How Much Will It Cost? It is essential to draw up an initial budget that covers all the fees from the cost of works, demolition of walls, electrical, plumbing, carpentry, decorating and any planning application costs. In West London and Berkshire, the cost of the extension itself will range from £1500 – £1900 per/m2. Allow a 10%-20% contingency budget for any unexpected costs. Arrow Ltd will always give you a detailed quotation including all building materials with no hidden fees, but it’s always wise to have additional budget for any permission application fees or original structural issues that are encountered later down the line. We offer full project management from your initial concept to project completion so, we are on hand to help with all paperwork (planning permission, Party Wall agreement, structural engineer calculation, etc).

What Sort of House Extension Should I Get? Whether you decide to opt for a single storey or double doesn’t make a huge amount of difference to your extension, as the bulk of the costs are absorbed into the foundations and roofing. However, consider the space you are building on carefully. Bigger isn’t necessarily better, and we will work carefully with you to utilise the space in the best way possible. Also, if you are extending on top of an existing single storey, we will need to ensure the original structure can support the weight of the new one and factor in the cost of reinforcing the old structure if needed. Our structural engineers from Arrow Ltd will consider all building factors, permissions, decrees, steel beams and current layout of existing structures.

Will my Extension Add Value to my Property? When you embark on works such as this you want to make sure that the value added to your property exceeds the cost of the work itself. You also want to be aware of the local price ceiling for properties in your area. We work extensively in West London, Berkshire and the surrounding areas and will be happy to advise you, based on our experience, what extension will be most cost effective for your area and add the required value to your property. Many of our clients are pleasantly surprised when the project is complete and an independent appraiser/surveyor calculates a substantial increase in the value of the property that far exceeds the cost of the building works. If you are concerned about covering the cost, you can easily consider remortgaging.   

Do I Need Planning Permission? If you build within the “Permitted Development Rights” of your property, then you do not need additional planning permission. You can check what measurements you are allowed to extend by on the Government website here. If you are planning a significant extension you will need to submit a planning application which costs £206 so be sure to include it in your budget. Regardless of whether you need planning permission, it’s advised that you obtain a Lawful Development Certificate which costs £103 as it proves that the work you are carrying out is compliant with building regulations should there ever be any queries to the contrary. Arrow Design and Construction Ltd are a full project management service who will always assist with gaining all necessary permissions as well as providing a full warranty for the works we will carry out.

DESIGNING AND BUILDING YOUR HOUSE EXTENSION

The fun part is designing the type of extension you are going to have. This is where we can help you by consulting with you on your initial vision and working with you to design a full and comprehensive plan.

We will start by coming to your home for a free consultation where we will discuss your needs, look at the space and assess the works that need to be carried out. We will then send you a detailed quotation which includes all costs including building materials which come with a 3 year warranty. Once you have chosen to work with us, we will meticulously plan your extension, help you obtain permissions and advise of any pre-works that need to be carried out such as tree removal, or draining works if there’s a history of flooding.

Once the site is ready for works and you have fully approved the design plan, materials and products to be used we will arrive on the first day on time and secure the safety of the site to ensure the rest of your home is protected during the works.

We always aim to be as undisruptive as possible while we carry out the extension work on your house. The benefits of working with us is that we are complete project managers and multi-skilled tradesmen, meaning we are the cost-effective solution. We can complete your extension more efficiently because you don’t have to wait for independent tradesmen to finish the work once the initial build has been completed.

Arrow Design and Construction Ltd provide a top-quality service in all areas of your renovation needs. We will consider any plumbing, electrical or ventilation requirements as part of your house extension design and include it in the quotation. We have the experience and expertise to carry these works out as part of your project which will save you a lot of time on the overall disruption to your home meaning we can complete the job skilfully and swiftly and you can start to enjoy your new space more quickly. We also offer painting and decorating services, kitchen carpentry, bathroom tiling and plumbing services, so if you would like to avail of the complete house extension and renovation package, we will quote for the entire project up front and provide you with a reputable and quality extension from start to finish so there is no delay in your using your extension as soon as we complete works.