The Just Enough Approach to Self-Build

Good evening!

Last week I wrote about not knowing where to start with a self-build. My conclusion was deliberately simple: do something, do anything. Take one small action, because movement creates information and that information makes the next step easier to see.

I still think that is the right place to begin, but the idea needs to be expanded because it creates another problem almost immediately.

Once you start, how much do you actually need to know before moving on?

The Just Enough Approach

One of the things I find difficult about self-build is that none of the major stages really work in isolation.

It would be convenient if you could completely sort out Finance, then move onto Land, then complete Design, then work through Planning and Specification. But that is not really how it works.

You need to know roughly how much money you have before looking seriously at land, but you cannot know exactly how much you can spend until you have some idea of what you want to build. You need to understand the area you want to live in before searching properly for a plot, but the price of land in that area may change the size and type of house you can afford. You need some idea of the construction method because that can affect build cost and the finance available, but you probably cannot make a final construction decision until you understand the design and the site. You may also need to know something about materials, glazing, heating and external finishes before planning, even though the detailed specification may still be years away.

You need some of everything before you can completely solve anything.

That is where I think a lot of information overwhelm comes from. There are books, courses, podcasts, YouTube channels, planning policies, mortgage products, construction systems and thousands of individual products that you could research.

When I look at the whole thing at once, it can feel like building a puzzle in the dark. You know all the pieces are there, but finding the one piece you actually need at that moment is another matter.

I have thousands of atomic notes stored in my second brain. In theory, it should become more useful as it grows. In practice, there are times when the number of things I could explore makes it harder to use any of them.

The information starts to feel more like debt than an asset. I think the answer is what I am starting to call the Just Enough Approach.

The idea is not to completely understand one stage before moving onto the next. It is to understand just enough of each stage to make the next useful decision.

At the beginning, just enough Finance might mean knowing roughly how much cash, equity and borrowing capacity you have. You do not need a final mortgage offer. You do not even know what you are borrowing against yet. You just need enough information to know whether your likely project sits closer to £250,000, £400,000 or £600,000.

Just enough Land might mean deciding where you are prepared to live, understanding roughly what plots cost there and recognising the broad planning constraints you are willing to accept. You do not need to have found the perfect plot. You need enough knowledge to recognise whether a plot that appears tomorrow deserves further investigation.

Just enough Design might mean knowing approximately how much space you need and what sort of house you are imagining. A 120m² timber-frame house creates a different set of assumptions from a 250m² masonry house. You do not need construction drawings at this stage. You need enough of an idea to make the Finance and Land conversations more meaningful.

The same applies to Specification. You probably do not need to choose the exact taps or kitchen appliances, but it may matter surprisingly early whether you are imagining large areas of glazing, stone cladding, Passivhaus levels of performance, a heat pump or a particular construction system. Those choices begin affecting cost, planning and design long before the exact products need selecting.

Then you go around the loop again.

Your second look at Finance is better because you now understand roughly what you want to build and where. Your second look at Land is more focused because you have a better idea of the type and scale of plot the house requires. Your next pass through Design becomes more realistic because you understand the budget and the constraints of the sites you are actually finding.

Each pass contains a little more detail than the last.

That feels much closer to how self-build actually works than trying to finish one stage before allowing yourself to think about another.

It also changes how I think about research. Instead of asking, What do I need to know about self-build? I can ask, What do I need to know about this part of my project to make the next decision? Which is a much smaller question.

It also gives me a way to judge whether more information is useful. If another book, video or podcast is not helping answer the question that is currently preventing progress, perhaps I do not need it yet.

That does not mean the information is unimportant. Its time just has not arrived.

There is an interesting parallel in the work of psychologist Dr Peter Suedfeld. His research into Restricted Environmental Stimulation explored what happened when visual and auditory input was deliberately reduced. Rather than becoming less capable, subjects often became calmer and more creative.

I think there is something useful in that. When the problem is too much input, adding another browser tab may be exactly the wrong response. Sometimes the better move is to deliberately reduce the number of things you are allowing yourself to think about.

There is also a cost to staying in research mode indefinitely. Time does not stop while you learn. It is remarkably easy for another year to disappear while you continue to read, compare and prepare without actually moving the project forward.

Which is why I think last week’s idea and this one belong together.

When you do not know where to start: Do something, do anything. Once you have started: Learn just enough to make the next decision.

Then go around the loop again. You do not need to solve the entire self-build.

You need just enough Finance, just enough Land and just enough Knowledge to keep the project moving.

This Week’s Biggest Self-Build News…

EPC open data has moved to a new service

July 2026

The government has recently changed how researchers and developers access Energy Performance Certificate data. EPC open data has moved into a dedicated Get energy performance of buildings data service, separate from the wider Open Data Communities platform.

The new service is intended to provide more reliable access, faster refreshed data and clearer guidance for people using bulk EPC datasets and APIs. View the new EPC data service.

This caught my attention because I have been working with EPC data for an article I am writing titled How Big is Big Enough?

One of the surprisingly difficult early self-build decisions is how large the house should actually be. It is easy to begin with a number such as 150m² or 200m² without much context for what that represents compared with the homes people already live in. In a land finding course I attended the most common size plot people wanted was 1 acre… which is far too large for what most people actually need.

EPC records include total floor area and property type, which makes it possible to analyse the size of millions of existing homes and build more useful benchmarks for detached houses, semi-detached houses, terraces, bungalows and flats.

That fits neatly with the Just Enough Approach. Early in a project, you probably do not need a finished floor plan. You may simply need enough evidence to decide whether the house you are imagining is closer to 100m², 150m² or 250m². That one decision immediately begins feeding back into Land, Finance and Design.

I will share the full analysis once I have finished working through the data. Read MHCLG’s explanation of the change.

£3.4 billion of water investment could unlock constrained housing sites

13 August 2026

Ofwat has provisionally approved up to £3.4 billion of additional investment for 13 water companies, covering projects intended to improve drinking water quality and support new housing and other development.

This is a material development from the water issue I covered recently. The previous story was about water availability becoming a planning constraint. This one is about money being directed towards infrastructure that could help remove some of those constraints.

​Read the report.

Building Safety Regulator delays are starting to ease

8 August 2026

Approval waiting times through the Building Safety Regulator have reportedly fallen substantially following staffing and organisational changes. The median waiting time for a key approval to start construction was reported at 22 weeks at the beginning of August, down from 43 weeks a year earlier.

This is not directly a self-build regulation change but it is still useful to watch because it shows how much time itself can become a project cost. A delay does not just postpone completion. It can increase finance costs, professional fees, temporary accommodation and exposure to changing material prices. Read the Financial Times report.

Could mortgage lending become easier for irregular incomes?

The FCA has recently closed a consultation on changes to mortgage lending rules intended to help more creditworthy consumers access suitable mortgages. Among the areas being reviewed are variable and irregular income, alongside older borrowers, credit-impaired applicants and other groups who do not fit neatly into standard lending criteria.

The FCA is not proposing to remove affordability checks. The idea is to give lenders more flexibility where existing rules may be excluding people who can actually afford the borrowing. Final rules are expected in the second half of 2026. Read the FCA consultation.

This is one I am particularly interested in because my own income is irregular and I want to become a self-builder.

Self-build finance is already more specialist than a conventional residential mortgage because the lender is assessing both the borrower and the project. If the FCA eventually gives lenders more room to assess irregular income in a less rigid way, it would be good to know whether that genuinely widens access for people like me, and possibly you, or whether specialist self-build lending remains largely unchanged.

There are no new rules yet, so I would not make any financial assumptions based on the consultation. But it is one I will be following because it could eventually affect who is able to get through the Finance part of a self-build in the first place.

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I hope this week’s idea helps make the scale of self-build feel a little more manageable. I’ll dig into what to focus on specifically for each stage in future articles.

Feel free to send any comments or feedback by hitting reply.

Brendan