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Cost of Granny Annexe

Are you interested in knowing the price of a Granny Annexe?

In this article we’ll look at the various costs involved in building the granny annexe. This includes expenses for supplies, extra expenses, and costs for tradespeople.


Are you interested in knowing the price of a Granny Annexe?

In this article we’ll look at the various costs involved in building the granny annexe. This includes expenses for supplies, extra expenses, and costs for tradespeople.

How Much To Build a Granny Annexe?

In recent times, multi-generational families have become more common due to adults staying in their homes for longer, or due to older relatives that require additional assistance.

Keep them in close proximity…

If you’ve reached the stage where you’re worried about your loved ones health and wellbeing, you could face similar choices. An annexe for granny is an excellent way to stay close and still allow them to live independently.

You are invited to come by every day to check up on their wellbeing and help them in tasks like the cleaning as well as personal hygiene. It is possible to invite you to join us for dinner at night. An annexe that is a granny’s house provides the security of a space that is cozy and distinctive.

There’s something you must keep in mind…

If you are planning to build an addition with contractors who are separate There are a number of costs to be considered for example, an architect, making sure that the project is in compliance with Building Regulations, planning approval services, and lastly, the labour and materials required for the construction.

A lot of these costs are bundled into one package, with prefabricated add-ons, particularly when you use the turnkey services we offer like ours. This will help you save money along with time and anxiety.

An annex for the granny is a complete solution!

An annexe for granny is a self-contained home with bedrooms, bathrooms and kitchen as well as a living space. It is not an inexpensive project. It’s important to consider the construction, furnishings, and fittings into your budget.

The cost of building an annexe to a granny ranges from £80,000 to £100,000. The cost of purchasing the kit to build a granny annexe could cost between £29,000 and £51,000. There are many other possibilities to take into consideration.

There is also the possibility of a garage conversion that transforms the garage into an annex that could cost you between £7500 and £20,000. A loft conversion could cost £37,500-£60,000. Lastly, basement conversions would cost you between £100,000 and £160,000.

There is also the need for building regulations, which will cost you an additional £200 to £500 in addition to the overall cost. utilities diversions or work will cost between £4,500 and £5,000.

Granny Annexe Prices Annexe Prices:

The table below will outline the different prices to put up an extra granny room in your home:

Cost to build a granny annexe£80,000 – £100,000
Granny annexe kit£29,000 – £51,000
Garage conversion£7,500 – £20,000
Loft conversion£37,500 – £60,000
Basement conversion£100,000 – £160,000
Building regulation£200 – £500
Utility diversion or work£4,500 – £5,000

What are the Supply Costs to Build a Granny Annexe?

The idea of slashing costs on labour can be attractive However, one of the things you don’t want is a dangerous and weakly built annexe.

This choice is largely dependent on your knowledge and experience in the field, but you’ll have to determine what you’ll require to build an annex for your granny. To that end we’ve developed an area that only covers the cost of supplies and omits the cost of labour or any other expenses.

In the beginning, you’ll need permission for planning to ensure that it is safe and legal to build a granny annex within your garden or home. The cost for submitting an application for planning differs based on the region you reside and where you are in the UK. In England the application process for a single-home construction or outline permission for planning costs £462. In England, a householder’s application costs £206.

In the beginning, you’ll need to ensure that your granny annexe has a strong base to keep your grandmother’s annexe safe. To do this, you’ll have to purchase pressure treated wooden posts that cost between £24 and £136. It is important to determine the dimensions you require before buying. Also, you will require shovels that will cost between £7 and £25.

Additionally, you’ll need mixed concrete which can cost between £6 and £13, depending on how much you’ll require. You’ll need to purchase insulation to ensure that your granny annexe is warm. This will cost £19 to £49. It is necessary to buy windows that depend on the kind of window you desire. They may cost £129 or £400. A door can cost £40 to £600.

The plumbing in your home is responsible for water supply and the removal of garbage, and helps in making your home a house. Building a home from the beginning is a challenging and costly job. Plumbing can cost between £13,000 to £15,000 for a home with a single bathroom, and one with an en-suite.

This also includes work and energy needed to install plumbing in the property, and then connect it to the main services (water drainage, drainage, as well as sewerage) in the event that it is necessary.

An energy supply connection is priced at around £1,600 to £2 000. But, based on the specific circumstances of your situation costs could be higher or less expensive.

You will then have to purchase everything within your house, like decorating furniture, furniture and toilets, shower, and other things that will have to be installed following the construction of an extension for your granny.

The following table will provide the various costs for supplies when making a granny annexe diy:

Planning permission£206 – £462
Pressure-treated wooden posts£24 – £136
Shovel£7 – £25
Premixed concrete£6 – £13
Insulation£19 – £49
Windows£129 – £400
Door£40 – £600
Plumbing£13,000 – £15,000
Electricity£1,600 – £2,000

What are the Additional Costs of Building a Granny Annexe?

If you are building a granny annexe There is more involved than you imagine when you construct a miniature home for your loved ones or a family member.

If you are planning to have one constructed, you might find that additional costs are associated when you build a granny annexe. This is why we’ve created this section to let you know what extra costs you can expect when you build your granny annexe.

New Kitchen

If you’d like to have a tiny kitchen built into your granny annexe, this would be an additional expense since the whole kitchen will be installed within the tiny home. What is the cost?

The price of making a kitchen remodel will depend on the size of the area and the materials you choose. A kitchen that is simple and has only essential kitchen appliances ranges from £4,000 to £10,000, with the average kitchen costs ranging from £5,000 – £12,000.

All you need is a small to medium-sized kitchen to fit into your grandmother’s annexe. Small kitchens that have seven or fewer elements are priced between £4,000 and £15,000.

The average kitchen size is 10 pieces and range in price from £6,000 to £17,000.

Flooring is a vital element of kitchen installation cost. If you are looking to install a brand new kitchen flooring, anticipate paying between £60 and £75 per square meter for the expert installation of tiles for kitchens.

You may want to think about hiring an expert painter and decorator to paint the walls of your kitchen. This could be as simple as painting your walls which could cost between £300 to £500 for a whole space, based on the dimensions of your kitchen.

New Bathroom:

It is necessary to install an updated bathroom installed in the granny annexe. The installation of a basic bathroom may cost between £1500 to £2000.

A bathroom with a moderate standard will cost between £3,000 and £6,000 and a bathroom of superior quality will cost between £77,000 and £15,000.

The price range could be between £1,000-£3,000 for a bathroom that is small. It is predicted that a bathroom of a moderate size will cost between £3000 and £6000.

It is also necessary to purchase everything needed for a bathroom, so buying a brand new toilet can cost you between £100 to £200 while a shower could cost between £40 to £500.

Shower screens cost you £50 to £150 A brand new bath could cost between £100 and £400. A new sink could cost you £50 £200 while new bathroom taps cost you between £40 and £100.

Decorating and painting

When your granny’s annexe is constructed, you could think about decorating and painting it to give your granny’s annexe the feel of a home. If you are considering redecorating, consider the cost of interior painting for different jobs. Painting a room, as an instance, could cost anything from £180 for a small bedroom, to around £600 for a huge living space.

Additionally, you’ll need to factor the cost of decorating and painting other fixtures, for example skirting boards that range between £180 to £350 as well as window paint that ranges between £400 to £1,500.

Wallpapering is a significant cost for decorating, with prices that range from £180 in a modest area to £600 to remove and hang the wallpaper with internal cladding costing between £1500 and £2500. Since most tradesmen cost for their services, knowing the length of the task will be required to establish the final price is essential.

If you’re having just an incredibly small one-bedroom Granny Annexe painted it’ll take just a few hours to finish. However in the event that you’re required to remove the wallpaper or paint to be removed, you’ll have to extend the time by a day.

Floor Installation:

The typical cost for flooring installation is £400 to £1,000 in the majority of instances. The price of installing flooring of a new design, however, will differ based on the flooring you pick and the size of your space.

Carpet is a form of carpeting made from textiles which is typically made from nylon, wool or polyester. It has the average price of £90 to £900. Laminate flooring is an innovative synthetic floor that has a look similar to more costly floor options such as stone and wood. The installation cost for laminate flooring can range between £170 up to £800.

Hardwood flooring consists of a variety of solid wood species like white beech, maple, oak as well as red cedar and other species. The price of installing wood flooring ranges from £550 to £1,750. Vinyl is similar to laminate flooring however, it’s composed of only synthetic elements like fibreglass, PVC vinyl and plasticiser.

The average cost for installing vinyl flooring ranges from £90 and £450. Tiling installation prices range between £400 to £1,380. Karndean flooring installation costs range between £600 to £2,400, and parquet flooring installation costs range between £200 and £2,500.


Plastering costs include mainly labour costs since plastering homes takes the duration of. The cost of putting up a wall can vary from £300 to £900.

The cost of putting up two rooms with a similar size could cost between £400 and £600 While tiny patch repairs could cost between £100 to £200.

The size of the space which requires plastering and the condition of the location and whether or not the area requires plasterboards are all elements that can determine how long a task takes.

It is also important to consider whether a simple skimming procedure is needed as well as any waste removal work that might be required and the location you live in the United Kingdom. The process of plastering a home may take from 3 hours and 4 days.

New Radiator:

A single panel radiator will cost between £110 and £210 to install. A double panel radiator will cost between £140 to £240 to install. A horizontal radiator will cost between £260 and £470 to put in Vertical radiators should cost between £280 to £440 to put in, a column-style radiator will cost between £290 to £470 to put in and heating towel radiators should cost between £130 and £230 to put in.

The installation of a new radiator can cost between £30 and £70 per hour, and the average cost for a day between £240 and £320. But where you are in Britain, the UK will have an enormous influence on the price.

Minimum Fee:

In many different situations workers may choose to make minimum wage. On one hand it could be in as a lump sum rate which is added to the total amount. However, it can be used to prolong an existing charge under certain conditions. Think about the situation where you are charged a per-day labour cost. If the work took a full day, three hours or a day and 7 hours you’d be paid for two days’ labour.


Since the cost of hiring builders varies throughout the nation, where you reside can have a major financial impact. For instance, the rates of labour in the southeast, especially in London, are higher than those in the rest of the UK and Scotland, Northern Ireland, and the northern part of England are in the opposite position.


Due to the cost of labour costs, the longer you have to work to be on site the more you’ll be charged. If the tax rate is per day, you’d be charged for three days of labour, whether the task required 2 days, 3 hours or 6 hours. If a fixed price has been set in advance the cost of labour is not affected due to the passing of time.

Tradesman Costs to Build a Granny Annexe

In the case of structural and construction work, you’ll probably need the help of an architect (or construction workers).

We’ll discuss the labour cost of making a granny annex without any additional costs or supplies to help you determine the amount you’ll save when you build it yourself. It is recommended to budget between £150 and £280 per day for a tradesperson who will build your granny’s annexe.

The amount you pay will depend on the expert’s knowledge as well as the complexity of the project as well as your location within the United States. For instance, builder-day prices are more expensive in London and in the Southeast. If you are self-employed it is possible to pay around £25 each hour.

The main difference between being self-employed as opposed to operating for a construction business is that self-employed workers typically have a lower hourly cost because they do not have to pay for the overhead and administrative expenses of a larger company. But, this can vary depending on your experience and location located in your home country of the United Kingdom.

We generally recommend obtaining at least three quotes from various builders in your area, just as we do with all professionals. You must do some research to make sure you are paying an affordable and fair price to complete the task. It is also necessary to employ a plumber for the sewage and water work. It is contingent on how big, complex, intricate, and/or difficult the plumbing job will be.

Toilets, sinks, and other plumbing elements that are difficult to access or require disassembly, then reassembling later on will take longer, resulting in a higher cost. The majority of plumbers cost between £20 to £40 for an hour. The total price will differ based on the nature of the project.

An electrician will be required to set up the plug sockets and lights around your annexe. The typical estimate is costing between £280 and £450 for this type of service. For other tasks, however, we’ve seen quotes of as low as £150 per day. Electricians located in London expect to pay approximately £75 for an hour. 

Electricians working in southern England will be a bit more expensive than those who work in the majority in the UK:

How Long Does It Take to Build a Granny Annexe?

Granny annexes are fast becoming an alternative solution to the current housing shortages. They’re perfect for retirement planning and elder support (granny flats) and young self-employed homeowners’ first homes as well as single-parent and single-income houses, as well as downsizing and freeing equity.

We will walk you through the process of building an annexe for a granny so that you can get an idea of how long it will take to be finished and you or your family member will be able to move into the secure area. The choice to build an annexe can be the most difficult, as it usually requires several family members to determine how the annexe will be used.

With issues such as inheritance tax, council tax, operational costs, moving expenses and many more to think about financially, the decision isn’t one to dive into without a thorough analysis. The process of deciding what you want to do can take around two months, on average.

If you’ve decided on a particular business to construct your annex, you’ll typically have to make a payment in the form of a down payment or planning fee prior to moving to the next step, that’s the critical planning permission stage. It typically will take about 10 weeks.

The foundations and primary services connections for your annexe will be the steps that follow. Based on the location where your services are situated as well as what amount of preparation needed and the dimensions of your home it will typically take approximately 1-2 weeks.

The typical construction on-site can take 7-14 weeks to finish, based on the dimensions and specifications of the attached building, beginning with the construction of frames, windows and doors, roofing and external cladding, to the fitting of the kitchen and bathroom floors, plumbing electrical wiring as well as painting and decorating inside.

This table will give how long is required to build the granny annexe:

Making decisionsTwo months
Permission to planTen weeks
The foundation stage and the services stage1 2 weeks
Average build7-14 weeks

Types of Granny Annexe

If you’re trying to decide which is the best granny annexe We look at the different kinds of granny annexes, including their pros and cons. So, if you’re pondering which is the best granny annexe I hope this article will assist you in your choice.

Traditional Granny Annexe:

A traditional Granny Annexe divides a portion that is part of the rest.A independent living space that is self-contained that includes a bathroom and kitchen will be located in this area within the property. They might have their own entrances or share the same entrance however they are nearly always connected to the structure and are located on the lower floor.

Ideal for estates with large amounts of additional space or large gardens that can be accommodated by the larger structure.


  • The ground floor is where the building is located.
  • It is connected to your residence.


  • It’s not the largest space.

Granny Flats

A granny flat can be described as a variation of the traditional granny Annexe. One story of the structure could be devoted to the development of an independent flat, instead of an addition to the house, which is more common in cities with high population.

It is a common feature in cities such as London in which space is scarce; the unit occupies one floor of a house for families. This is a great option for families who wish to remain in their current house because there’s not much space to build an extension.


  • Feels like home.
  • Get some independence.


  • Expensive

Ancillary Building

Annexes of this kind can be built on site or off-site. The idea is to construct a semi-permanent or permanent mobile house in the backyard of your home.

The structure must be connected with the house’s utility systems and thus it becomes an accessory. There are many examples of outhouses being modified to accommodate older people.

It can be constructed using an outhouse that you don’t utilize. If you don’t make use of your outdoor space, it can be converted into an annex for granny. Even small structures can be transformed to be amazing, and you’ll be awestruck at how well even basic spaces could be redesigned.


  • You can build in your backyard.
  • Connected to the main house utilities.


  • It is expensive to construct.

Prefabricated Annexe

An already-constructed granny annexe can be bought. There are a variety of configurations to pick among, while some firms even let you create your own annexe.

An annexe that is prefabricated comes with all the fittings and fixtures, and is constructed on the spot. An already-constructed granny annexe usually costs between £40,000 to £40,500.


  • You can design it yourself.
  • Make exactly what you want.


  • It is recommended that a company construct this type of building.

The benefits of building a Granny Annexe

A granny annexe can bring many advantages for your home, and we’ll discuss in this article. If you are unsure about building an extension for your granny, this article will assist you in making the final choice.

Additional Time to Spend with Your Special One

With busy schedules making the time to spend with or go out with an elderly parent isn’t easy. It’s much more enjoyable for them to be nearer and closer, whether they’re bringing the family over for dinner or simply having a chat around the yard.

Sensible for financial reasons:

If your loved one’s savings total more than £23,000 or £24,000 savings, they aren’t likely to qualify for council funded care. Innovative alternatives, like the possibility of reducing an existing annex to or near to a child’s residence could be an appealing alternative in these situations

The money earned from the selling of an existing house could be used to pay the expenses of taking care of the loved ones. This also makes it easy for parents to handle the additional responsibility of caring for their loved ones, thus reducing the need for professionals to care for their loved ones.

More Independence:

It’s much easier to help your loved ones’ living space feel like their own and provide them with more of a feeling of autonomy rather than transferring them into a facility for care.


A granny annexe located in the backyard with family members in the home can make your family members feel more secure, while the addition allows them to maintain some autonomy.

Our clients feel reassured knowing that their family members are at hand in the event of a crisis. They also feel more secure since they’re within a familiar setting for a longer period of time, providing the client with greater stability and security.

Property Value:

A granny annexe added to your home will definitely increase the value of your home. While it’s difficult to determine an exact number about the increase, the neighbourhood real estate professional is a good person to seek advice from.

What is the cost to Remove an old Annexe?

If you own an annexe for your granny at home and are looking to eliminate it in order to make more room to store things it is important to be aware of the amount it will cost you to take it down. In this article, we’ll go through the various costs required for removing a granny’s annexe out of your home.

The price will be based on the materials used to build the granny annexe in addition to any additional factors, like the use of prohibited or dangerous materials during the building. The cost will also be determined by the kind of base it sits on, as well as the difficulty removal.

If you are able to disassemble it on your own, the price can vary between a few hundred to a few thousand pounds to get rid of hazardous and/or deep-seated objects.

The typical cost of taking down a granny’s annexe is around £200. If asbestos needs to be removed, you will need to be charged an additional £200 or £1,350 on top of the removal cost.

You should also consider whether you’ll require a skip hire to remove. The average cost of hiring a two-yard skip is £70 and £100 and a four-yard skip costing £100 to £160 and 6 yards of skips costing between £120 and £190.

The cost of an 8-yard dumpster is around £150£370.  A 10-yard skip is priced at £180 or £410 while a 12-yard skip will cost between £220 and £450.

A 14-yard skip costs between £230 and £460 The 16-yard skip is available between £240 and £480. An 18-yard skip that runs between £280 and £500 and a roll-on-roll-off skip between £300 and £500. The dimensions of your granny annexe that you are having removed will be contingent on the total cost of removal.



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