−£215
−101%vs Dec 2024Active15377020Private limited companyDereham
BOILER UPGRADE LTD
Significant control: Declan James Whittle (75–100%)
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
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What does Boiler Upgrade Ltd sell?
Registered activity: Plumbing, heat and air-conditioning installation (SIC 43220). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
BOILER UPGRADE LTD is an active private limited company (company number 15377020) incorporated on 30 December 2023, registered in Dereham. Its registered activity is plumbing, heat and air-conditioning installation (SIC 43220). Latest small accounts cover the period ending 31 December 2025, showing net assets of −£215 and cash of £19k, with 1 employee on average. Net assets fell 101% on the prior period (£20k).
Peer position · net assets
By net assets it sits in the lower half of 6,191 comparable companies in Other (median £5,839, upper quartile £35k).
02
Ownership and control
- Mr Declan James Whittle
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.
03
Key dates
- Incorporated
- 30 December 20232 yrs ago
- Next accounts due
- 30 September 2027in 340 days
- Confirmation statement due
- 13 January 2027in 80 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 43220
- Plumbing, heat and air-conditioning installation
- Accounts type
- Total Exemption Full
- Size band
- MicroCompanies Act thresholds
05
Financials
£19k
−60%vs Dec 2024Not reported
1
No changevs Dec 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 December 2025 | −£215 | £19k | £980 | — | — | — | 1 |
| 31 December 2024 | £20k | £47k | £2,053 | — | — | — | 1 |
| 29 December 2023 | — | — | — | — | — | — | — |
Cash per employee£19kCash ÷ average employees
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
06
Filing and accounts signals
- Net assets below zeroNet assets £-215 at 31 December 2025
- Net assets down 25% or more on the prior period-101.1% vs prior period
- Three or more accounting periods on record3 periods on record
- Incorporated two to five years agoIncorporated 30 December 2023
Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.
07
Timeline
- Next accounts duein 340 days
- Confirmation statement duein 80 days
- Accounts period endNet liabilities £215 · small accounts
- Accounts period endNet assets £20k · small accounts
- Incorporated
- Accounts period end
08
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- CMH PLUMBING AND HEATING LTDExeter · inc. Dec 2023
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- JJ CENTRAL HEATING AND PLUMBING LTDFalmouth · inc. Dec 2023
- HAS GAS HEATING & PLUMBING LTDNorthwich · inc. Dec 2023
- ECOHEAT SOUTHWEST LTDCinderford · inc. Dec 2023
- CORNWALL PLUMBER LTDPenzance · inc. Dec 2023
All companies incorporated on 30 December 2023 · in Dec 2023.
09
Reminders for BOILER UPGRADE LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.