The Investor's Guide to Property Flipping.

How to finance, refurbish, and sell for profit — and what separates successful flips from costly mistakes.

Property flipping — buying, refurbishing, and selling for profit — can generate significant returns, but the margins are thinner than they appear on television. Success depends on accurate cost estimation, the right finance structure, and a realistic assessment of the end value before you commit. This guide covers the fundamentals.

Property Investment Guide

Free Consultation

1

The basic arithmetic of a flip

The profit on a flip is: sale price minus purchase price, minus refurbishment costs, minus finance costs, minus transaction costs (SDLT, legal fees, estate agent). Every number in that calculation needs to be known — or conservatively estimated — before you buy.

A common mistake is working backwards from a desired profit. The correct approach is to establish your Gross Development Value (GDV) — the realistic sale price of the finished property — then deduct all costs to arrive at the maximum you can pay. If the asking price is higher than that maximum, the deal does not work.

2

Financing a property flip

Most flips are financed using bridging loans or refurbishment finance, rather than standard mortgages. Standard mortgage lenders will not lend on uninhabitable properties (no working kitchen, bathroom, or heating), which describes many flip opportunities.

Refurbishment bridging finance typically advances 70–75% of the purchase price plus 100% of the build costs, drawn in stages as work is completed and certified by a monitoring surveyor. The facility runs for 6–18 months, giving you time to complete the works and sell.

Once the property is sold, the bridge is repaid from the sale proceeds. Interest is typically charged monthly at 0.5–1.5% and can be retained (deducted from the loan upfront) or serviced monthly, depending on your cashflow preference.

3

Assessing refurbishment costs accurately

Underestimating refurbishment costs is the most common reason flips fail to generate the expected profit. Get fixed-price quotes from contractors before you complete your purchase — not estimates, and not quotes from a single tradesperson. Cross-reference quotes and build in a 15–20% contingency for structural unknowns.

Costs vary significantly by property type and scope. A cosmetic refurbishment (kitchen, bathroom, decoration, flooring) on a two-bedroom flat might cost £25,000–£40,000. A full structural renovation of a Victorian terraced house, including damp treatment, rewiring, and new heating, could run to £80,000–£120,000 or more.

4

Stamp Duty considerations for investors

Investors purchasing an additional property pay a 3% SDLT surcharge on top of the standard rates. On a £250,000 purchase, the SDLT is £10,000 rather than £2,500. This must be paid within 14 days of completion and should be factored into your day-one costs.

There is no SDLT on the sale — but Capital Gains Tax applies to the profit. For a higher-rate taxpayer, CGT on residential property is currently 24%. If you are flipping regularly, HMRC may treat the activity as a trade, in which case income tax applies instead. Take advice on the right structure before scaling your activity.

5

Selling the finished property

Time is money when you are paying bridging interest. A property sitting unsold for three months at 0.9% per month on a £200,000 loan costs £5,400 in additional interest. Price realistically from day one rather than testing the market at an optimistic figure and reducing later.

Presentation matters disproportionately in the sub-£500,000 market that most flips target. Professional photography, staging, and kerb appeal work is cheap relative to the finance cost of a slow sale. A property that sells in four weeks rather than twelve saves more money than almost any other decision you can make at the end of a project.

What to remember from this guide.

Start with GDV and work backwards — never pay a price that only works if everything goes perfectly
Get fixed-price contractor quotes before you buy, not estimates after
Build a 15–20% contingency into your refurbishment budget
Factor in bridging interest, SDLT surcharge, CGT, and legal fees before committing to a deal
Price to sell quickly — every extra month of bridging erodes your profit margin