Japanese knotweed is known to exploit structural weaknesses, which is why the guidance also lists drains, or buried services (such as gas pipes) as being at risk. Scientific Name: Polygonum cuspidatum . We got a mortgage and everything was OK. We are now looking at selling our property, and discovered that the knotweed has spread from the adjacent land into our property. Category: Descriptors: 4: Japanese Knotweed is within 7 metres of a habitable space*, conservatory and/or garage, either within the boundaries of this property or in a neighbouring property or space; and/or. Completely removing the Japanese knotweed from your land before you put the property on the market will put you in the best position to make a quicker sale, but you will always have to mention the historical presence of the plant. Japanese Knotweed was not seen within the boundaries of this property, but it was seen on a neighbouring property or land. Therefore, Japanese knotweed doesn't have to be located within the boundary of your property for a surveyor to categorise your property from being at risk from Japanese knotweed. 3. Category: Descriptor: 4: Japanese Knotweed is within 7 metres of a habitable space*, conservatory and/or garage, either within the boundaries of this property or in a neighbouring property or space; and/or. Reynoutria japonica, synonyms Fallopia japonica and Polygonum cuspidatum, is a large species of herbaceous perennial plant of the knotweed and buckwheat family Polygonaceae. Given that the rhizome can spread approximately 7m (if not more) it’s not difficult to see that the rhizome could potentially reach the foundations of the house. They will rarely agree to a price of more than 30% below the market value of the property (before devaluation from Japanese knotweed). Flowers: There are many small greenish white flowers. Category 3: It is within the boundaries of the property but is within seven metres from a living space. How do I know if my house has Japanese knotweed? When we bought it there was nothing in the survey or mentioned about knotweed but it was discovered later by chance by my Mum who had knowledge of the weed. Garden sheds, greenhouses and conservatories can also be at risk of damage. Japanese Knotweed is causing serious damage to permanent outbuildings, associated structures drain, paths, boundary walls and fences. CATEGORY 4 situations Japanese Knotweed is within 7.0 metres of the main house, habitable spaces, conservatory or garage. VAT Number 477 2974 93. My buyer has now pulled out of the sale as we cannot find out if there is a plan in place to kill the knotweed.”, “We bought our house 3 years ago, there was Japanese knotweed on the land adjacent to the property we were buying. Generally speaking, auction prices for properties start at 15% below their value, depending on the severity of your Japanese knotweed infestation you may need to start 25% lower. Japanese knotweed is within 7 metres of the habitable space and/or causing serious damage to outbuildings, drains, paths and boundary walls (With this fourth category, a further investigation would be required by an appropriately qualified and or experienced person). Japanese Knotweed was not seen on this property, but it can be seen on a neighbouring property or land where it was more than 7 metres away from the boundary. A private nuisance is an act or omission which is an interference with, disturbance of or annoyance to a person in the exercise or enjoyment of his ownership or occupation of land. Category: Japanese Knotweed Japanese Knotweed Barriers – Network Rail. From those roots, you do not get other trees growing. Why We Need Bees (and How Japanese Knotweed Can Help) ... Japanese knotweed can be a real menace. Most of the effects of Japanese Knotweed can be traced back to either the stilbenes (resveratrol) or the anthraquinones (emodin) for the circulatory and gastrointestinal help, respectively. Should I tell my estate agent about the Japanese knotweed? It has been labelled as an invasive plant by the government, and due to its incredible hardy qualities, has become a bane for homeowners who are looking to sell their properties. Downloads. Posted on 15th December 2020 (17th December 2020) ... We have supplied a repeat client with job specific sized pre-welded panels of our Power Scrim 600 for two Japanese Knotweed Burial Cells. Identification: Japanese Knotweed is a perennial shrub reaching 4 to 8 feet in height. Japanese knotweed is so tenacious that it has been known to … Where neighbouring property has Japanese Knotweed, it is a good idea to contact the owner to alert them to the presence of Japanese Knotweed. They also say that they may decline a mortgage even if the property is in Category 1 or 2. You should not attempt to get rid of the Japanese knotweed yourself if you are hoping to sell your property soon. Add to this problem, a fragment of Rhizome, as small as half your little fingernail, can contaminate surrounding soil, on the bottom of a shoe, a lawn mower etc resulting in MORE NEW GROWTH! Everyone understands that, if necessary, any remaining treatment can be completed by a new owner under the same contract. Japanese knotweed is a non-native, invasive plant that can grows extremely fast, reaching up to 3 metres tall with roots that spread for metres in all directions. Excavation of the plants and its roots The Japanese knotweed infested soil can be excavated and removed to an off-site, licensed, waste-management facility. Category Archives: Japanese Knotweed. Unfortunately, it is near impossible for the price of the treatment plan to be reflected in the purchase price, as the plan has to be in place before approaching the lender in order for them to lend. If you’re trying to sell a property with Japanese knotweed and are unsure about what your options are then you can get in touch with us for guidance. You can confirm that your house has Japanese knotweed by finding the plant (in any of its forms) on your property. By Paolo Martini on 18th February 2020 (updated: 16th July 2020) in News. The council confirmed in 2015 they were aware of it but the knotweed is still prevalent. This section gives the seller the opportunity to attach any paperwork related to their Japanese knotweed treatment plan. Hopefully neighbours will be co-operative and the desired outcome will be achieved but unfortunately, neighbours who are less cooperative do exist. 4. It is the most frequently undertaken survey which provides a more in depth report of the condition of a property and gives you professional advice to allow you to make an informed decision of whether to go ahead with buying a property. Japanese knotweed is causing serious damage to outbuildings, associated structures, drains, … Getting an outside opinion should confirm whether or not you have Japanese knotweed on your land. Making a positive identification will allow you to understand to what extent the plant affects the property, which should give you an idea as to how much the Japanese knotweed will devalue your home. What would the problem be with that? Unlike a tree though, from the intricate rhizome you can expect new growth. Do estate agents have to declare Japanese knotweed? Eradication requires determination as it is very hard to remove by hand or eradicate with chemicals. 4 Effective treatment of Japanese Knotweed 6 4.1 Introduction 6 4.2 Excavation of the plant and its roots 6 4.3 On-site burial and/or encapsulation with membranes 6 4.4 Biological control 6 4.5 Chemical control 6 4.6 The costs of effective treatment 7 4.7 Impact on value 8 5 An assessment framework for Japanese Knotweed 9 Patios and driveways can sometimes hide the presence of the plant. Although the only visible part of the plant can be seen on your property, it is safe to assume that the rhizome has spread (migrated, encroached) onto neighbouring property below ground! As always, Zen Knotweed recommend that if you think you have Japanese Knotweed, bonsai or regular, on your property, you should contact an experienced, professional contractor to assess the situation and manage it accordingly. What can I do if my neighbour has Japanese knotweed? It will include all major sections of a property that are visible to the surveyor, so this includes the garden. Although property surveyors are trained to check for Japanese knotweed, there have been cases where surveyors have overlooked or altogether missed Japanese knotweed. If an estate agent chooses to lie or misrepresent a property as being free of Japanese knotweed, then they could be reported to the National Association of Estate Agents. Japanese knotweed is a herbaceous perennial that can reach heights of 9' tall. 0 being the lowest risk, 4 being the highest risk. Thousands of new, high-quality pictures added every day. In some cases, you may find that a company will offer a free informal survey that will help you make a positive or negative identification of the plant on your property. I arranged for a professional to come to have a look and it is not growing in our property but it is growing in our neighbours’ gardens. This has led to buyers going through with a purchase, only to discover later that they have paid an unfair price for a property that needs thousands of pounds of investment to cover the cost of removal. Description. This means that it dies back in winter and re-emerges in spring (so typically the growing season is May – October). Japanese Knotweed is causing serious damage to outbuildings, associated structures, drains, paths, boundary walls and fences and so on. You can sue your neighbour for failing to control the spread of Japanese knotweed on their land, however, this will unlikely help you sell your home any quicker. Whereas boundary walls or small garden walls with shallow foundations can also often hide the plant until they are pushed over by the mass of the vegetation. The hollow brown and brittle stem (looks similar to bamboo) remains as a clearly visible indicator of where the plant stood in the summer months. Leaves: Leaves are dark green and are 4-6" long. contacting the Environmental Agency directly, Japanese knotweed on your neighbour’s land. By setting out a framework for objectively assessing and reporting the risk posed to a property by the presence of Japanese knotweed, this paper assists home-owners, purchasers and lenders in making informed decisions. Resveratrol (3,5,4'-trihydroxy-trans-stilbene) is a natural compound found in red grape skin, Japanese knotweed (polygonum cuspidatum), peanuts, blueberries and some other berries. You should tell your estate agent about the Japanese knotweed on your property, as in order to sell your home they need to be able to give potential sellers an honest impression of the house that reflects its true value. In winter the plant dies back to ground level but by early summer the bamboo-like stems emerge from rhizomes deep underground to shoot to over 2.1m (7ft), suppressing all other plant growth. 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