If you are considering a self build you probably have hundreds of questions that need answering. Our guide is here to give you advice on planning, designing and executing your project, from start to finish
Self build homes are a popular path to homeownership in the UK, but many people are unaware of its benefits compared to in other parts of the world, including mainland Europe, where building your own home is far more common.
There are so many plus points to self build. Not only does it give people the chance to tailor their house exactly to their needs, as well as usually enjoying a not insignificant profit if and when they come to sell, but you will also get more house for your money as well as the chance to live in a more sustainable home, providing you follow a few self build tips along the way.
Of course that's not to say that building your own home doesn't have its challenges. However, if you have the time, energy and determination, the results can be breathtaking.
If you're considering self building, this guide will be invaluable. We have outlined each practical consideration you will need – from planning, to the construction options available to you, as well as likely costs.
What is a self build?
There can be some confusion over exactly what a self build project is. In short, a self build is a project where an individual commissions a house to be built on a piece of land that they own to live in.
The would-be homeowner tends to have control over the build, and can work with an architect, architectural technologist or design-and-build team to create a home that fits their specific requirements.
Confusion arises when self build gets lumped together with custom build, but the two are not the same. They differ in the amount of involvement the individual has in the build and in the self build project management.
Self build does not mean that a homeowner has to undertake the physical work involved in the construction of their home – while approximately 11,000 self build homes are built each year, less than 10% of those homeowners were physically involved in the process by taking on the building work.
That said, most self builders are far more involved in the creative process than those who choose a custom build, taking part in the design stages, choosing tradespeople and deciding on finishes without the limiting scope of a developer's involvement.
Completed in 2022, this oak frame home, by Oakwrights, was built in the garden of the owners' existing home. Build costs came in at £750,000(Image credit: Mark Watts)
Is self building an option for you?
Self building isn't for everyone. You need to be aware there are some issues that come with a self build that aren't there for those buying a house. Juggling budgets and planning constraints, as well as finding a plot in the first place can all seem daunting.
However, in terms of the layout, location and look, self build is all about building a home that’s right for you as opposed to buying something someone else has built that doesn’t quite hit the mark: not enough bathrooms, box room bedrooms, no separate office and so on.
And that’s why people choose to self build. For some, it can be the only way to live in the type of home they want that would otherwise be out of reach financially. Or perhaps you might like contemporary builds but aren’t keen on developer estates, or want to live in a cutting-edge sustainable home.
Whatever the reason behind you considering a self build, you need to be aware that any self build project will demand so much of your time, energy, brain and, of course, money, that you really have to be passionate about wanting to build your own home. If it was easy everyone would be doing it. So when you find yourself on a dark dreary day in December, standing on site in a soggy mud pit, freezing cold, you’ll want to be able to remember the reason why you’re doing it.
Interestingly, here in the UK, self build still only represents a fraction of the new houses being built each year, while over in continental Europe, as much as 50% of new houses built are by self builders.
While this can seem disheartening, the government is hoping to grow this small sliver of self build homes built in the UK by introducing new infrastructure to help those in the UK interested in building their own homes, by giving them better access to finances, self build plots and more.
Ideas such as the Help to Build scheme and projects like Self Build Wales are both worth looking into for would-be self builders – although they're just the first steps.
Every self-build house is different. However, one way to measure a potential cost is to look at a breakdown per square metre. "Build costs range from £1,750-£3,500/m2 on average (exc.VAT)," advises Homebuilding & Renovating's Director of Content Michael Holmes. "DIY self builders can reduce this by 40-50%."
There are some other key considerations which will affect which end of the scale your build sits, including:
Location: Not only do land prices vary across the country, but the cost of labour does also. Building in London, as just one example, will come with a premium in plot and labour.
Size: Largely, the bigger the house the more expensive, however, in some instances, economies of scale can work in your favour to reduce the cost per square metre.
Plan, shape and layout: The more complex your layout, the more expensive the build. A simple, square build will be the least expensive.
Number of storeys: While you'd assume that building more storeys would add significantly to your build cost, it can actually reduce your overall cost per square metre, as additional storeys don't require the same expense on foundations for all the additional space it creates.
Specification: Basic, standard products are easier to source and fit. Anything bespoke or requiring specialist installation will add to your costs.
Involvement: The more people you employ on your build, the higher the costs. What parts of the project are you willing, and importantly able, to contribute to?
Michael Holmes
Michael is Homebuilding & Renovating's Director of Content, Vice Chair of the self build industry body, the National Custom and Self Build Association (NaCSBA), presenter of multiple property TV shows and author of Renovating for Profit (Ebury). He also runs an architectural and interior design practice, offering design and project management services. He is one of the country's leading property experts and has undertaken over 30 building projects including two self-builds and the renovation of a Grade-II listed farmhouse.
Michael is also a regular expert at the Homebuilding & Renovating Shows. He has written for leading British newspapers, including The Daily Telegraph, Sunday Times, Daily Express and The Independent and has appeared on news programmes such as BBC Breakfast.
This stunning oak frame home in Lancashire was completed in 2020. The frame was supplied by Welsh Oak frame and the build costs came in at £290,000(Image credit: Nikhilesh Haval)
How much profit can you make self building?
How much profit can a self builder make? Again, it is hard to state exactly how much of a profit a particular project is going to make – the housing market is never 100% stable and some houses are going to be more attractive to potential buyer's than others. However, there are some averages that can help give you some idea.
"Building your own home has the potential to pay dividends," says Michael Holmes. "A well-considered homebuilding project could potentially net you a profit of 25% when (or if) you come to sell."
Is self build cheaper than buying?
As previously mentioned, the average profit on a well-managed self build project is 25%, meaning you'll get more house for your money if you build rather than buy.
However, self-build mortgages are less widely available, meaning there may not be products offered to suit everyone's financial situation.
This may mean that traditional self-build routes require time and financial input that is unfeasible for many first-time buyers.
However, where self build is not viable for some people, the idea of custom build may suit. This route removes some of the obstacles faced by self builders, including finding land, securing planning permission and getting services to site.
This is also a more hands-off approach, but still offers the chance for an individual home that meets individual needs. Custom build sites are usually managed by developers who can give you more information on the financial requirements.
This self-build project in East Sussex was built by RX Architects on the beachfront. It was designed with family living in mind, and to survive the extreme conditions of its coastal locations(Image credit: RX Architects)
How do you fund a self build?
You’ll need access to money to buy a building plot, to pay for professional services such as architectural designers’ fees and any site surveys, such as measured surveys, and to fund the build itself.
The money may come from savings, equity in your existing home, through a self-build mortgage or a combination of all three.
Surprisingly few high street banks provide formal facilities for self-build finance so you’ll likely need to approach a specialist provider.
"Self-build mortgages transfer money in stages as you build," explains Emma Lunn, a journalist who specialises in personal finance and property. "You can typically borrow up to 75% of your project costs, or more if you already own the plot of land."
Self-build mortgages tend to follow one of two structures, an arrears-type mortgage and an advance-type mortgage. An arrears mortgage is more common, but will require you to front money for a stage of the build yourself, before paying you back at the end of that stage. Advance mortgages pay you ahead of each stage, but will generally offer less favourable rates.
Remember, you’ll also need to account for the cost of your plot, which will consume a sizeable chunk of your budget and set aside between 10% and 30% of your budget as a contingency.
The basic formula you need to stick to is: build cost + plot cost + contingency < the value of your finished house.
For those that have the option, building on a garden plot or any other kind of existing plot that you (or family) already own can be an attractive option for this reason.
Emma Lunn
Emma describes herself as having a "geeky interest in personal finance." She is an experienced journalist specialising in, amongst other things, the financial aspect of property.
Robin Cochrane built his own home for £100,000 in the Scottish Highlands(Image credit: John Need)
How to find a building plot
While finding a plot, at the right price to build your house on is not always easy, there are several different routes to explore.
Specialist plotfinding services like plotfinder.net, which is Homebuilding & Renovating's specially-curated plot finding service are incredibly useful. Plotfinder, which costs only £5 a month, has more than 10,000 development opportunities listed on its site, from plots that have planning permission already, to land without planning as well as renovation projects. It caters for a range of budgets as well as offering a weekly newsletter with a roundup of the best plots coming onto the market.
You should also be proactive in trying to find land yourself. Explore the local area, visit auctions, and use word of mouth to let friends and family know you're looking for a plot, as you never know what this will turn up.
Also, make sure you register with your local authority under the Right to Build, which requires local authorities in England to keep track of the demand for serviced plots in their area.
However, plots will rarely fall into your lap, so you’ll often need to be savvy to secure one.
When you do come across a plot you like the look of, check out the following:
Does it have planning permission that has expired, or is about to expire?
Any access issues?
Any covenants?
Services – are they already in place?
Title deeds – make sure these deeds are ‘absolute’ rather than ‘possessory’ or negotiate on the plot price accordingly
Richard and Tavia Vint initially thought they’d remodel and extend a 1950s bungalow on a great plot but, evaluating the foundations and compromises they’d need to make, it became clear knocking down and starting again was the best option(Image credit: Simon Maxwell)
Which self-build route should you take?
Worried you don’t know much about construction? Don’t let that put you off. You don’t need to know the ins-and-outs to be a successful self-builder. Only around 40% of self builders actually manage their own projects, with the rest using builders or package companies to run it on their behalf.
While the majority of projects are made up of a main contractor and subcontractors, self-managed overall by the would-be homeowners, this isn't the only option for your build, and depending on your budget, and even your own skills, it may not be the best fit for you.
A professionally managed build may call on a project manager to oversee the site and schedule. The benefits of this are not only the experience of someone who manages builds for a living who may be able to predict any potential pitfalls, taking the responsibility off busy homeowners, but also providing a little distance between the self builders and the house during the construction process — helping to manage conflict on the site (and with neighbours).
Other options include package builds and custom build, which use experienced companies to manage the build, find tradesmen and look after the site from start to finish.
Finally, if you have comprehensive building skills, you may choose to take on the build as a DIY project. Bear in mind your home is still subject to Building Regulations and certain elements will be required to be installed or signed off by a competent person.
Lucy Newton and her partner Sam self built their first home using oak frame and SIPs for £267,000 on land gifted to them by family (Image credit: Jeremy Phillips)
Which construction system will be best for your build?
How to choose a construction system that fits the bill and budget? While your choice of superstructure material will have little impact on how your finished self build looks, it is still worth considering the available construction systems:
Some self builders are less concerned with how the house looks ‘under the bonnet’, and are happy to leave the decision with their architect or structural engineer.
It's worth considering that while some construction methods may outwardly appear more expensive than others, they may reduce costs in other areas, such as time spent on site, or the overall build time, which all need to be considered in the final budget for your construction system.
Completed in 2020, this stunning self build is a replacement for the house the owners purchased back in 1998. They spent £400,000 on the build and the house, once complete, was valued at £1.2million(Image credit: Dave Burton and Peter Landers)
Do I need an architect for a self build?
While some self builders do design their own homes, you’ll more than likely need a designer on board to help you formulate plans for your dream home. This might be an architect, architectural technologist, an architectural designer or an in-house designer at a package company.
It can be tough to find an architect or designer you have the right rapport with, so expect to spend at least a couple of months searching for one. It's better to hold off starting your build than to start it with the wrong architect or designer.
How do I get planning permission to self build a house?
When you self build, you’ll have to apply to your local authority for planning permission. The cost of submitting a planning application varies across the UK, but is currently £578 in England.
However, the real cost of obtaining planning permission arguable comes from preparing the plans and documents (the design fees) in readiness for submission and any accompanying surveys (such as ecological surveys) that may be required.
You should find out when your local planning authority has approved your application after eight weeks — although more complex schemes can take longer.
All planning permission is granted with planning conditions attached. Failure to address the conditions will invalidate your consent, making any work done unlawful.
Understanding self-build Building Regulations
All new homes need to adhere to the Building Regulations, and as such, a building inspector will visit at key stages of the build to inspect the work and ensure it complies.
The build will usually need to be inspected at the following stages during a self build:
You can establish contact with and line up a builder, main contractor, package company and/or subcontractors during the design and planning processes, but you won’t get an accurate quote for the work until your Building Regulations drawings have been finalised.
One of the best ways to find a builder and/or subcontractors is through word of mouth – ask your designer, friends, family or neighbours who’ve undertaken projects, and anyone else you know locally who’s built their own home, for recommendations.
Much like finding a designer, choosing a builder requires plenty of research. It’s best to meet with them to discuss your project and to ask them to quote (your designer can help you to prepare tender documents). It’s also a good idea to visit a project they’ve completed and to talk to previous clients.
The best builders and subcontractors will be booked up months in advance, so it pays to start your search as early as possible.
After a lengthy planning battle, the owners of this stunning self build were successful in achieving the home of their dreams. They used Fowler Architecture & Planning who are both an architectural practice as well as planning consultants(Image credit: Mark Ashbee)
What insurance do I need to self build?
As soon as contracts are exchanged on your plot, you will need to have self-build insurance — usually a specialist policy for self builders. A comprehensive self-build policy is advised and will cover any public liability, building works, employers’ liability and personal accident.
Getting services to your self build plot
Getting services to your site (if necessary) can cost between £10,000-£15,000, depending on your situation and whether the connection needs to be made across private land (where you’ll need to secure a wayleave to grant access to dig) or public highways (which may involve road digs).
"For a replacement dwelling with existing services available, expect to pay around £500," says Michael Holmes.
Though gas and bringing electricity to site is not essential during the build, a water supply is needed early on.
Where should you live while self building?
Very few self builders are in the position to remain in their existing homes while building a new one, so you will need to consider where you are going to live while you build your dream home.
Staying with family/friends: the average self-build project takes around a year on site, so if you are planning on staying with friends or family, make sure that you are realistic about the timescale of the project
Renting temporary accommodation: this is an option, but an expensive one (even more so if your project hits any unforeseen delays)
Living on site: erecting a temporary home on site, or staying in a caravan or mobile home, offers an opportunity to keep an eye on the site during the build, but may take its toll over a longer build time.
How long does it take to build a house?
Once you’re finally ready to start on site, you’ll need to know what happens and when, regardless of how physically involved you are in the process. Our guide to the typical self build schedule will give you an idea of what to prepare for and when.
The time your build takes will depend on the construction method you choose. Some modern methods of construction, particularly those that are made offsite, require less time than traditional block construction. On average for a typical two-storey, three-bedroom house, you're looking at around 40 weeks, while some methods, such as structural insulated panels, can reduce this timescale by as much as eight weeks.
Community Infrastructure Levy exemptions
The Community Infrastructure Levy (CIL) imposes a fee on the creation of new homes, which is determined by the local authority and is based on the size of the house.
The good news is, subject to criteria, self builders are now exempt from paying CIL. However, the four-stage exemption process must be followed to the letter.
While there's no limit on the amount of time you have to live in a house before selling for the likes of reclaiming VAT on your build, if you've obtained the Community Infrastructure Levy exemption, you'll need to live in the property for a minimum of three years. If you sell up and move on, you'll be required to pay CIL in full.
VAT on a self build
One of the major benefits of self build is that you can reclaim VAT on most of the building materials. VAT-registered builders and subbies should also zero-rate their invoices (while, of course, if they’re not VAT-registered, they shouldn’t be adding it to bills in the first instance).
In general, you can reclaim for all materials that are fixed into the house, although interpretation of this can be quite complex.
You can only make one claim (using the VAT 431NB form) and that must be made within three months of the project completion.
Obtain and keep hold of all VAT receipts to submit with your claim. Don’t underestimate the time you’ll save by keeping your VAT receipts safely in one place as you go along.
Homeowner Shelagh Krasno was able to reclaim £18,000 when she completed her first self-build project in Hampshire(Image credit: Simon Maxwell)
Self building is undoubtedly a great way to achieve the house of your dreams but it certainly isn't for everyone and, in some cases, the difficulty of finding a plot or obtaining a suitable mortgage can scupper plans before they have even been put down on paper.
It is important to remember that self building isn't the only way to getting a house tailored to your needs. Renovating a house or adding an extension to your existing home are both fantastic routes to a home that can meet all of your needs – and also often result in some impressive profits.
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Sarah is a journalist, editor and the former Web Editor of homebuilding.co.uk. She began her career more than a decade ago, working on the editorial team of Public Sector Building magazine, before joining the wider Homebuilding & Renovating team as Social Media Editor in 2012. Since purchasing her first house in 2015, Sarah has been adding to the ever-increasing list of home improvements she needs to make; including extending over the garage, resurfacing the driveway, replacing existing flooring and revamping the kitchen. Fortunately, her time with Homebuilding means she is not short on design inspiration or top tips to tackle or project manage these tasks herself.
