How Tenants Can Query Their Own Waste Charges

Abstract#

A tenant in a multi tenant office building opens its service charge statement and asks what the waste line is based on. This blog tests one question: when a tenant queries its waste charge what evidence can the building produce and does the allocation method decide the answer. It reviews the RICS professional standard on service charges in commercial property (2nd edition effective 31 December 2025) the GRESB 2026 estimation rules, the Better Buildings Partnership Green Lease Toolkit and a published volume to weight study of 2684 office waste bags. It sets those rules against one anonymised London building where 31 occupiers are recharged by verified weight and against platform totals of 949000+ photographed weighings. The finding is that the standard requires managers to give a tenant the basis of its share and the cost totals behind it but requires no measurement of waste. Under floor area apportionment a query therefore ends at a contractor invoice. Under verified weight it ends five steps down in a photograph. In the sample building one occupier produced 26.02% of all waste: about eight times an even share. A floor area answer cannot show that.

Key Findings#

1. The RICS standard Service charges in commercial property (2nd edition effective 31 December 2025) requires managers to give every tenant an apportionment matrix that shows the detailed basis of calculation for each unit. It describes access to copy invoices as best practice. It does not require waste to be measured. A building can comply in full and still be unable to tell a tenant how much waste it produced [2].
2. The same standard calls separate metering or full submetering of utility supplies essential to an apportionment that reflects actual consumption and usage. Waste is a cost driven by consumption with no equivalent provision and floor area remains the most common basis of apportionment [2].
3. Contractor tonnage is usually derived from container volume. A study of 2684 bags across 18 office buildings measured densities from 73 to 172 pounds per cubic yard depending on the stream: a spread of 2.4 to 1 [3]. GRESB does not allow waste data from shared bins to be divided by floor area or equally and requires a full bin assumption where the fill level is unknown [4].
4. In one anonymised London building recharged by verified weight 31 occupiers shared a month of £15122.08 across five cost components. The largest producer generated 26.02% of all building waste against an even share of 3.23%: a ratio of about eight to one [1].
5. Across the platform 949000+ weighings covering 5107000+ kg have been photographed at the moment of disposal: an average record of about 5.4 kg. A query on verified data descends to records of that size. A query on floor area descends to a lease plan and an invoice [1].

1. Introduction#

1.1 The Question#

Utility lines on a commercial service charge are expected to have a meter behind them. The RICS standard calls separate metering of utility supplies essential so that the split between tenants reflects what each actually uses [2]. Waste has no meter. When a tenant asks what its waste charge is based on the answer in a typical multi tenant building is a floor area percentage applied to a contractor invoice. Neither figure describes the waste that the tenant produced.

This blog asks one question. When a tenant queries its waste charge what evidence can the building produce and does the allocation method decide whether the query can be answered. The question can be tested against the rules. If the standard that governs service charges required waste to be measured every tenant would receive the same depth of evidence whatever the allocation method. Section 3 shows that it does not.

1.2 Why This Matters Now#

Three developments have turned the waste line from an occasional query into a recurring one.

First the RICS professional standard Service charges in commercial property took effect in its 2nd edition on 31 December 2025. Its mandatory requirements include an apportionment matrix for every tenant with the budget and the account. They include year end accounts within four months of the service charge year end and recovery of no more than 100% of the proper and actual costs [2]. Every tenant now receives the basis of its waste share in writing. The natural next question is what sits beneath it.

Second service charge costs are rising. The BDO PropCost benchmarking report covers more than £600 million of service charge expenditure across more than 1000 properties. It found that office service charge costs rose by 9% in 2024 after a 15% rise from 2022 to 2023 and that Central London offices carried costs almost 70% higher than offices in the rest of the UK [5]. A line that rises two years running is a line that tenants query.

Third Digital Waste Tracking became mandatory for waste receivers in England and Wales on 1 October 2026. Each load must be reported within two working days with its waste classification codes [6]. The duty falls on the receiver and the record describes the load as it arrives. It is not designed to divide a collection from a shared bin store between the tenants who filled it. Buildings preparing for digital waste tracking for commercial buildings meet the same gap: the regulatory record of waste is now digital but the question a tenant asks about its own share still has to be answered inside the building.

1.3 Scope and Structure#

This blog covers waste costs recovered through the service charge in multi tenant commercial buildings in England. It proceeds in six sections.

• Section 2 Describes the method and the sources.
• Section 3 Sets out four findings.
• Section 4 Discusses what they mean for tenants and building teams.
• Section 5 States the limitations.
• Section 6 Answers the question.

It does not cover lease drafting or the legal remedies open to a tenant. Those depend on the lease and on professional advice.

2. Method#

2.1 Research Design#

The blog combines three evidence streams. The first is a review of the primary rules that govern what a tenant can be given when it queries a service charge. The second is a published benchmark of how waste tonnage is estimated from volume. The third is first party data from the Wastify AI platform that shows what a measured answer contains.

2.2 Sources#

Every external source was opened directly on 5 October 2026 and each reference carries that access date. Secondary summaries were used only to locate primary documents and are not cited.

Table 1: Sources consulted

Source: compiled for this blog from the references listed at the end.

2.3 Platform Data#

Platform figures are of two kinds. The building data describes one anonymised multi tenant office building in London across one month read from the live platform on 16 August 2026. It holds 31 occupiers recharged by verified weight across five cost components and the share of building waste produced by each occupier.

Platform totals were read from the live counter on the Wastify AI homepage on 5 October 2026. The counter showed 5107000+ kg weighed at disposal and 949000+ verified weighings. It showed £650000+ recharged on verified data and 380+ companies reporting through the platform. Public totals are rounded down.

One weighing is one bag or bin placed on a connected scale. It is photographed and attributed to a tenant by PIN entry at the kiosk and coded to a waste stream at the moment of disposal. No building or tenant is identifiable. Buildings on the platform chose to measure their waste and that selection bias is addressed in section 5.

2.4 Calculations#

An even share across 31 occupiers is 100% divided by 31 which gives 3.23%. The ratio of the largest share to an even share is 26.02% divided by 3.23% which gives about 8.1. The average weighing is 5107000 kg divided by 949000 records which gives 5.38 kg and is stated as about 5.4 kg. The density spread is 172 divided by 73 which gives 2.36 and is stated as 2.4 to 1. The overstatement and understatement in section 3.2 are 113 divided by 73 and 113 divided by 172. Component shares in Table 4 are each amount divided by the month total to one decimal place. Every derived figure was recomputed from the stated inputs before publication.

3. Findings#

3.1 What the Standard Gives a Tenant#

The RICS standard sets out a short list of mandatory requirements for service charges in commercial property. Four of them shape what a tenant receives when it queries a waste charge. Table 2 sets them beside four supporting sections of the same standard.

Table 2: What the RICS standard gives a tenant that queries a waste charge

Source: RICS Service charges in commercial property 2nd edition [2].

Read together the provisions give a tenant the rule and the cost. They do not give it the quantity. Nothing in Table 2 requires anyone to know how much waste a tenant produced. A manager can issue a compliant matrix and compliant accounts and supply every invoice while the building holds no record of the waste of any occupier.

Section 3.2 tests the basis of apportionment against the availability and benefit and use of services. Section 4.2.5 records that apportionment based on floor area is the most common and often the simplest method [2]. Floor area measures availability. It does not measure use.

3.1.1 Metering Is Essential for Utilities but Absent for Waste#

The standard already accepts that a cost driven by consumption needs a meter. Section 4.1.6 treats separate metering or full submetering of utility supplies as essential to an apportionment of cost between tenants that reflects actual consumption and usage [2]. Waste behaves like a utility. Its quantity follows what a tenant does rather than the space it leases. Yet no equivalent provision asks for it to be measured. A tenant querying its electricity can be shown a submeter. A tenant querying its waste is usually shown a lease plan.

3.2 Where the Invoice Tonnage Comes From#

The total on the invoice is the second input to every waste charge. Collections are commonly priced per lift or per container. Where a tonnage is reported it is usually derived rather than weighed. GRESB describes the permitted method: count the bins and record their volume and their fill level and the frequency of collection. Where the fill level is unknown the participant must assume every bin was full at every collection [4]. GRESB does not prescribe the conversion from volume to weight.

That conversion is where the estimate is weakest. Great Forest weighed 2684 bags of waste across 18 office buildings and measured the density of each stream [3].

Table 3: Measured densities of office waste streams

Source: Great Forest volume to weight study covering 2684 bags across 18 buildings [3]. Ratios computed for this blog.

The study concluded that commonly used conversion rates may not be accurate and create unreliable waste data [3]. The spread is 2.4 to 1 between streams in the same type of building. If the commingled figure of 113 were applied to a container of dry office waste the tonnage would be overstated by 55%. Applied to a container of mixed paper it would be understated by 34%. A tenant that queries its charge on a floor area basis is querying a share of a total that may itself rest on a density nobody measured.

3.3 What a Floor Area Answer Cannot Show#

The third finding comes from one building that recharges by verified weight. In the month read from the platform 31 occupiers shared waste costs of £15122.08 across five components [1].

Table 4: One building month allocated by verified weight

Source: Wastify AI platform data for one anonymised building with 31 occupiers read on 16 August 2026 [1]. Shares computed to one decimal place.

Each component was allocated across the 31 occupiers by verified share. By stream general waste carried 32.95% of the recharge and mixed recycling 25.47%. Food waste carried 10.61% and paper hand towels 8.39%. Confidential paper carried 7.51% and coffee grounds 5.63% and glass 5.03% with the remaining 4.41% across other streams. By outcome 56.44% of the recharged waste was recycled and 32.95% recovered with 10.61% sent to anaerobic digestion [1].

The figure a floor area basis cannot reveal is the spread. The largest producer generated 26.02% of all building waste. An even split across 31 occupiers would give each 3.23%. The largest producer therefore generated about eight times an even share. Floor area records how much space each occupier leases. It holds no information about which occupier filled the bins. Whatever the lease areas are the output of that occupier is invisible to an area basis and so is the output of every other occupier.

On verified data the heaviest producer that queries its charge is shown its own weighings. So is the lightest.

3.4 How Far Down a Query Can Go#

A tenant query looks like one question. In practice it is six. Table 5 sets each one beside the evidence available under each basis.

Table 5: The questions inside a tenant waste query and the evidence available under each basis

Source: RICS standard [2] and GRESB estimation rules [4] for the floor area column. Wastify AI record structure [1] for the verified column.

Under floor area apportionment the first two questions have answers and the next four do not. Under verified weight all six have answers and the last four rest on a measurement of the waste of that tenant.

The verified side is produced at the point of disposal. The waste tracking capture workflow takes four steps per stream on the Wastify Touch kiosk: PIN and tenant and weigh and confirm. One action of the weight based waste cost allocation engine then allocates the month across tenants by verified share and by stream and by disposal outcome. Through tenant recharging statements each company receives its own breakdown and other tenants are anonymised by default [1].

Across the platform 949000+ weighings have been recorded this way covering 5107000+ kg. The average record is about 5.4 kg [1]. A tenant that disputes a monthly charge on verified data is disputing a sum of records of that size and each one carries its own photograph.

3.4.1 One Walk Down From Charge to Photograph#

The waste chain of custody published by Wastify sets out the walk down in five steps. In its worked example the service charge line rests on a recharge run showing 22.4% of building waste by verified weight across five cost components. The share rests on stream totals of 1554.4 kg across six streams net of bin tare. The totals rest on individual weighings such as record 908417: 8.25 kg of coffee grounds weighed on 16 August at 17:00 under EWC 20 01 08. The record rests on a photograph of the bags on the scale at the moment they were weighed [1].

Under floor area apportionment the same walk down has two steps. The line rests on a floor area percentage. The percentage rests on an invoice. Below the invoice there is nothing the building holds.

A waste charge should end at evidence rather than at a percentage. Wastify AI delivers waste intelligence for commercial buildings where every recharge line descends to a weighed and photographed record.

4. Discussion: What This Means for the Reader#

4.1 For Tenants#

The useful test of any answer is where it stops. A tenant can ask the six questions in Table 5 in order and note the last one that receives a document. If the answer stops at the matrix and the invoice the charge may be fully compliant with the standard and still not be evidenced. That is not a failing of the manager. It is a limit of the data the building holds.

Arithmetic is the one challenge the standard already recognises. Requirement 7 notes that withholding a difference arising from a mathematical or computational error may not be considered unreasonable [2]. On a floor area basis the arithmetic is a percentage of a total. On verified data a tenant can rebuild its own charge from its own weighings.

Tenants with their own sustainability targets need the same records for a second purpose. Measured weights by stream and by outcome feed ESG waste reporting in a way that a floor area share of a contractor total cannot. The Better Buildings Partnership green lease clause on data sharing provides that each party must share the energy and water and waste data it holds relating to the premises on a regular basis and not less frequently than an agreed monthly or quarterly or annual interval [7]. The clause can only pass on data that exists. A building that weighs at disposal holds it. A building that does not holds an invoice.

4.2 For Property Managers and Landlords#

Section 3.2 of the standard asks for an apportionment that is demonstrably fair and reasonable and that reflects the availability and benefit and use of services [2]. For waste the word that matters is demonstrably. GRESB gives its reason for refusing to divide shared bin data between assets by floor area or equally: there is no certainty that waste generation correlates with area [4]. The rule was written for assets that share bins. Its reasoning applies with equal force to occupiers that share a bin store inside one building. In the sample building the spread between the largest share and an even share was about eight to one [1].

A fair split of a wrong total is still a wrong bill. The query a manager can close fastest is one where the total has been checked as well. With contractor invoice verification each bin is weighed before it leaves the building so the invoice can be checked against what actually left before any cost is allocated. Fair tenant waste recharging then rests on two measurements rather than two estimates.

4.3 The Record Cannot Be Rebuilt Later#

Year end accounts arrive within four months of the year end [2]. The waste behind them was thrown away during the year. A bag that left the building unweighed and unattributed cannot be weighed afterwards. Every query about that period will end at the invoice however well the matrix is drafted. The evidence a tenant will ask for next year is created in the waste room this year or not at all.

5. Limitations#

This blog has five limitations that a careful reader should weigh.

1. The building data describes one building in one month. Buildings on the platform chose to measure their waste which is a selection bias. The share of 26.02% describes that building and should not be generalised.
2. The comparison with an even share of 3.23% is not a comparison with the floor area shares of the building which are not published. It shows the spread of waste generation. It does not measure the size of any overcharge or undercharge under a floor area basis.
3. The density study was carried out in New York office buildings in 2013. Stream composition in UK buildings differs. The study is used to show that density varies by stream and not to supply UK conversion factors.
4. The walk down in section 3.4.1 is the worked example published on the Wastify website. It illustrates the structure of a record and is not part of the building month in Table 4. Platform totals are rounded down so the average weighing of about 5.4 kg is approximate.
5. This blog is not legal advice. What a tenant can require depends on its lease and on how its manager applies the RICS standard. Section 4.3.1 describes access to copy invoices as best practice rather than as a mandatory requirement.

6. Conclusion#

A tenant can always query its waste charge. Under the RICS standard its manager must give it the basis of its share and the totals behind it on a fixed timetable. Whether the tenant can see its waste depends on one thing: whether the building weighed that waste at disposal. Under floor area apportionment the query ends at a contractor invoice that may rest on volume and an assumed density. Under verified weight it ends five steps down in a photograph. The allocation method decides the answer.

A building that wants to know where its own answer stops can check its waste data in a two minute self assessment before the next service charge year begins.

Give every occupier a waste charge it can check down to the photograph. Book a demo with Wastify AI for a one hour session tailored to your buildings.

Frequently Asked Questions#

Can a tenant formally query a waste service charge?#

Yes. The RICS standard requires managers to give every tenant an apportionment matrix that shows the detailed basis of calculation. It describes access to copy invoices as best practice. Tenants are not generally entitled to withhold payment but withholding a difference that arises from a computational error may not be unreasonable [2]. The lease sets the detail.

What does the apportionment matrix show for waste?#

It shows the basis of calculation and the total apportionment per schedule for each unit. For waste it shows the rule used to set a share. It does not show how much waste a tenant produced unless the building measured it.

Why is floor area hard to defend for waste costs?#

Floor area measures space and waste follows activity. GRESB refuses to divide shared bin data by floor area because there is no certainty that waste correlates with area [4]. In one building on verified data the largest producer generated 26.02% of all waste against an even share of 3.23% [1].

How reliable is the tonnage on a contractor invoice?#

Often it is derived from container volume. One study of 2684 office waste bags measured densities from 73 to 172 pounds per cubic yard depending on the stream [3]. A single conversion factor cannot be right for every container.

What does a verified waste record contain?#

The tenant and the stream with its EWC code. The net weight after the tare of the bin type. The kiosk and the time. A photograph taken as the weight is read. Each record sits in one of the EWC coded waste streams configured for the building.

Can a tenant see the waste data of other tenants?#

Tenants see their own data. Other tenants are anonymised by default and any wider comparison is a choice for the building manager [1].

How quickly can a query be answered on verified data?#

The records already exist so nothing has to be rebuilt from invoices. Living AI answers plain English questions about the records with the sources attached. Which streams drove our charge in July is a question it can answer from the weighings themselves.

Does Digital Waste Tracking give a tenant its own waste data?#

No. The duty falls on the receiver and each record describes a load as it arrives [6]. A collection from a shared bin store is one load. Dividing it between tenants still depends on records made inside the building.

References#

[1] Wastify AI platform data. One anonymised multi tenant office building in London across one month read from the live platform on 16 August 2026: 31 occupiers and five cost components totalling £15122.08 with a largest producer share of 26.02%. Platform totals of 5107000+ kg weighed and 949000+ verified weighings and £650000+ recharged for 380+ companies read from the live homepage counter on 5 October 2026. Record structure and the chain of custody walk down as published on the Wastify website. wastify.co.uk.

[2] RICS. Service charges in commercial property. Professional standard UK 2nd edition. Published June 2025 and effective 31 December 2025. Mandatory requirements 2 3 4 and 7 and sections 3.2 4.1.6 4.2.5 4.3.1 and 4.5.2. rics.org. Accessed 5 October 2026.

[3] Great Forest. Volume to weight conversion ratios for commercial office waste in New York City. White paper 2013 covering 2684 bags across 18 buildings. greatforest.com. Accessed 5 October 2026.

[4] GRESB. Data estimation rules. 2026 Real Estate Assessment. guides.gresb.com. Accessed 5 October 2026.

[5] BDO. Office service charges rise by 9% as firms invest to lure people back to the office. PropCost benchmarking report release. Published 23 September 2025. bdo.co.uk. Accessed 5 October 2026.

[6] GOV.UK. Digital waste tracking: check if you need to report the waste you receive. Mandatory for receivers in England and Wales from 1 October 2026 with records within two working days. gov.uk. Accessed 5 October 2026.

[7] Better Buildings Partnership. Green Lease Toolkit: Data Sharing. betterbuildingspartnership.co.uk. Accessed 5 October 2026.