A property can look like an excellent investment on paper. The asking price may appear attractive. The location may have strong fundamentals. There may be planning potential, an obvious refurbishment opportunity, or a development angle that appears capable of producing a healthy return. But an opportunity is not necessarily a good investment simply because the numbers initially look attractive.

Before committing significant capital, I believe the most important question is not:

“How much money could this make?”

It is:

“What would have to be true for this investment to work, and have I properly tested each of those assumptions?” That is where due diligence becomes critical.

For property investors, developers, land investors, high-net-worth investors and family offices, a robust assessment should look beyond the property itself. I t should examine the legal position,
planning potential, physical constraints, market, financial assumptions, exit strategy and importantly, the structure of the deal. This is where an independent assessment can add considerable value. The purpose is not to find reasons not to proceed. It is to establish whether the opportunity stands up when viewed from several different perspectives.

Here are the ten checks I believe matter before buying property or land.

1. The property itself

The first question is surprisingly simple:

What exactly are you buying?

The land or property property should be assessed beyond its photographs, brochure description and asking price.

For an existing building, this means considering its condition, accommodation, construction, layout, age, defects and potential future maintenance requirements.

For land, the question becomes more fundamental. What is actually included within the site?

The title plan, physical boundaries and marketing particulars should be compared. Areas of land that appear to form part of a site may not necessarily be included in the ownership.

Always consider whether the existing use is appropriate for the proposed investment strategy. For example, a tired commercial building may appear inexpensive because it is being compared with modern refurbished stock nearby. However, the apparent discount may disappear once refurbishment, professional fees, statutory requirements and a realistic contingency are
included.

The lesson: understand the asset before attempting to value the opportunity.

2. Planning and development potential

Planning potential can create substantial value, but it should never be treated as guaranteed value.

A site may appear capable of accommodating additional homes, an extension, conversion or a change of use. That does not mean planning permission will be granted.

The planning history, relevant local planning policies, surrounding development, site characteristics and any obvious planning constraints should be examined. For land investors, this is particularly important. A parcel marketed as having “development potential” may have no realistic route to planning. Conversely, land that initially appears constrained may have an opportunity that becomes apparent through more detailed investigation.

For example, a large garden may look capable of accommodating another dwelling. But access, overlooking, protected trees, local design policies, drainage, parking requirements or the relationship with neighbouring properties could make development considerably more difficult.

Planning should therefore be treated as a process of testing assumptions rather than simply identifying possibilities.

3. Title, ownership and legal rights

A property cannot be assessed properly without understanding what rights and restrictions come with it. Title investigations can reveal matters that materially affect value or development potential.

These may include restrictive covenants, easements, rights of way, lease arrangements, charges, overage provisions, ransom strips or unusual ownership structures.

For example, a piece of land may appear to have excellent development potential but have no legal right of access to the adopted highway. That can transform an apparently straightforward acquisition into a much more complicated proposition.

Ownership also needs to be established clearly. The person marketing an opportunity is not necessarily the person with the unrestricted legal right to sell it.

Legal due diligence is ultimately a matter for a suitably qualified legal adviser, but from an investment perspective, these issues should be identified early rather than after commercial terms have
already been agreed.

4. Access and highways

Access is one of the areas that can easily be overlooked during an initial inspection.

A site may be physically accessible but lack the legal rights required to use the route.

Alternatively, an existing access may not be suitable for the proposed development.

Questions can include:

• Who owns the access?
• Is there a legal right of way?
• Is the road adopted?
• Can emergency vehicles access the site?
• Is the width sufficient?
• Could visibility requirements affect the scheme?
• Would a new access require highways approval?
• Are there existing obligations or restrictions affecting the route?
  

Consider a field that appears to have a straightforward road frontage. If the usable access is actually through a neighbouring parcel and the legal position is unclear, the development risk could be significant.

Access is not simply about getting a car onto the site. It is about establishing whether the property has the legal and practical access required for its intended use.

5. Utilities and infrastructure

A development needs more than land. It needs infrastructure.

Water, electricity, gas, telecommunications, foul drainage and surface water drainage all need to be considered. The location of services matters, but so does capacity. A utility connection may be physically nearby but still require significant expenditure or infrastructure upgrades.

Drainage can be particularly important on development sites. A seemingly straightforward scheme can become more complicated if there are capacity constraints or if surface water cannot be
discharged in the assumed manner.

Therefore, it is important to establish as early as possible:

Where are the services, who provides them, what capacity exists and what will connection cost? The answer can materially change the viability of a project.

6. Physical and environmental constraints

The next question is:
What could physically prevent or complicate the proposed use?

Depending on the property and location, this could include flood risk, ground conditions, contamination, protected trees, ecology, topography, mining, radon, heritage considerations or environmental designations. The presence of a constraint does not automatically make a site unviable.

However, the cost and time associated with overcoming it need to be reflected in the appraisal.

For example, sloping land may still be developable, but abnormal foundation requirements, retaining structures, drainage solutions and changes in levels could significantly increase construction costs.

Therefore, it is important to distinguish between:

“Is it possible?”

and

“Is it commercially worthwhile?”

They are not always the same question.

7. The market

An investment should never be assessed solely by looking at comparable properties. The wider market needs to be understood. Who is likely to buy or rent the finished product? What are competing properties doing? How quickly are they selling? What price points have the strongest demand? For development, consider the likely purchaser profile, local supply, competing schemes and achievable values. For an investment property, rental demand, tenant profile, void assumptions and local competition may be more important.

A property can be bought below the asking price and still be a poor investment if there is limited demand for the finished product.

The market ultimately determines whether your assumptions have a realistic foundation.

8. The financial appraisal

Once the physical, legal, planning and market issues have been examined, the financial appraisal can become much more meaningful. This should include all relevant costs rather than simply:

Purchase price + construction cost = profit.

Depending on the strategy, the appraisal may need to include acquisition taxes, professional fees, planning costs, finance, interest, surveys, infrastructure, construction, contingencies, marketing,
disposal costs and holding costs.

It is good practice to stress-test the assumptions.

What happens if construction costs increase?

What happens if the programme takes six months longer?

What happens if the end value is lower than expected?

What happens if interest rates or finance costs change?

A scheme that only works under perfect assumptions is not necessarily a robust investment.

A stronger opportunity is one that still makes commercial sense when reasonable stress tests are applied.

9. The exit strategy

Before buying, always understand how the investment is expected to end.

Will the strategy be:

• Sell immediately after refurbishment?
• Sell individual units?
• Retain and refinance?
• Hold for rental income?
• Sell the completed development?
• Obtain planning permission and sell the land?
• Sell the property as an investment?
  

The exit strategy should influence the acquisition decision from the beginning and look at more than one exit strategy. For example, if a development relies on selling five high-value homes to achieve the projected return, then ensure you understand whether sufficient demand exists at that price point.

If the proposed strategy is to refinance and retain, the assumptions need to consider the likely lending position and future valuation.

An exit strategy is not something to decide after the purchase. It should be part of the investment case before the purchase.

10. The deal itself

Finally, look at the transaction. Sometimes the property is not the problem - the deal is.

The price, payment structure, conditionality, timing, warranties, overage arrangements, option agreements, leases, vendor motivations and contractual protections can all affect the risk being taken.

For example, a property may be worth £1 million, but paying £1 million today for an asset that requires substantial expenditure before its value can be realised may be very different from acquiring it for £850,000 with appropriate protections.

Equally, an apparently attractive discounted purchase may contain contractual terms that transfer disproportionate risk to the buyer.

Never look at price in isolation.

Look at what you are paying. What you are receiving. What you are taking responsibility for and what happens if the assumptions do not materialise.

A Practical Example

Imagine an investor is offered a parcel of land for £500,000.

The agent suggests that six houses could potentially be developed, with a projected gross development value of £2.4 million. At first glance, the numbers appear compelling.

But the due diligence reveals:

• The access is not straightforward.
• A restrictive covenant may affect development.
• The site has drainage constraints.
• Part of the site has significant level differences.
• The local market is weaker at the proposed sales values.
• Construction costs were understated.
• Professional and finance costs were excluded from the initial appraisal.
• The six-unit scheme is an assumption rather than an established planning position.
  

The £500,000 purchase price has not changed. What has changed is the investor’s understanding of the risk. That is the purpose of proper due diligence.

It does not necessarily mean walking away. It may mean renegotiating the price, changing the proposed scheme, restructuring the transaction, making the acquisition conditional on certain matters or deciding that the opportunity is not appropriate.

That is a much stronger position from which to make an investment decision.

Frequently Asked Questions

How long should property due diligence take?

There is no universal timeframe. A straightforward acquisition may be relatively quick, while development land or complex commercial property can require considerably more investigation.

The important point is that the timescale should reflect the complexity and risk of the transaction rather than the seller’s preferred timetable.

Should I carry out due diligence before making an offer?

Where possible, yes.

There will inevitably be information that can only be established after an offer is agreed, particularly during the legal process. However, preliminary due diligence before committing to a transaction
can prevent investors from spending substantial time and money pursuing an opportunity that fails basic tests.

Is planning permission enough to make development land a good investment?

No.

Planning permission is important, but it does not automatically make a project viable. Access, utilities, construction costs, abnormal costs, market demand, finance and achievable end values all need to be
considered.

Should an investor rely on the agent’s appraisal?

An agent can provide valuable marketi nformation, but an investment decision should not rely on one source. The agent is representing the property or transaction. An independent assessment provides another perspective and tests the assumptions behind the opportunity.

What is the biggest mistake investors make?

One of the most common mistakes is becoming emotionally attached to the perceived opportunity before properly testing it. Once an investor has decided that a property is attractive, there can be a tendency to look for information that confirms the original view.

Good due diligence does the opposite.

It actively tests the investment thesis.

Conclusion

The best property investments are not necessarily the properties with the most obvious potential.

They are often the opportunities where the investor has taken the time to understand what they are buying, what could go wrong, what the investment requires and whether the potential return properly
compensates for the risks involved.

That is why due diligence should be viewed as more than just a checklist. It is a decision-making process.

At CAA Third Limited, this is the thinking behind The Third Perspective: stepping back from the excitement of an opportunity and looking at it independently from the perspectives that matter
before capital is committed.

Sometimes that process confirms that anopportunity is worth pursuing.

Sometimes it identifies issues that can be resolved or negotiated.

And sometimes the most valuable conclusion is that the investment does not justify the risk.

All three are useful outcomes.

The objective is not simply to find a property or land to buy.

It is to understand the investment well enough to make a confident, informed decision about whether you should buy it at all.