2026 Edition
The self-build case
The smart investment is the one you build.
Henley-on-Thames · Thames Valley
01 · The self-build case
Buying a home is not the investment it once was. Here’s why:
Our target on every project: a finished home worth 10% or more over land & build costs, measured by independent valuation at completion.
New builds cost up to 39% less to heat and power than older homes (Home Builders Federation, from EPC data).
Brand new, with no immediate maintenance to budget for.
Spaces designed around you, future-proofing your family’s needs.
02 · Case study
Traditional timber windows obtained at trade prices with a 10-year product warranty – a significant discount passed on directly to the client without a markup, as is the case with all supplies and services from our trade partners.
The decision to paint the external brickwork – debated at length – proved a fine one, softening the built form to settle the house comfortably into its village setting.
Following a ground investigation, an engineered raft foundation was required, adding slightly to the relative cost but ensuring a 10-year warranty could be secured on the development.
03 · Sample transaction
Self-build versus buying the same 2,000 ft² home on the open market.
Market value for a 2,000 ft² home, from local Sold Price* data.
Market value for a 2,000 ft² home, from local Sold Price* data.
Charged separately for the transaction.
Land acquired at the agreed price.
Charged on the full purchase price.
Charged on the land only.
Updating an older home can add substantial renovation costs that are disruptive and difficult to schedule.
All costs, incl. architects, planning, consultancy, legal, build costs, landscaping and monthly self-build mortgage payments.
* Market value based on local sold prices in the last 12–18 months, per propertydata.co.uk. Illustrative only – figures assume a 2,000 ft² home, a £625/ft² finished-housing valuation. Stamp duty shown at residential rates current at the date of publication.
04 · The process
Six steps, from plot to positive equity.
A curated bank of plots – some with planning already secured, some without – where Brock Hatherton obtains the permission at our own cost and risk.
We walk through the full budget to buy your preferred site and complete the build, including the choices that move the project costs up or down.
We guide you through the land purchase, with our specialist self-build mortgage partners on hand where finance is required. Specialist lenders now advance up to 95% of land costs and up to 95% of build costs – making self-build a viable option to anyone with income and savings, not just the cash-rich.
Once the land is yours, you decide – refining the internal spaces, choosing the finishes and dictating the technical specification in accordance with our advice and the pre-agreed budget.
We manage the entire build process so you don’t have to, delivering to the agreed schedule.
Our structured target is a finished home worth 10% or more than you pay in land and build costs combined.
05 · Peace of mind
Self-building is not the risk Grand Designs makes it out to be, if structured and approached professionally. Here’s how we take away uncertainty.
What if I can’t get planning?
We secure planning permission at our own cost and risk before you commit to buying the land – so you never buy a plot you can’t build on.
What if it costs more than planned?
Budgets are set with a developer’s cost-discipline and agreed before we start. You choose finishes against a known number, and we track every figure – including VAT owed back to you.
What if the build drags on?
We manage the entire programme to an agreed schedule, with the same trades and oversight we use on our own developments.
What if the finance won’t stack up?
We introduce you to specialist self-build lenders, and in certain cases cover your interest-only payments through construction.
What if something’s wrong at the end?
Every completed home carries a 10-year structural warranty – brand new, with nothing to fix on day one.
06 · Why work with us?
With a combined three decades’ experience in property development, we bring a developer’s project-discipline and budget control to every scheme. But the real advantage lies in our structure.
A modern joint venture
Think of it as a modern joint venture: we partner to build your home, we skip the cost of selling and financing it – and in return you keep the developer’s margin as equity.
of the cost of obtaining planning permission – covered by us.
markup on consultants, tradesmen & suppliers – you get the same prices developers obtain.
of your self-build’s mortgage interest (related to the construction) covered by us, for free.
unique plots in the areas of Berkshire and Oxfordshire.
Meet the founder
Sebastian trained and qualified as a Solicitor out of Magic Circle law firm Allen & Overy LLP in London. He subsequently set up a property development business in 2013, focusing on new-build developments around Henley-on-Thames. Alongside the operation of the main business, Sebastian has built two homes for himself since that time, and with nearly 14 years of relationship-building in this space, he is well placed to guide you on your self-build journey.
07 · Our self-builds
In a conservation area, natural slate was required by planning condition. Given the cost of Spanish and Welsh slate, Chinese slate tiles were sourced at nearly a third of the standard alternative.
The blue header banding course was deliberately designed into the primary elevation, to help the house blend with the historical appearance of its neighbours.
To meet building-regulation requirements for sustainable drainage, permeable block pavers were sourced through our trade partners – water dissipates into the ground rather than running off into the street.



A quick gut-check
If you nodded to three or more, let’s have a conversation – an honest, no-obligation look at your objectives, budget, and the advantages we bring to the table.
Book your appraisalFrom day one, Seb brought not only an incredible depth of knowledge and experience, but also reassurance, patience, and a calm head when things felt overwhelming.
Chris & Mel · Berkshire
Invaluable service that made our build much less stressful. Seb guided us at every stage and really helped us make the right decisions.
Pam · Berkshire
The case for building your own.
brockhatherton.com · seb@brockhatherton.com · 07703 035 139