Property Development Guide UK
Finding deals, financing and calculating profit
Property development ranges from buying a tired house, refurbishing it and selling for profit, to converting commercial buildings into flats or building new homes from scratch. This guide focuses on the most accessible route for beginners: buying below market value, adding value through refurbishment, and either selling or refinancing to pull out your capital.
Finding Deals
The profit in property development is made when you buy, not when you sell. You need to buy significantly below market value to cover your refurbishment costs, holding costs, and still make a profit. Aim for at least 20-25% below the after-refurbishment value.
Sources of below-market-value deals include: auction houses (where properties sell 15-30% below retail), estate agents (build relationships and ask about properties that need work), direct-to-vendor marketing (leaflets, letters), repossessions, and probate properties where executors want a quick sale.
When assessing a deal, research comparable sold prices (not asking prices) on Rightmove for similar refurbished properties within half a mile. This gives you the after-refurbishment value. Subtract your purchase price, refurb costs, and all other costs to see if the profit justifies the risk.
Financing
For a straightforward refurb-and-sell (flip), you can use bridging finance. This is short-term lending at higher rates (0.5-1.5% per month) that allows quick purchases, including at auction where you must complete within 28 days. You typically need a 20-30% deposit.
For the BRRR strategy (Buy, Refurbish, Refinance, Rent), you buy with cash or bridging, refurbish, then refinance onto a standard buy-to-let mortgage at the new higher value. This lets you pull out most or all of your original capital to reinvest.
Refurbishment Costs
| Work | Typical Cost |
|---|---|
| New kitchen (mid-range) | £5,000-8,000 |
| New bathroom | £3,000-6,000 |
| Full rewire (3-bed) | £3,500-5,000 |
| New boiler + radiators | £3,000-5,000 |
| Full redecoration | £2,000-4,000 |
| New flooring throughout | £2,000-4,000 |
| Loft conversion | £20,000-40,000 |
| Single-storey extension | £30,000-60,000 |
Calculating Profit
A simple profit calculation for a flip: After-refurbishment value (ARV) minus purchase price, minus refurbishment costs, minus buying costs (stamp duty, legal fees, survey), minus selling costs (agent fees, legal fees), minus holding costs (bridging interest, insurance, council tax), minus contingency (10-15% of refurb budget).
Example: Buy a 3-bed house at auction for £150,000. ARV after refurb: £220,000. Refurb: £30,000. Buying costs: £8,000. Selling costs: £6,000. Holding costs (6 months): £5,000. Contingency: £3,000. Total costs: £202,000. Profit: £18,000.
The BRRR Strategy
BRRR stands for Buy, Refurbish, Refinance, Rent. Instead of selling, you keep the property as a rental. After refurbishment, you refinance the property at its new higher value. A 75% loan-to-value mortgage on a property now worth £220,000 gives you £165,000, enough to repay your original purchase and refurb costs and recycle your capital into the next deal.
This strategy lets you build a portfolio without needing new capital for each purchase. The key is buying cheaply enough that the refinance covers your costs.