Do optional extras on a new-build home count towards SDLT?

Introduction

Buyers of new-build homes often ask whether optional extras offered by the developer are included in the price for Stamp Duty Land Tax (SDLT). This matters because even a relatively small upgrade bill can increase the chargeable consideration and, in some cases, push the purchase above an SDLT threshold or remove eligibility for First-Time Buyer relief.

The key issue is whether the extra is part of the land transaction. In practice, that usually means asking whether the item is a fixture forming part of the property, or a chattel that remains a moveable item.

The Question

A buyer of a new-build dwelling wanted to know whether various optional extras offered by the developer would count towards SDLT. The items under consideration included upgraded flooring, carpets, extra electrical sockets, additional tiling, a fitted shower, and integrated kitchen appliances. The concern was that choosing the extras before completion might increase the purchase price above a relevant SDLT threshold.

Nick’s Explanation

Nick’s explanation was that SDLT is charged on the “chargeable consideration” given for the land transaction, and that money paid for items forming part of the property at completion is generally included.

In anonymised form, his reasoning was:

• Fixed flooring is usually part of the land and included.
• Carpets are usually treated as chattels and excluded.
• Extra sockets are part of the building and included.
• Additional tiling fixed to walls or floors is included.
• A shower plumbed in and fixed to the wall is included.
• Integrated kitchen appliances are generally included, while free-standing appliances are usually excluded.

He also explained the practical effect: if a buyer agrees to pay the developer for fixtures before completion, that amount is normally added to the chargeable consideration for SDLT purposes.

The Law

The starting point is Finance Act 2003.

• Section 43(1) Finance Act 2003: “In this Part a ‘land transaction’ means any acquisition of a chargeable interest.”
• Section 48(1) Finance Act 2003: “In this Part ‘chargeable interest’ means— (a) an estate, interest, right or power in or over land… or (b) the benefit of an obligation, restriction or condition affecting the value of any such estate, interest, right or power, other than an exempt interest.”
• Section 50(1) Finance Act 2003: “Schedule 4 makes provision as to the chargeable consideration for a transaction.”
• Schedule 4, paragraph 1 Finance Act 2003: “The chargeable consideration for a land transaction is any money or money’s worth given for the subject-matter of the transaction, directly or indirectly, by the purchaser or a person connected with him.”

These provisions mean SDLT is charged on what is given for the subject matter of the land transaction. If the payment is for the property itself, including items that have become part of it, the payment is usually chargeable consideration. If the payment is genuinely for separate moveable items, it may fall outside the SDLT calculation.

That distinction broadly follows the familiar property law divide between fixtures and chattels:

• A fixture is something attached to the land or building so as to become part of it.
• A chattel is a moveable item that does not form part of the land.

Analysis

The safest way to analyse developer extras is to ask, item by item, whether the buyer is paying for part of the completed dwelling or for a separate moveable item.

Step 1: Identify what is being supplied before completion

If the developer installs the item as part of the build before legal completion, there is a strong argument that the buyer is paying for part of the completed property.

Step 2: Decide whether the item is a fixture or a chattel

• Hard flooring fixed to the property, such as fitted vinyl or similar flooring, will usually be treated as part of the building. That points towards inclusion in SDLT.
• Carpets are more commonly treated as moveable items. That points towards exclusion, assuming the price attributed to them is genuine and reasonable.
• Extra sockets, wiring and electrical points are part of the fabric and services of the building. They are usually included.
• Tiling fixed to walls or floors is part of the finished dwelling and is usually included.
• A shower that is plumbed in and wall-mounted is typically a fixture and usually included.
• Integrated appliances are more likely to be treated as fixtures because they are built into the fitted kitchen. Free-standing appliances are more likely to be chattels.

Step 3: Consider how the contract and pricing are structured

If the contract with the developer treats the extras as part of the purchase of the dwelling, that supports inclusion. Even if there is a separate extras list, SDLT can still apply if the payment is really for items forming part of the property at completion.

Step 4: Check whether the extra payment affects a relief or threshold

This is often the real issue. A buyer may be close to a threshold for SDLT or for First-Time Buyer relief. If included extras increase the chargeable consideration above that threshold, the SDLT outcome can change significantly.

For example, if the agreed purchase price is £500,000 and the buyer then adds £5,000 of fixed flooring and other fitted upgrades before completion, the chargeable consideration may become £505,000. If that takes the transaction above the relevant limit for a relief, the relief may be lost.

Step 5: Distinguish post-completion works from pre-completion extras

If the buyer completes the purchase first and later arranges separate works independently, that is usually a different position. SDLT is concerned with the chargeable consideration for the land transaction at completion. Works commissioned and paid for later, under separate arrangements, may not form part of that land transaction. However, the facts and paperwork still matter.

Outcome

In general, optional extras on a new-build home are included in SDLT if they are fixtures forming part of the property at completion. This usually includes fitted flooring, tiling, extra sockets, plumbed-in showers and integrated appliances.

Items that remain chattels, such as carpets and many free-standing appliances, are usually not included.

The practical takeaway is that developer upgrades can increase the chargeable consideration and may affect the SDLT bill or entitlement to reliefs.

Practical Steps

If you are assessing your own position, it helps to work through the following:

1. Get a full written list of all extras offered by the developer.
2. Identify which items will be physically fixed into the property before completion.
3. Separate those from genuinely moveable items.
4. Review the reservation paperwork, sale contract and extras paperwork to see how the sums are described.
5. Calculate SDLT both with and without the disputed extras.
6. Pay particular attention if your purchase price is close to a threshold for SDLT or First-Time Buyer relief.
7. If necessary, ask for a clear item-by-item SDLT analysis before exchange or completion.

Where the numbers are close, timing can matter. Buyers sometimes decide not to take certain fitted extras from the developer and instead carry out equivalent works after completion, but that should only be assessed by reference to the actual contractual arrangements.

Conclusion

For SDLT purposes, the main question is whether the optional extra forms part of the land transaction. If it is a fixture installed as part of the new-build property before completion, it will usually be included in chargeable consideration. If it is a genuine chattel, it will usually be excluded. That distinction can make a real difference where the purchase price is close to an SDLT threshold or relief limit.

Legal References Used

• Finance Act 2003, section 43(1)
• Finance Act 2003, section 48(1)
• Finance Act 2003, section 50(1)
• Finance Act 2003, Schedule 4, paragraph 1

This page was last updated on 22 March 2026.

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