning companies
- M1 Construction LtdBuilders
- Tyg Landscaping LimitedLandscapers and gardeners
- RR Roofing Services LtdBuilders
- Tyg Bathrooms and Kitchens LimitedBuilders
- Knights Decorating LtdPainters and decorators
- Gvre LimitedBuilders
- Urbn Developments (Hertfordshire) LimitedFinishing trades
Also registered at this address
1 other company uses the same registered office as Krypton Building Services Ltd.
- Stealth Cleaning Services LtdCleaning companies
What happens if Krypton Building Services 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 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 | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 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
- 11728500
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 December 2018 (7 years ago)
- Registered office
- 3 Bishops Square, Hatfield, AL10 9NA
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 12 August 2026
- Previous names
- Krypton Healthcare Limited (until 2 Sep 2022)
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Hatfield
Other active specialist construction companies registered in Hatfield.
- L J Parker Limited2017
- LMT Confined Space Rescue Services Ltd2024
- Mechanical & Plumbing Services London Limited2023
- Melemm Ltd2023
- MGN Construction Services Limited2012
- MN-Renovation Limited2024
- N C D Contractors Ltd2015
- Newline Logic Limited2016
All specialist construction companies in Hatfield · All trades in Hatfield · Specialist contractors across the UK
Frequently asked questions
When are Krypton Building Services Ltd's accounts due?
Krypton Building Services Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Krypton Building Services Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Krypton Building Services Ltd still trading?
Krypton Building Services 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 Krypton Building Services Ltd do?
Krypton Building Services Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Krypton Building Services Ltd?
Krypton Building Services Ltd was incorporated on 14 December 2018, 7 years ago.
What is the penalty if Krypton Building Services 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 Krypton Building Services 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.