Power of Attorney (POA) is a legal arrangement that allows someone to act on behalf of another person in managing their financial or medical affairs. When it comes to property, this authority includes the ability to buy or sell a home on someone else’s behalf—if the correct procedures are followed.

But what does selling a house under Power of Attorney really involve? Are there restrictions? And what must you do to ensure the transaction is valid, legal, and problem-free?

In this comprehensive guide, we’ll explain how Power of Attorney works in the context of property sales, outline the responsibilities of the appointed attorney, and walk through the legal and practical steps required to complete a sale successfully.

What Is Power of Attorney?

Power of Attorney is a legal document that gives one person (the attorney) the authority to act on behalf of another person (the donor) in legal, financial, or health-related matters. In the UK, there are different types of POA, and not all allow the sale of property.

The two main types relevant to property transactions are:

Ordinary Power of Attorney

  • Only valid while the donor has mental capacity
  • Typically used for temporary situations (e.g. if the donor is abroad)
  • Allows the attorney to manage specific affairs, including property

Lasting Power of Attorney (LPA) – Property and Financial Affairs

  • Can be used when the donor has mental capacity and continues if they lose capacity
  • Covers the management of bank accounts, bills, pensions, and property
  • Must be registered with the Office of the Public Guardian before it is valid

There is also a Health and Welfare LPA, but this does not authorise property transactions.

Can an Attorney Legally Sell a House?

Yes, provided the Power of Attorney:

  • Is the correct type (i.e. covers property and financial affairs)
  • Has been properly executed and registered (particularly for an LPA)
  • Is still valid (the donor is alive and the POA has not been revoked or limited)
  • Does not contain any restrictions or conditions that prevent a sale

An attorney can legally sign contracts, instruct solicitors, and complete a property sale on behalf of the donor, whether or not the donor still has mental capacity.

When Might You Need to Sell a House Using Power of Attorney?

There are several common scenarios where selling a house using Power of Attorney might arise:

  • The donor is elderly or unwell and has moved into care
  • The donor has lost mental capacity and can no longer manage their affairs
  • The donor lives abroad and cannot handle the sale directly
  • The donor has appointed someone to manage their property and finances for convenience

In all cases, the attorney must act in the best interests of the donor and follow the powers granted in the POA document.

Responsibilities of the Attorney

Acting as an attorney comes with serious legal duties. When selling a property under Power of Attorney, the attorney must:

  • Act in the donor’s best interest
  • Keep the donor’s finances separate from their own
  • Avoid conflicts of interest or personal gain
  • Maintain clear records and receipts
  • Ensure that the donor receives fair market value for the property
  • Use proceeds of the sale solely for the benefit of the donor

If the attorney fails in these responsibilities, they can be investigated by the Office of the Public Guardian and may face legal consequences.

What Documents Are Needed to Sell a House Under POA?

To sell a property on behalf of someone else using Power of Attorney, the following documents are typically required:

  1. The registered Power of Attorney document
  2. ID and proof of address for the attorney
  3. Proof of the donor’s ownership of the property
  4. A capacity assessment (if the donor lacks capacity) – not always essential but sometimes requested by solicitors
  5. Any restrictions or conditions in the POA document

If you’re using an LPA, it must be officially registered with the Office of the Public Guardian (OPG). You will need the original or a certified copy of the POA to proceed.

Steps to Selling a House with Power of Attorney

Here is a step-by-step overview of how to carry out a property sale using Power of Attorney in the UK:

Step 1: Check the Validity of the POA

Confirm that:

  • The POA document is registered with the OPG (for LPAs)
  • The POA explicitly grants permission to handle property matters
  • There are no expiry dates, restrictions, or limitations on property sales
  • The donor is still alive (POA becomes void upon death)

Step 2: Instruct a Solicitor

Choose a conveyancing solicitor experienced in handling sales involving POA. Provide them with:

  • The POA document (original or certified copy)
  • Your identification documents
  • Details of the donor and the property

The solicitor will check the POA’s validity and ensure all legal requirements are met before contracts are issued.

Step 3: Secure Property Valuation

Obtain an independent market valuation to ensure that the sale price is fair and justifiable. This is important for protecting both the donor’s financial interests and your legal position as attorney.

Valuations from at least two estate agents are advisable, and you should retain records for transparency.

Step 4: Market the Property and Accept an Offer

The property can now be marketed, either through an estate agent or via private sale. Once a buyer is found, offers can be negotiated on the donor’s behalf.

All negotiations and decisions must be made with the donor’s best interests in mind—not your own.

Step 5: Exchange Contracts and Complete the Sale

Once contracts are ready and a completion date is agreed:

  • You will sign all legal documents on behalf of the donor, referencing your authority as attorney (e.g. “John Smith, attorney for Jane Doe”)
  • Funds will be transferred to the donor’s account or a dedicated account under their name
  • You must keep full financial records and ensure the funds are used appropriately

The solicitor may also draft a statement explaining your role and confirming that you have the legal right to act.

Special Considerations for Selling a House with POA

There are some additional issues to be aware of during the sale:

Selling to a Family Member or Yourself

Selling the donor’s property to yourself or a family member is not prohibited, but it does raise serious legal concerns.

  • It must be done transparently and at full market value
  • You may need to apply to the Court of Protection to avoid conflicts of interest
  • The solicitor will likely require a formal valuation and independent legal advice for all parties involved

Failure to manage this correctly can lead to accusations of misconduct or abuse of power.

Donor in Care or Receiving Benefits

If the donor is in residential care, selling their home may affect their eligibility for means-tested benefits or care fee assessments. The proceeds from the sale may be counted as capital.

Before proceeding, speak to a financial adviser or social worker to understand the implications.

Leasehold Properties and Managing Agents

If the property is leasehold, you may need to liaise with managing agents or freeholders. Some require additional paperwork or permissions during a sale. Ensure these are addressed early in the process.

Can You Sell the House If the Donor Has Lost Capacity?

Yes. If the Power of Attorney is a Lasting Power of Attorney for Property and Financial Affairs and has been registered with the Office of the Public Guardian, it remains valid even if the donor has lost mental capacity.

However, you must act in accordance with the Mental Capacity Act 2005, including:

  • Acting in the donor’s best interests
  • Involving the donor as much as possible in the decision (even if they lack full capacity)
  • Avoiding unnecessary sales if alternative options exist

Solicitors may request a written statement confirming that the donor lacks capacity and that the sale is appropriate.

Can a Property Be Sold After the Donor Has Died?

No. Power of Attorney ends immediately upon the death of the donor. From that point, the Executor of the estate (as named in the Will) or an Administrator (if there is no Will) takes over responsibility.

The executor or administrator will need:

  • A Grant of Probate (or Letters of Administration)
  • A copy of the death certificate
  • Solicitor involvement to handle the sale as part of the estate administration

Any attempt to sell a property under POA after the donor has passed away is invalid and could constitute fraud.

What If There’s No Power of Attorney?

If the donor has lost mental capacity and there is no POA in place, you cannot legally sell the property on their behalf. In this case, you will need to:

  • Apply to the Court of Protection to become a Deputy
  • This process can take several months and involves court fees and assessments
  • Once appointed, a Deputy can manage the donor’s financial affairs, including property sales

Planning ahead and putting a Power of Attorney in place while the donor still has capacity is always advisable.

Final Thoughts

Selling a property using Power of Attorney is entirely legal and manageable—provided you follow the correct procedures and act responsibly. Whether you’re selling a relative’s home due to illness, relocation, or care needs, you have a duty to act in their best interests, keep thorough records, and ensure the sale is handled with integrity.

By confirming the Power of Attorney is valid, working with a solicitor, and communicating openly with all parties involved, you can complete the sale smoothly and lawfully.

If you’re unsure at any stage, seek professional legal advice. Power of Attorney is a powerful tool—but one that must be used carefully and correctly.