The Turkish owners of a home on 'England's prettiest street' face having to tear down a 'huge' outdoor fireplace that they built without permission.Metin Dener and his wife Gulbin have been locked in a long-running row with their neighbours in the Cotswold village of Bibury after carrying out a string of controversial renovations.Locals blame the works for turning the Grade-II listed property into a 'monstrosity' and spoiling the atmosphere of Awkward Hill, which merges onto the world-famous Arlington Row.An underground garage is currently under construction, while the couple have also tried to build an oak conservatory and stone summer house.Villagers have been left in despair at the 'endless' works. But they have now won a major victory after Cotswold District Council refused to grant permission for the latest tranche of development.The Deners went ahead with building an outdoor fireplace with a large chimney before lodging a retrospective planning application.But this has been refused by the council, who found it would damage the 'heritage character' of Arlington Row and the surrounding area.This raises the prospect the fireplace and chimney will be pulled down, although the couple could still appeal. The wealthy Turkish homeowners Metin and Gulbin Dener have been scolded for unauthorised works at their £1.1million cottage on Britain's 'prettiest street' and face having to tear them down. Here, they are pictured at the Savoy in London in 2017 'Horrified villagers said the works have turned the idyllic village into 'sheer hell' and the cottage itself a 'monstrosity'. Construction work at the site is pictured The couple owns a Grade-II listed property on a street filled with chocolate-box cottages where average house prices sit at £1.5million. The quaint village of Bibury is picturedIn its report, the council planning department described the additions as 'visually intrusive, uncharacteristic and overly engineered'.It continued: 'The works would erode the rural and historic character of the site and the development would fail to preserve the significance and settings of designated heritage assets, including the Grade II listed Rosemary Cottage, the setting of the Grade I listed Arlington Row, and the character and appearance of the Bibury Conservation Area.'The harm identified would be less than substantial; however, great weight must be given to the conservation of designated heritage assets.'The proposal would provide private domestic benefits to the occupiers of the dwelling, but very limited public benefits, and those are considered insufficient to outweigh the heritage harm.'The decision not to grant retrospective planning permission will be welcomed by Bibury Parish Council, which described the fireplace as 'huge' and 'not in keeping with the surroundings'.Bibury residents have been complaining about the well-heeled Turkish couple since 2023, blaming them for bringing constant noise and disruption to their usually quiet village.In April this year, the couple - who say they 'love' the Cotswolds - hit back at claims they had 'overdeveloped' their home.A representative said: 'All the previously approved and underway works have currently only resulted in a 1.2sqm increase to the footprint of the residential property and the replacement of an existing above-ground garage with an underground garage. A woman is seen collecting water from a trout stream in front of a picturesque row of gabled cottages at Bibury on December 11, 1947 The cottages (seen in 1901) were converted into dwellings in the early 17th century from a monastic sheephouse dating at around 1380 Gulbin is seen posing in front of the homes on what is considered Britain's prettiest street, years before the cottage's purchase'All other works have been repairs to existing retaining walls and landscape works related to the removal and repair of failing walls on site. It is certainly not the case that the site has been 'overdeveloped'.'They added that much of the last three years of construction was centred around 'considerable works to the mains drainage', causing road closures which had caused local inconvenience and disturbance.'Due to the narrow access road and high level of tourists in the village the works on this site have had to progress at a slow pace as vehicle access has been relatively limited compared to most building sites and works on a steeply sloping site are complex,' they said.'The contractors on this site have tried to inform residents of deliveries and material removals where possible, however communication has not always been possible to be maintained. Many local residents said they were 'horrified' by the damage that has been done A 'bizarre' palm tree was also added to the front garden – covered in Christmas decorations Gulbin posing in front of the homes with her small dog The couple hit back at criticism by locals. with their representative saying: 'It is certainly not the case that the site has been "overdeveloped"''The client and contractors understand this causes frustration however how construction is undertaken is not something that is under the control of the current planning system.'Other planning applications resisted by locals included proposals of stripping and replacing traditional Cotswold stone slate roof tiles, as well as adding insulation to a utility room.Two palm trees were also added to the front garden – festooned with fairy lights.Perhaps the most notable application included a request to build an underground car park - on a street filled with historic gabled cottages that were converted into homes for weavers in the 17th century from a monastic sheephouse, dating to around 1380.Even tourists, who flock to picturesque Bibury from India, Japan and China, believe the renovation is 'ruining' the picturesque street.The Deners bought the cottage for £1.1million in 2022 and works have been ongoing since 2023.Photos posted by Mrs Dener on social media show the pair enjoying time in the quaint village years prior to purchasing the cottage.She can be seen posing on several occasions in front of Arlington Row, which is widely considered the 'prettiest street in England'.In one Facebook post, she says to a friend: 'I can't tell you how much I love this place.'In a picture from 2017, Mrs Dener - who comes from the Turkish city of Izmir - is seen smiling outside a cottage while walking her dog, while another snap shows her walking down a street in the village with a heart-shaped umbrella.Photos also show her husband on country walks in the Cotswolds with their dog sat in a holdall on his back.The couple also enjoy spending time in London, where they have visited high-end locations including the Aqua Shard.In another photo, Mr Dener, sporting a sleek black suit, sits beside his wife, dressed in a white dress and laced pillbox hat, at London's five-star Savoy Hotel.Shortly after the purchase of their Grade-II listed cottage in 2022, renovation works began.They remain ongoing to this day – as do complaints from neighbours who say they have made their lives an 'absolute nightmare' and turned Bibury into a 'warzone'.