Key Points
- Green Party deputy leader and London Assembly Member Zack Polanski has pledged to fully pay any outstanding council tax liabilities linked to his time living on an East London houseboat.
- The local authority, the London Borough of Waltham Forest, is still investigating the matter and has not yet determined whether a council tax debt exists or issued a final bill.
- Financial estimates suggest the potential tax bill could range between £3,000 and £4,000, covering a residency period from August 2022 until recently.
- The Greater London Authority (GLA) monitoring officer, Rory McKenna, officially cleared Mr Polanski of breaching the authority’s Code of Conduct, ruling that the matter involved personal living arrangements and fell outside the scope of his public role.
- Mr Polanski has strongly denied any intent to evade tax, attributing the situation to an “unintentional mistake” stemming from a misunderstanding of how council tax applies to permanently moored narrowboats compared to his past experiences with property guardianship.
- Political opponents from the Conservative and Labour parties had triggered the complaints, with some questioning his voting eligibility on regional tax matters, which the GLA monitoring officer ultimately dismissed.
East London (East London Times) July 6, 2026 – Green Party leader and London Assembly Member Zack Polanski has confirmed he will fully settle any outstanding council tax liabilities he may owe after a formal investigation by the Greater London Authority (GLA) cleared him of breaching City Hall’s ethical code of conduct. The political row focuses on a narrowboat moored at a marina in the Lee Valley Park area, within the jurisdiction of the London Borough of Waltham Forest, which served as a residence for Mr Polanski and his partner for approximately three years starting in August 2022. While political opponents have demanded answers regarding potential unpaid taxes estimated between £3,000 and £4,000, Mr Polanski revealed that local authority officials have yet to determine whether he actually owes any money or faces a formal bill, citing the complex administrative overlap of local council tax laws and commercial business rates at maritime moorings.
Why Was Zack Polanski Cleared by the City Hall Watchdog?
The controversy officially reached City Hall following formal complaints lodged by political opponents, including Conservative London Assembly Member Neil Garratt, who called for a comprehensive investigation into whether Mr Polanski had broken the standards required of elected regional officials. However, as reported by Chief Political Correspondent Rachael Burford of The Evening Standard, the GLA’s monitoring officer, Rory McKenna, issued a definitive ruling concluding that “no further action” would be taken against the Green Party politician.
In the official assessment report, Mr McKenna stated that the council tax position arose “solely from his personal living arrangements” and bore no
“sufficient link to the member’s public role.”
The monitoring officer explicitly declared that the conduct complained of fell outside the scope of the GLA Code of Conduct because Mr Polanski was not acting in an official capacity when managing his household administration.
Furthermore, the investigation addressed specific allegations regarding whether Mr Polanski should have been disqualified from taking part in crucial City Hall financial votes.
As reported by Rowena Mason, Whitehall Editor for The Guardian, the monitoring officer’s report clarified that Mr Polanski was not subject to statutory exclusions from voting on regional tax matters. Mr McKenna noted:
“The decisions in which he took part were to set the GLA’s annual council tax requirement: those decisions had no bearing on the question of whether he was personally liable for council tax in respect of the houseboat. The situation might have been different had Mr Polanski owed arrears of council tax at the time of participating in those decisions. However, as I have previously advised the GLA, Mr Polanski was not subject to the exclusion from voting on council tax matters because he did not owe any arrears of council tax at the time of casting his votes.”
Following the publication of the clearance report, a spokesperson for the Green Party issued an official statement asserting:
“The monitoring officer for the Greater London Authority has conducted an independent inquiry into the complaints made against Mr Polanski and decided to take no further action. We therefore consider this matter closed.”
How Did the Narrowboat Council Tax Confusion Arise?
The roots of the dispute lie in the complex and often ambiguous legal definitions surrounding maritime residential status in the United Kingdom. As reported by Kevin Schofield, Political Editor for HuffPost UK, government guidelines dictate that an individual is liable to pay standard council tax on a boat or vessel only if it represents their “sole or main residence.”
If a vessel is moored at a continuous cruising license or within a marina where the site operator pays non-domestic business rates, individual council tax bills are frequently not automatically generated for the berths.
In a comprehensive witness statement submitted to the monitoring officer on June 10, Mr Polanski detailed his housing history to explain his financial assumptions. He noted that prior to moving onto the narrowboat in August 2022, he had lived across London as a “property guardian”—an unconventional arrangement where individuals occupy otherwise vacant commercial or residential buildings in exchange for low license fees. Under those specific guardian programs, utilities and council tax liabilities were fully wrapped into a single license fee paid directly to the management provider.
According to The Independent, Mr Polanski wrote in his statement:
“Whilst unconventional, this became my normal experience of housing administration and associated household outgoings. My previous living arrangements reflected those circumstances rather than any attempt to avoid financial obligations.”
Mr Polanski added that when he transitioned to the narrowboat, he genuinely believed that any local authority tax obligations were already captured within the regular mooring fees paid directly to the marina operator, as the site largely pays commercial business rates rather than residential council tax bands.
However, external independent analyses cast doubt on the durability of that defense. Tax expert Dan Neidle, founder of the independent group Tax Policy Associates, reviewed the public details of the case and noted that if the narrowboat was indeed the primary home of Mr Polanski and his partner for three consecutive years, the boat and its specific mooring should have been officially entered into the local council tax valuation list, making the occupants directly liable for separate residential billings.
What Has Zack Polanski Said in Response to the Allegations?
Appearing live on BBC Breakfast to address the public scrutiny, Mr Polanski defended his integrity while openly admitting to a lack of oversight regarding his personal administrative affairs.
He stated that calculating the exact tax requirements for boat dwellers remains highly “complicated,” pointing out that the physical site of the marina falls directly on the border of two distinct local authorities, adding further bureaucratic delays to the ongoing review.
As recorded by The Guardian, Mr Polanski wrote in his formal legal submission:
“I readily acknowledge that I did not undertake further enquiries at the time regarding the specific council tax implications of living on a narrowboat. This is why I have already unreservedly apologised for that unintentional mistake. However, I wish to make absolutely clear that there was never any intention on my part to evade council tax, avoid legal obligations, or obtain any improper financial advantage.”
Mr Polanski also contextualised his living conditions by highlighting his personal history with the broader London housing crisis, stating:
“I have personal experience of financial hardship and housing insecurity. Having lived through periods of economic difficulty on a limited income, I understand first-hand the challenges faced by many Londoners.”
To signal his commitment to transparency, the Green Party leader announced a dual-path financial pledge. If the London Borough of Waltham Forest concludes its independent investigation and finds him legally liable for council tax, he will immediately pay the full sum, which he estimates could sit between £3,000 and £4,000.
Conversely, Mr Polanski stated that if the local town hall officially determines that no council tax liability exists under the marina’s current business rate structure, he will make a voluntary charitable donation equivalent to that full amount to a dedicated regional homelessness charity.
How Have Opposing Political Parties Reacted to the Case?
The disclosure of the tax dispute originally triggered sharp criticism from opposing political camps, who accused the high-profile Green politician of failing to maintain the standards expected of an elected lawmaker. Prior to the GLA clearing the case, Conservative Assembly Member Neil Garratt challenged the lack of immediate documentation, stating publicly:
“People rightly expect senior politicians to follow the rules and pay the taxes they impose on others. If Mr Polanski paid all his council tax, why is he refusing to answer direct questions about when and where he paid it?”
The case was further complicated by conflicting initial descriptions regarding how often Mr Polanski actually resided on the vessel. Media reports from The Times and The Daily Mail highlighted that an advertisement for the sale of the narrowboat written by Mr Polanski’s partner referred to it as their “gorgeous community” and “amazing home,” from which they were moving back into a traditional house.
Simultaneously, early statements from party representatives suggested he may have only stayed on the boat “occasionally” while maintaining a separate mailing address and voter registration at a nearby property where council tax was included.
While political critics argued that occasional use would raise separate legal issues regarding electoral roll declarations, Mr Polanski’s legal team fiercely rejected the attacks. In formal correspondence sent to City Hall, his lawyers characterised the complaints as “vexatious,” “politically motivated,” and representative of “tit-for-tat” political maneuvering designed to gain partisan advantages ahead of upcoming electoral cycles.
Other political figures came forward to highlight the systemic ambiguity faced by live-aboard boaters. Speaking on the BBC’s Politics Live, veteran Green Party peer Baroness Jenny Jones defended Mr Polanski by sharing her own direct experiences, stating:
“I’ve lived on a houseboat in London and we didn’t pay council tax,”
illustrating that the confusion surrounding marina billing practices is widespread within the riverboat community.
Background of the Particular Development
The public dispute involving Zack Polanski shines a spotlight on a long-standing, murky area of British local government finance: how the Local Government Finance Act 1992 applies to unconventional, mobile, and maritime habitations.
Across the United Kingdom, and particularly within London’s congested waterways, thousands of residents have turned to narrowboats, houseboats, and river craft as alternative housing options to escape skyrocketing brick-and-mortar rental markets.
Under standard UK tax law, local councils levy council tax on “dwellings,” which are defined as real property listed on local valuation lists compiled by the Valuation Office Agency (VOA).
For a boat to be classified as a domestic dwelling liable for individual council tax, it must generally occupy a “long-term, residential mooring” with dedicated planning permission for permanent habitation.
However, many commercial marinas operate under a composite non-domestic rating system. In these environments, the marina owner pays unified commercial business rates to the local authority for the entire site, and individual boat owners pay a comprehensive mooring or berth fee.
Because these fees frequently cover site maintenance, utility hookups, and waste disposal, many live-aboard boaters operate under the structural assumption that their local public contributions are entirely handled by the commercial landlord.
The ambiguity deepens for “continuous cruisers”—boaters without a permanent home mooring who must move their vessels every 14 days under Canal & River Trust regulations—who are generally exempt from council tax entirely due to their transient status.
The lack of clear, consistent enforcement across different borough boundaries has historically created pockets of administrative confusion, leaving both boaters and local authorities exposed to protracted legal assessments when determining individual primary residency status.
Prediction
The resolution of the GLA ethics investigation and the ongoing local council review will likely have noticeable ripple effects for several specific audiences across London and the wider UK.
This high-profile case is highly likely to prompt local authorities across London—such as Hackney, Tower Hamlets, and Waltham Forest—to launch systematic reviews of the council tax status of local marinas and residential moorings.
For the thousands of Londoners currently living on narrowboats, this development could result in increased scrutiny regarding whether their vessels constitute a “sole or main residence.”
Boaters may face unexpected demands from local town halls to clarify their housing arrangements, potentially leading to retrospective council tax assessments or upward pressure on marina mooring fees if operators adjust their rates to cover reclassified domestic liabilities.
For Unconventional Housing Occupants
Residents engaging in other alternative living arrangements, such as property guardians, lodgers, and those utilizing co-living spaces, will likely see a push toward tighter contractual clarity.
Landlords and management agencies will face pressure to explicitly document exactly how local tax liabilities are distributed within monthly fees to protect vulnerable occupants from sudden legal liabilities.
For the Green Party and Regional Politics
Politically, while the explicit clearance by the GLA monitoring officer successfully insulates Mr Polanski from direct disciplinary sanctions or suspension within City Hall, the narrative of a senior environmental leader inadvertently slipping through a tax net will remain a point of friction.
Political opponents are likely to continue utilizing the incident to challenge the party’s administrative competence. Consequently, the Green Party will likely adopt a highly cautious approach to personal financial disclosures moving forward, emphasizing structural reforms to the UK housing and local tax systems to prevent similar bureaucratic traps from undermining their platform on social responsibility.
