Pricing environmental externality in housing sector: a review of court cases in United Kingdom Rita Yi Man Li, Department of Economics and Finance, Hong Kong Shue Yan University, Hong Kong, ritarec1@yahoo.com.hk / ymli@hksyu.edu Yi Lut Li, School of Law, City University of Hong Kong, lliyilut@yahoo.com.hk Abstract Air pollution, noise pollution and water seepage are some of the major environmental externalities which adversely affect our residential environment. Previous research reveals that property values drop when there are negative environmental externalities nearby. In 1960, Ronald Coase suggested that there are many methods to solve the problem of externalities apart from imposing Pigovian tax, internalization is one of those noted in the Problem of Social Costs. In tort, the internalization of externalities is achieved via litigation. This paper studies the residents’ possibility of getting their compensation from pollutant generator via litigation in court. Keywords: externalities, nuisance, United Kingdom 1. Introduction The classical approach to externality pricing can be dated back to Pigou (1920): one charges agents for the exteralities so that the efficient state can be created; renders this state an equilibrium (Sandholm, 2005). Coase (1960) suggested that well-defined property rights over the source of those who had been affected with a good regulation environment, the environmental externalities problem can be reduced by market force. Later, Dales also showed how the introduction of transferable property rights could promote environmental protection at lower cost than conventional standards in 1968. Corrective taxes and transferable property rights has developed. Due to the paucity of actual experiences with incentive-based environmental mechanisms, until very recently, most analyses focus on theory or on related simulations. With an increasing use by governments of fees as well as tradeable permits to control pollution, this began to change in the 1980's. Environmental taxes and marketable permits appear in the policy arena. Examples include the introduction of marketable permits in the U.S. to lower the lead content in gasoline; limit the use and production of chlorofluorocarbons and sulfur dioxide emissions (Hahn and Stavins, 1992). Applying Coase’s idea, Brechet and Picard (2010) propose the usage of noise licenses as the means of the negotiation between airline companies and residents. The rationale is “to compensate the residents for noise damage, the property rights will be assigned to 1 them.” By selling the rights in market, the residents express their willingness to accept noise in return for monetary compensation. 2. Environmental externalities Conceptually, the externalities problem is quite simple. In the following figure, the marginal production cost of a good perceived by the project entity is noted as MPC. Suppose that the production process produces a negative externality, for instance, it emits soot which increases the maintenance costs of buildings nearby. Therefore, the marginal social cost (MSC) is higher than the marginal production costs (as the production process also produces an externality) and is given by the line MSC. Up to any given level of output Q*, the total cost of production at one particular level of output is given by the area under the curve. The difference between the areas under the two curves gives the divergence between the private and the social costs. Nevertheless, as the financial costs of the project does not include the externality costs; an evaluation of the project based on MPC will underestimate the social costs of the whole project and overstate the net benefits (World Bank, 1998). Figure 1 Divergence between social and private costs (World Bank, 1998). The abovementioned situation poses another problem, i.e. if producer A bears only a fraction of the costs, he tends to produce a larger quantity of that good than those who 2 need to bear the full costs of his action imposes on B (the one who suffer). Furthermore, if the transactions costs between the two parties were low enough, B can pay A a sum of money to change those activities which could leave both parties better off (Epstein, 1993). 3. Housing values and environmental externalities Many previous studies focus on how various factors affect the price of properties, environmental externalities are common in property price research arena (Hui et al., 2006). In a research which was performed by Jim and Chen (2007), environmental quality was rated the first most important criteria in home purchase decision. The concern of pollution and its harmful effects on health are the major reason for such criteria selection. Research shows that places with less noise pollution are preferable and there is a significant negative relationship between airport noise and property prices. Results are similar in case of traffic noise, for example, residents in Chicago were willing to pay more to reduce the exposure to the pollution of particulate matter and sulphur dioxide, i.e., people prefer to live in a place with fresher air despite the higher cost (Hui et al., 2006). Similarly, area with less air pollution can command a higher selling price (Li et al., 2007). In view of the possible reduction in housing prices/value due to environmental externalities, Rosen (1974) attempted to use hedonic pricing model to estimate the reduction in housing price. Slowly, all the related research on reduction in housing price due to air pollution were studied base on the same model (Table 2) On the other hand, DiPasquale & Wheaton point out that the housing market may need years to adjust fully to an exogenous shock (Wilhelmsson, 2000). Types of noise pollution Author Traffic noise Traffic noise Traffic noise Luttik (2000), Pennington et al. (1990) Taylor et al. (1982) Highway noise Highway noise Nelson (1982) Gamble et al.(1974) Airport noise Airport noise Airport noise Cohen and Coughlin (2007) Baranzini and Jos (2005) Jon (2004) % decrease in price of properties -5% -6% $312 per decibel in highway areas and $254 in arterial sites -8 to -10% Dollar per decibel rate range from $60 to $646 -20.8% -1% In the U.S., the discount in property value is about 0.5% to 0.6% per decibel at noise exposure levels of 75 dB or less. In Canada, there is a drop in 0.8 % to 0.9% in property value per decibel. Table 1 The effect of noise pollution on housing price reduction 3 Types of air pollutants Author Effects of air pollution on property prices /rent Significance the 0.05 level C6H6 Amrusch 2005 Negative Yes RSPM Gulati and Murty 2004 Negative Yes SOx Nourse 1967 Henning and Ridker 1967 Negative Yes SOx Chattopadhyay 1999 Negative No SOx Li 1980; Banerjee, et al. 2004 Positive No Visibility Murdoch and Thayer 1988; Graves, et al. 1988; Negative Yes NOx Banerjee, et al. 20041 Uncertain Uncertain NOx Harrison and Rubinfield Nelson, et al. 1992 Negative Yes Ozone Albers, et al. 1992 Negative Yes Positive Negative -Yes Negative No Ozone Dust/Particul ates Particulates 2 1978; Murdoch and Thayer 1988 Deyak and Smith 1974; Fernando Anderson and Crocker 1971; Clark and Nieves 19943 Deyak and Smith 1975 at Table 2 Effects of air pollution on property prices (Li et al., 2007) Similar research results can also be found in case of flooding. Previous investigation suggests that price of house located in flooding zone command a lower price than those do not. Furthermore, insurance premium may not be able to cover such cost (Harrison et al., 2001). Nevertheless, another study yields an opposite findings, sales prices after the 1974 flood in both the high- and low-risk flooding areas were significantly higher than sales prices before the flood. The differences in flood 1 Two out of the four models were positive, while one of these was significantly different from zero at the 5% level. Among the two negative models, one was significantly different from zero at the 1% level. 2 The authors dropped such results because nitrogen dioxide was always positive. 3 All except the model in Superfund sites were statistically significant. 4 experience did not adversely affect both the actual and perceived long-term property values (Babcock and Mitchell, 2007). 4. Reactions to environmental externalities There is a range of the positive reactions of proprietors to an environmental nuisance in a residential neighbourhood. They are: (a) Voting in the political market for a change in policy through a change in politicians; (b) Coasian bargaining with the polluter; (b) “voting with one’s dollars”, selling the land interest and go, a market solution with entry and exit; (c) making public complaints, in the hope of helpful administrative feedback; and (d) bringing the matter to court.”(Li et al., 2007) Plaintiff in United Kingdom may rely on “nuisance” to seek for air pollution compensation in court (Westlands Estates Limited and Egremont Estates Limited v Swilynn (HK) Limited [1985]). Nuisance, according to the learned judge in Born Chief Co. (, can be defined as “an act of omission which is an interference with, disturbance of or annoyance to, a person in the exercise or enjoyment of his occupation of land or of some right used or enjoyed in connection with land”. Trading as Beijing Restaurant v George Tsai and Another [1996] The learned judge in Transco plc (formerly BG plc and BG Transco plc) (Appellants) v Stockport Metropolitan Borough Council (Respondents) concurs that the tort of nuisance may comprise a variety of situations. Of which nuisance by interference with a neighbour's quiet enjoyment of his land is identified as one of the possible grounds. Concerning air pollution nuisance proble, Teng Fuh Co Ltd v Air pollution Board and another [2001] identifies that not just those air pollutants emissions such as sulphur oxides are classified as air pollution, bad smell can also be one of them: 5 “air pollutants…refers to 'any solid, particulate, liquid, vapour, objectionable odour or gaseous substance emitted into the atmosphere'. Smells that are objectionable may therefore constitute air pollutants.” Concerning water seepage, Articles 640 and 641 of the Civil Code (which are part of Book II, Title IV dealing with servitudes) states that "640. Lower tenements are subjected to those which are higher, to receive waters which flow naturally from them without the hand of man having contributed thereto. A lower owner may not raise dams which prevent that flow. An upper owner may not do anything that worsens the servitude of the lower tenement. 641. An owner has the right to use and dispose of rainwater which falls on his tenement. Where the use of those waters or the course given to them worsens the natural servitude of flow established by Article 640, a compensation is due to the owner of the lower tenement." Therefore, when water flows down naturally from one landowner's land to lower land owned by the other, the latter does not have any grounds for legal complaint. But as soon as the owner of the higher land alters the position by building works or civil engineering works which change the flow, there is possibility of a claim. Whether the upper owner is liable depends on the degree to which the burden on the lower land is raised (Daby v State of Mauritius (Mauritius) [2008] UKPC 45) Furthermore, one can refer to the relevant in seeking for compensation. The Water Industry 1991 Act, for example, explicitly spells out the duties and powers of water and sewerage undertakers. The exercise of these functions is subject to control and supervision by the Director General of Water Services (Marcic v. Thames Water Utilities Limited). Residents can also seek compensation for flooding via the relevant Sewerage Act. 5. Case studies in United Kingdom To know more about the compensation which closes the gap of private production costs and social costs in litigation within the residential area, the authors use the keyword search “nuisance” in British and Irish Legal Information Institute database. While previous studies on the “costs” of externalities mostly based on hedonic pricing model analysis on the extent of fall in residential price, what it intends to study now 6 also relate to “costs” that relate to some external parties’ behavior causes nuisance who live in the residential units but based on court cases. Similar to the cases in Hong Kong, the number of cases available is limited. Nevertheless, despite its small in number, it provides useful insight on how the court deals with these environmental externalities problem. 5.1 Noise Aircraft noise, highway and neighbourhood noise are some of the common environmental externalities. There were three cases in the database only. 2 out of three fail to get any compensation. The difficulty in getting compensation may be a vivid explanation in why few people sought litigation as a method of conflict settlement. 5.1.1 Aircraft noise In Robertson & Ors v Manchester Airport plc [2010], Mr Adrian Robertson and Mrs Kathleen Robertson (first claimants) and Mr Andrew Spark and Mrs Annette Spark (second claimants), heard together, are in respect of claims for compensation made under Part I of the Land Compensation Act 1973. They sue The Manchester Airport Plc under the 1973 Act for compensation due to the depreciation in the value of the claimants’ interests because of the second runway 2 (R2) at Manchester Airport. After considering the professional valuers’ reports, the learned judge decided that the Airport side has to pay (i) Mr and Mrs Spark (Burnside): £40,000 (for the depreciation of 7.8%) and (ii) Mr and Mrs Robertson (Smith Lane Farm): £72,500 (for the lowering in home value of 10%). 5.1.2 Highway noise In Thomas & Ors v Bridgend County Borough Council (2010) depreciation in value of interest in land caused by the use of a highway. The claimants allege that the values of their homes have been diminished as a result of noise and other nuisance caused by use of the road. They wish to claim compensation from the council under the Land Compensation Act 1973 (the Act) but section 19(3) bars such a claim where, the road is not adopted within 3 years of first being open to public traffic. The claimants argue that the subsection amounts to a statutory bar on their right to compensation and as such is incompatible with their rights under article 1 of the First Protocol to and/or article 6 of the European Convention of Human Rights. The former provides that every person is entitled to the peaceful enjoyment of his possessions. The judge decided that section 19(3) of the Act is not incompatible with the rights under article 6 of the claimants in this case. 7 5.1.3 Neighborhood noise In 1999, London Borough of Southwark and Another v. Mills and Others Baxter v. Mayor etc of the London Borough of Camden, Mrs. Tracey Tanner and Miss Yvonne Baxter are the tenants of the London Boroughs of Southwark and Camden. They complain of being able to hear all the sounds made by their neighbors (they are not unreasonably noisy). Nevertheless, the problem is the flats have no sound insulation. Therefore, tenants can hear the neighbours' televisions, babies crying, quarrels, coming and going, cooking and cleaning and love-making. The lack of privacy causes tension and distress. Mrs. Tanner and some other tenants commenced arbitration proceedings against Southwark Council based on the terms of their tenancy agreement. The Arbitration Tribunal made an award ordering the Council to install soundproofing under section 1(2) of the Arbitration Act 1979. Whilst modern building regulations require proper sound insulation to be installed, this is often lacking in older buildings. The law, however, has been settled that no implied covenant on the part of the landlord of a dwelling house that the premises are fit for human habitation, let alone that they are soundproof. Noise committed by the others leading to the breach of covenant by the landlord (defendants) in providing tenants with a quite environment was dismissed finally in this case because: "It seems to me impossible to hold that the landlord can be liable in nuisance for conduct which is not a nuisance on the part of the tenant…It is too costly for every landlords of old buildings to upgrade their properties…These cases raise issues of priority in the allocation of resources. Such issues must be resolved by the democratic process, national and local. The judges are not equipped to resolve them…The landlord is obliged only to restore the house to its previous good condition. He does not have to make it a better house than it originally was” In 2001, Baxter v Camden [2001] shared similar problem when the plaintiff was trying to look for compensation. The judge at that time came into similar conclusion and the plaintiff failed to receive any compensation. 5.2 Water externalities 5.2.1 sewer flooding In the U.K., sewer flooding is a nationwide environmental problem, arising from the construction of ever more houses to meet the housing need. Sewers and drains when 8 laid in the 19th century or later which was originally sufficient, can no longer satisfied with the needs of the volume of surface water entering into the public drainage system during heavy rain, causing misery for the people who live there. There are 6,000 properties in the U.K. suffer sewer flooding each year. The water floods into the buildings and houses. Half of these incidents are 'one-off' causes due to blockage or other failure in the sewage system, others occur because of overloaded sewers. Approximately 15,000 properties are at risk of internal sewer flooding at least once every decade. Around 15,000 to20,000 properties are affected by external sewer flooding (Marcic (Respondent) v. Thames Water Utilities Limited (Appellants) 2003). In Marcic v. Thames Water Utilities Limited [2003], Peter Marcic endured serious and repeated external sewer flooding arising from overloaded sewers. They are part of the public sewerage system laid probably in the 1930s. The surface water sewer was constructed up to the standard then. Because of subsequent construction, however, water sewer becomes overloaded. Finally, Thames Water agreed that it would carry out remedy works began in April 2003 and completed in late June 2003 at a cost of £731,000. In Transco plc (formerly BG plc and BG Transco plc) (Appellants) v Stockport Metropolitan Borough Council (Respondents) [2003], The leak was first discovered on 24 September 1992, when the well of the lift shaft at Hollow End Towers was found to be flooded. The fracture was found and repaired quickly. The cost of the works required to restore support and cover the pipe was £93,681. Transco sued the council to recover the cost of repair. Transco's main claim was that the council was liable without proof of negligence under the rule in Rylands v Fletcher (1868). Yet, the appeal was dismissed. One of the learned judge held that Property insurance is relatively cheap and accessible; in his opinion people should be encouraged to insure their own property instead finding opportunity to transfer the risk to others via litigation, where heavy transactional costs involve. In RHM Bakeries (Scotland) Ltd v Strathclude Regional Council [1985], a sewer in the occupation and control of the defender had collapsed, flooding of their premises occurred. The said sewer did not effectively drain the street. The pursuers claim reparation from the defenders for the sustained damage of £10,250 as the defenders' failure in duties to them based on the three aspects: (1) Nuisance at common law, 9 (2) Breach of the defenders' statutory duty under section 2 of the Sewerage (Scotland) Act 1968, and (3) Compensation under section 20 of the said Act. The judge agrees that with the pursuers’ claim of £10,250. In Ritoodoise Daby v. The State of Mauritius Respondent [2008], there was a claim for very large damages for loss as a result of the construction of a trunk road by the Ministry of Works of Mauritius. In this case, the appellant put forward a case which both the Court of Civil Appeal and the judge regarded as exaggerated. He initially claimed damages for nearly twenty times what he had received for the land 135,000 in compensation for the compulsory acquisition (for the construction of the truck road and other work included drainage). He sought to revise his claim to nearly fifty times of that sum based on an estimation of using 300,000 cu ft of topsoil for land reinstatement. Nevertheless, the appellant failed to seek for the aforesaid money as compensation as the judge found that the case was based on incorrect factual assertions: the existence of natural watercourses had been repeatedly denied. Besides, the filling-in of an artificial canal, a notion shown to be physically impossible, was repeatedly asserted. In case of water related nuisance, majority of cases in United Kingdom rest on flooding and the related public works. This is in sharp contrast to cases in Hong Kong where majority are water seepage cases. Further, despite the fact there are 15000-20000 properties which suffered from flooding in Hong Kong cases finally ended up in court are rare. While the sufferer can obtain repairmen in Marcic v. Thames Water Utilities Limited [2003], in Transco case, the judge explicitly stated that “property insurance is relatively cheap and accessible” so that the application for compensation failed and that the previous compensation. The only case which the claimant succeeded was £10,250. This sum of money, however, is very little in view of the heavy costs of lawyer and legal proceeding costs. All these explain why there were a few cases in spite of the large number of properties suffer in the U.K. 5.3 Others (Air and noise) In Allen v Gulf Oil Refining Ltd, the appellants have installed this refinery on land immediately adjoining the village and extending over more than 400 acr. It is alleged by the plaintiff that the operation of the refinery causes a nuisance of bad smell, noise and vibration. Since it could not be prevented by the use of due diligence, it was held that the polluter were not liable for the said nuisance. 10 6. Conclusion Environmental externalities which include noise, air and flooding adversely affect the everyday life of the occupants. Previous research shows that the value of these affected property drops. Yet, seeking compensation from the court is not easy. Many of these fail. The few lucky and rare cases, however, may only be able to seek for a small amount as compensation. Under common law regime where judge made law is an important source of reference, there is no doubt as to where we can only observe a few cases in the database over the past few decades. Summary of the court cases are shown in the following Table. 11 Type of nuisance, case number and date Plaintiff and defendants Noise [2010] UKUT 370 (LC) 7-10 Sept Court case detail background Results Robertson & Ors v Manchester Airport plc Mr Adrian Robertson and Mrs Kathleen Robertson (first claimants) and Mr Andrew Spark and Mrs Annette Spark (second claimants), claims for compensation made under Part I of the Land Compensation Act 1973 for compensation due to the depreciation in the value of the claimants’ interests because of the second runway 2 (R2) at Manchester Airport. The Airport side has to pay (i) Mr and Mrs Spark (Burnside): £40,000 (for the depreciation of 7.8%) and (ii) Mr and Mrs Robertson (Smith Lane Farm): £72,500 (for the lowering in home value of 10%). Noise [2010] UKUT 268 (LC) 12-Jul Thomas Ors Bridgend County Borough Council & v The claimants allege that the values of their homes have been diminished as a result of noise and other nuisance caused by use of the road. They wish to claim compensation from the council under the Land Compensation Act 1973 (the Act) but section 19(3) bars such a claim where, the road is not adopted within 3 years of first being open to public traffic. The claimants argue that the subsection amounts to a statutory bar on their right according to Human Rights. The judge decided that section 19(3) of the Act is not incompatible with the rights under article 6 of the claimants in this case and the claims were failed. Noise [2001] 1 AC 1 Baxter Camden v The tenant complaint that she suffered from noise generated by her neighbor because of poor insulation. It was dismissed because it was the state when the residential unit was let to the tenant. Noise [1999] 4 All ER 449; [1999] 3 WLR 939 21-Oct London Borough of Southwark and Another v. Mills and Others Baxter v. Mayor etc of the London Borough of Camden The plaintiff sued the landlord because noise comitted by the others leading to the breach of covenant by the landlord in providing tenants with a quite enviroment The case was dismiised because it is “…impossible to hold that the landlord can be liable in nuisance for conduct which is not a nuisance on the part of the tenant… It is too costly for every landlords of old buildings to upgrade their properties. "These cases raise issues of priority in the allocation of resources. Such issues must be resolved by the democratic process, national and local. The judges are not equipped to resolve them." 12 Type of nuisance, case number and date Plaintiff and defendants Water [2008] UKPC 45 Water [2003] UKHL 66 4 Dec Water [2003] UKHL 61 19 Nov Water [1985] UKHL 9 24 Jan Others [1981] AC 1001 29 Jan Court case detail background Results Ritoodoise Daby Appellant v. The State of Mauritius Respondent Marcic (Respondent) v. Thames Water Utilities Limited (Appellants) Transco plc (formerly BG plc and BG Transco plc) (Appellants) v Stockport Metropolitan Borough Council (Respondents) RHM Bakeries (Scotland) Ltd v Strathclude Regional Council The appellant's (original defendant) construction leading to the outflow of water to claimant's ground. Defendants had already paid compensation to achieve the compulsory acquistion of plaintiff's land and no more compensation for the problem concerned would be grounded. Serious and repeated external sewer flooding arising from overloaded sewers occur. They are part of the public sewerage system laid probably in the 1930s. The surface water sewer was constructed up to the standard then. Because of subsequent construction, however, water sewer becomes overloaded. Thames Water agreed that it would carry out remedy works began in April 2003 and completed in late June 2003 at a cost of £731,000. The leak was first discovered when the well of the lift shaft at Hollow End Towers was found to be flooded. The fracture was found and repaired quickly. The cost of the works required to restore support and cover the pipe was £93,681. Transco sued the council to recover the cost of repair. The appeal was dismissed. One of the learned judge held that Property insurance is relatively cheap and accessible; in his opinion people should be encouraged to insure their own property instead finding opportunity to transfer the risk to others via litigation, where heavy transactional costs involve. 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