- Companies
- Specialist contractors
- Iver
- Kintherm Limited
Kintherm Limited
- Company number
- 12420196
- Incorporated
- 23 Jan 20206 years trading
- Registered office
- Bathurst House, 50 Bathurst Walk, Iver, Buckinghamshire, SL0 9BH
- Nature of business
- Other specialised construction activities n.e.c.; Management consultancy activities other than financial management; Engineering design activities for industrial process and production; Engineering related scientific and technical consulting activities
Kintherm Limited is a 6-year-old private limited company registered in Iver, company number 12420196, one of 7 specialist construction companies in Iver. 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.
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 Kintherm 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 up £90K (+6.2%) on the year before, to £1.6M.
- Net assets rose in 4 of 5 year-on-year comparisons on record.
- 2 employees on average during the year.
- Balance sheets on record for 6 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £1.6M | £2.2M | £668K | 2 | |
| 31 Dec 2024 | £1.5M | £3.2M | £3.2M | £1.8M | 2 |
| 31 Dec 2023 | £457K | £554K | £1.3M | £943K | 2 |
| 31 Dec 2022 | -£13K | £1,300 | £1,300 | £16K | 1 |
| 31 Dec 2021 | £8,273 | £1,507 | £11K | 1 | |
| 31 Jan 2021 | £2,085 | £54K | £57K | 1 |
Where Kintherm Limited is registered
The registered office is in Iver (SL0), in the Buckinghamshire local authority area, South East. Show SL0 9BH on a map.
Other trade companies in SL0
- G Turna Construction LimitedBuilders
- PSG Engineering Services LtdCivil engineering
- Drive on Demand LtdMotor traders
- Slick Autos LimitedMechanics and garages
- Aa Salvage Services LtdMotor traders
- Pana Construction LtdProperty developers
- Waste Rescue LimitedMechanics and garages
- Raja Builder Property Services LtdProperty developers
Also registered at this address
7 other companies use the same registered office as Kintherm Limited.
- A Slade LtdPlumbers and heating engineers
- East House (Wentworth) LtdBuilders
- Envisioned Property LimitedFinishing trades
- Penn Design LimitedBuilders
- R.A.S. Installations LimitedElectricians
- RC Dowling LtdElectricians
- Suri Design and Build LtdProperty developers
What happens if Kintherm 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 | 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
- 12420196
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 January 2020 (6 years ago)
- Registered office
- Bathurst House, 50 Bathurst Walk, Iver, Buckinghamshire, SL0 9BH
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Management consultancy activities other than financial management (SIC 70229)
Engineering design activities for industrial process and production (SIC 71121)
Engineering related scientific and technical consulting activities (SIC 71122) - Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 22 January 2026
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 Iver
Other active specialist construction companies registered in Iver.
- London Timber Buildings Ltd2015
- SP73 Ltd2019
- We Manage Damp Ltd2025
- A Lester Ltd2021
- Astara Residential Solutions Ltd2026
- Bldex-UK Limited2020
All specialist construction companies in Iver · All trades in Iver · Specialist contractors across the UK
Frequently asked questions
When are Kintherm Limited's accounts due?
Kintherm Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Kintherm Limited'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 Kintherm Limited still trading?
Kintherm 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 Kintherm Limited do?
Kintherm Limited is registered under Other specialised construction activities n.e.c. (SIC 43999); Management consultancy activities other than financial management (SIC 70229); Engineering design activities for industrial process and production (SIC 71121); Engineering related scientific and technical consulting activities (SIC 71122).
How old is Kintherm Limited?
Kintherm Limited was incorporated on 23 January 2020, 6 years ago.
What is the penalty if Kintherm 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 Kintherm 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.