Land Acquisition for Property Development: How Developers Find, Test and Buy Sites in the UK

What land acquisition means in UK property development

Here is the first thing to get straight. "Land" in development rarely means a green field. In London and most UK cities, the site a developer buys is usually one of three things.

1. Bare or cleared land. A plot, a yard, a car park or a backland site. The simplest to appraise and the hardest to find in a city.
2. A building with potential. A vacant office, pub, club, shop or warehouse that can be converted, extended or replaced. Most London deals look like this.
3. Airspace. The right to build on top of an existing building. The land is someone else's roof, and the deal is a lease or a sale of that right.

Whatever the asset, the process is the same. Find it, work out what can be built and what that is worth, check the planning position, survey the risks. Then agree a price and terms. Each step feeds the next, and skipping one is how buyers overpay.

Land acquisition is also a competition. The same site is seen by housebuilders, funds, local developers and family offices. The buyer who wins is not always the one who pays most. It is often the one who can move fastest with the fewest conditions, because the seller prices certainty too.

Where development sites come from in London and the UK

Most buyers start on the portals and wonder why every site looks overpriced. The reason is simple. By the time a site is marketed, several better-connected buyers have already looked at it. What is left is priced for the seller.

Sites reach a buyer by five routes, and each one changes how much you must check yourself.

Off-market is the route everyone wants and few have. It comes through people who are already on sites. A contractor on a neighbouring job hears that the owner next door wants out. A consultant knows a consent is about to lapse. A lender has a scheme that stopped at the frame.

That is why we tell buyers to judge a sourcing partner by their live projects, not their mailing list. Reading this from the other side? Our guide on how to sell land to a developer explains what a serious buyer will ask you for.

The appraisal before the offer: residual land value

Never make an offer before the appraisal. The agent's pack will contain one, and it will flatter the site. A sales pack uses top-end sales values, the most units the plan can hold and a generic build rate. The missing lines are abnormals, obligations, finance and a realistic programme.

Your own appraisal runs backwards from the finished scheme. Start with the gross development value: what the finished units will sell or let for, from real local comparables.

Deduct the build cost priced by a builder, the professional fees, the finance, the planning obligations and the profit you need. What is left is the residual land value, and it is the most you can pay.

The illustration below uses made-up round numbers. The only change between the columns is a higher build cost, the kind of difference a survey finds in the ground or the structure.

A build cost £400,000 higher takes £400,000 straight off the land value. Pay £1,800,000 on the agent's figures and the profit has fallen by a third before you own the site. The council will not rescue you. GOV.UK's viability guidance states that the price paid for land is not a relevant justification for failing to accord with the plan.

The full method is in our development appraisal and feasibility study service. The common gaps in a pack are set out in the real numbers behind a development site for sale.

The planning check: with consent and without

The planning position decides who carries the biggest risk in the deal. There are two starting points, and the price should reflect which one you are buying.

A site with planning permission gives you certainty on what can be built, not certainty that it makes money. Read the decision notice, not the summary. Settle whether it is full or outline, list every condition, and count the clock.

In England, a full permission must normally be begun within three years of the grant. On an outline consent, reserved matters must be applied for within three years, then work must start within two years of the last approval.

A site without permission is priced on hope. If a consent comes, the uplift is yours and you shape the scheme. If it is refused, you own land worth little more than its current use, after months of fees.

The test is the chance of consent. Read the local plan, the planning history of the site and its neighbours, and designations such as conservation areas or flood zones.

A refusal is not always the end. In England, an applicant can appeal to the Planning Inspectorate for up to six months from the date on the decision letter. An appeal takes time and money, and the odds depend on the policy case, so price it as a risk and not as a plan.

Deal structures that protect the buyer

The structure of the purchase decides who carries the planning risk, and for how long. Five structures cover most UK land deals.

1. Unconditional purchase. You exchange and complete with no conditions. Fastest and most attractive to the seller, so it can win a site at a lower price. Only right when the planning position is already settled or the price already carries the risk.
2. Conditional contract. You exchange now, and completion depends on a satisfactory planning permission within an agreed period. The seller takes the land off the market while you apply. Define "satisfactory" precisely, or the clause protects nobody.
3. Option. You pay for the right to buy within a set period, often at a discount to the market value once consent is in. You carry the application cost and keep the choice to walk away.
4. Promotion agreement. A promoter wins the planning at its own cost and the land is sold with consent, with the proceeds shared. Mostly a landowner's tool, but it tells you how the seller's advisers think.
5. Joint venture. The landowner puts in the site, the developer puts in the work and the funding, and the profit is shared. It removes the land payment up front and aligns both sides on the outcome. We structure these through our joint venture property development service.

Every one of these lives or dies on the drafting. What counts as satisfactory permission, who pays for the application, what happens on appeal, and when the long-stop date falls are the questions that matter. Use a solicitor who does land deals every week.

Due diligence that kills deals

The appraisal tells you what a site is worth if everything in the pack is true. Due diligence finds out whether it is. The checks below are the ones that most often turn a good deal into no deal, or into a much lower price.

1. Title. Covenants, rights of way, ransom strips and leases. A strip of land you do not own between the site and the road can hold the whole scheme hostage.
2. Access. A legal right of access for construction traffic and for the finished use, not just a gate that is open today.
3. Rights of light. Neighbours' windows can limit the height and bulk of what you build, whatever the planners allow.
4. Services. Power, water, drainage and gas capacity. A substation or a sewer diversion can cost more than the profit on a small site.
5. Ground and contamination. Made ground, old tanks, asbestos and basements. The survey money spent here is the cheapest insurance in development.
6. Flood risk. A site in a flood zone changes the design, the insurance and sometimes the planning answer.
7. Vacancy and use history. How long a building has stood empty and what its lawful use is can move the planning obligations by six or seven figures.

At Allitsen Road in St John's Wood, a vacant former members' club on a corner plot was bought at auction without proper due diligence. Our feasibility study then tested four options, from a four-apartment conversion to a seven-apartment scheme, and we advised against the most expensive one.

The checks are cheaper before you own the building. See the Allitsen Road feasibility study and our development site due diligence checklist.

The negotiation: price, timing, exclusivity and overage

Price is only one of four things being negotiated. Sellers trade certainty, speed and their share of the future for money. A buyer who understands that can win a site without paying the most.

1. Price. Your ceiling is the residual land value from your own appraisal. Open below it, and show the seller the costed reasons rather than a bare number.
2. Timing. A short exchange and a defined completion are worth money to a seller with a lender or a deadline. Being ready to move is a bargaining chip.
3. Exclusivity. A lock-out period lets you spend on surveys without being gazumped. Pay for exclusivity with speed and seriousness, not with a higher price.
4. Overage. The seller may ask for a share of any uplift if you get a bigger consent later. Agree the trigger, the percentage base and the end date, or it will haunt the exit. Our guide to the overage clause explains the terms.

The buyers who get the best terms arrive with proof of funds, a costed appraisal and a short list of conditions. The buyers who lose arrive with an offer "subject to everything" and a lender who has not seen the site.

How we acquire sites for buyers

We work for the buyer, not the seller, on development schemes from £3M to £150M gross development value, in London and across the UK. Our development land and site sourcing service does the whole acquisition stage as your representative.

1. Deal flow. We are in the industry and active on projects, so off-market deals come to us. We already have deals on the table.
2. The numbers. We run the full appraisal and viability check, so you know the most you can pay before you offer.
3. The planning chance. Without consent, we advise on the odds. With consent, we check the numbers and the conditions as your representative.
4. The risks. Every one highlighted before you commit, from title to ground.
5. The terms. We negotiate on your behalf, and we structure the deal to fit your strategy.

After the purchase, the same team can take the scheme on through planning, design and construction. We have built since 2016, and our combined team experience includes £225M+ of land acquired and 10,000+ homes through planning.

What we ask of a buyer

Terms are agreed deal by deal: a fee basis, a percentage, or joining the deal alongside our other services. We ask serious buyers to have proof of funds, or funding in place, before they approach us. The checks below are the ones we run on every site first.

Land acquisition rewards the buyer who tests the site before the offer, not after. Looking for your first or next site? Tell us what you're looking for and we will say what we have and what it is worth.