Sell Your Phone Mast Lease: Mast Sales Advice for UK Landlords

What is a phone mast lease sale?

A phone mast lease sale, sometimes called a mast sale or a telecoms lease buy-out, is where the landowner sells the right to receive the rent from a mast site in exchange for a one-off capital payment. The buyer is usually a specialist infrastructure investor or fund that owns hundreds of similar sites. In most deals the buyer takes a long lease of the mast site from you, or an assignment of the benefit of the existing agreement, and then collects the rent from the operator for the rest of the term.

You keep the freehold of your land. What changes is who receives the mast income, for how long, and what rights the buyer holds over the site in the meantime. Those three points decide whether a sale is a good deal.

How much is a phone mast lease worth to sell?

A buyer is paying today for income it expects to collect over many years, so offers are normally expressed as a multiple of the current annual rent. The multiple moves with the factors below, which is why two sites paying the same rent can attract very different offers:

• ✓The rent itself, and how it is reviewed: fixed, index-linked (RPI or CPI), or open market
• ✓The unexpired term of the operator's agreement and the likelihood it is renewed
• ✓Whether the agreement is protected by the Landlord and Tenant Act 1954 or sits under the Electronic Communications Code, and what that means for rent at the next renewal
• ✓The operator, whether the site is shared by more than one network, and the type of site: rooftop, greenfield, or an unusual structure
• ✓Any redevelopment potential in the land, which a buyer will want to restrict and you will want to protect

Since 7 April 2026, leases that renew under the 1954 Act are valued on the Code’s no-network basis, so the rent you receive today is not a reliable guide to the rent a buyer can expect after the next renewal. A proper valuation models the realistic future income under the current rules and then tests the offer against it.

Should I sell my phone mast lease or keep the rent?

There is no single right answer. Selling tends to make sense when:

• ✓You would rather have capital now than income over 10 to 20 years
• ✓Your rent is exposed to a Code-based reduction at renewal and you want certainty
• ✓The sale fits wider estate, succession, or tax planning (take tax advice on the capital versus income treatment)

Keeping the rent tends to make sense when the income is secure and index-linked, when you may redevelop the land within the buyer’s proposed term, or when the offer simply undervalues the site. We will tell you plainly which side of that line your site falls on.

Risks to watch in a mast sale agreement

The price is only half of the deal. The document a buyer sends is drafted in the buyer’s favour, and these are the clauses that most often cost landowners money later:

• ✗Term: buyers commonly seek a lease of several decades; the longer the term, the longer your land is tied up
• ✗Redevelopment: without a break clause or a lift and shift right, a sale can block building plans for the life of the buyer's lease
• ✗Extra rights: the buyer should not acquire wider access, sharing, or upgrade rights over your retained land than the operator already holds
• ✗Renewal risk: be clear who carries the risk if the operator renews at a lower Code rent or leaves the site altogether
• ✗Costs: check who pays legal fees, any VAT or stamp duty land tax position, and what happens if the deal does not complete

How our mast sale service works

1. Free valuation review

We review your agreement and any offer you have received, and give you a realistic view of what the lease is worth under the current rules before you commit to anything.

2. Competitive marketing

One offer is a starting point, not a market. We approach the specialist buyers active in the UK so that your site is priced by competition rather than by whoever wrote to you first.

3. Negotiating price and terms together

We negotiate the lump sum and, just as importantly, the term, break rights, redevelopment protection, and the limits on what the buyer can do with the site.

4. Completion with your solicitor

We work alongside your solicitor through to exchange and completion so that the commercial deal we agreed is the deal that appears in the final document.

Our fees

The initial consultation and valuation review are free and without obligation. Our fees for a sale are structured on an incentivised basis, which we explain in full once we have reviewed your site and the offers available. We act exclusively for landowners and never for operators or buyers.

Mast sales: frequently asked questions

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This page was last updated on 3 September 2026. It is general guidance for landowners and does not constitute legal, tax, or valuation advice for a specific site. Please contact us for advice on your circumstances.

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