Expect to pay around £2,500 for a new boilerĪ single storey extension is cheaper to build than a two storey extension because it needs less substantial foundations and steelworks, but building a double-storey extension is the most budget-effective way to gain the most space in one project. However, water-fed underfloor heating, although more expensive to install, and possibly requiring the addition of a new boiler to cope with the demand, is cheaper to run in the long term.
Electric underfloor heating is a cheaper installation choice (and some elements can be DIY-fitted). Underfloor heating will be more expensive. Extending an existing central heating system may only need two days’ work by a plumber, at around £150 per day (excluding materials). Don’t forget to include the cost of adding heating to your new room.Expect to spend between £1,500 to £2,000 per linear metre for sliding or bifold doors.Add around £85 per square metre for plaster or dry-lining, plus paint if these finishes are not included in the build quote.Factor in between £25 to £100 per square metre for your chosen type of flooring.From around £4,500 to £11,000 for your bathroom design, depending the quality of fittings a shower room will cost a similar amount.Between £5,000 and £30,000 on your kitchen design (higher spec kitchens can cost considerably more).The costs involved in fitting out a single storey extension very much depends on the room type you’re adding - a kitchen will be more expensive to equip than a home office, for example - but expect to pay: Additional fees: These can include a tree report (£250 upwards) a flood risk assessment within flood zones (£250 upwards) an ecology report, possibly required by your local authority (from £400) an archaeological report if your home is in an area of archaeological interest (possibly several thousand pounds) a historic building report, likely if your home is listedĬost to Fit Out a Single Storey Extension.A party wall agreement: This typically costs from £700 to £1,000 per neighbour.Building control charges: These will vary according to your extension’s size plan for between £200 (for an extension of 10m²) to £900 (for 80 to 100m²).If you need a certificate of lawful development, you’ll pay £103 and it costs £34 per request for discharging planning conditions Planning fees: For a residential single storey extension in England, the cost of an application is £206.VAT: This is at a rate of 20% of the labour, materials and services.If you are looking to keep costs down, you could always manage your own project Project manager : Factor in a fee of 3-7% of the build cost for project management (you can also agree a daily or hourly rate).Survey: Between £500 and £1,500 if a survey of the existing house is required.Structural engineer : If roof joists and foundations need to be specified, you’ll need a structural engineer. This would cost in the region of £500 to £1,000.Architects’ fees: These work out at around 3-7% of the construction cost, with planning drawings around £2,700, and construction drawings at a similar rate.On top of the build cost, you’ll also need to factor in the following: If you're looking for ways to reduce the cost of your extension, consider taking on work DIY.īefore you begin planning your single storey extension’s design, you need to set your budget and ensure you can afford what you’re planning. These figures might also be driven higher by labour and material shortages.
This is perfect if your family loves to lounge around, especially after a long day of work.Use our Extension Cost Calculator for an idea of how much your extension will cost One of the unique features of this single storey house is the sitout area. It also has access to the service area at the back which can be used as a dirty kitchen as well as the laundry area. Although the kitchen is just average in size, it has a lot of storage spaces. These rooms are equal-sized and have a provision for a full-size bed, an entertainment wall, and a built-in cabinet.Ī few steps away from the living areas is the common bathroom and the kitchen.
Just across from the reception area are the two bedrooms of the house. This room comes with an en-suite bathroom. From the main entrance, you will immediately see the living room in the center and the first bedroom, which is also the Master’s Bedroom, is on the right.
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