Moving costs stamp duty, agent fees, legal fees on both sides, survey, removals and the inevitable spend on the new place — none of which adds anything to the property you leave. A loft conversion costs the build and some months of disruption, and leaves you in the same place. Converting usually wins financially; moving wins when the location itself is the problem.
- Add up every moving cost before comparing. The asking-price difference is not the comparison.
- Stamp duty is usually the largest single item and it buys you nothing.
- Converting keeps your schools, neighbours and commute — which is often the real point.
- If the location or the plot is the problem, no amount of building fixes it.
What moving actually costs
| Item | Who to | Note |
|---|---|---|
| Stamp duty | HMRC | Usually the largest single item; buys nothing |
| Estate agent fee | Agent | Percentage of your sale price |
| Conveyancing — sale | Solicitor | Plus disbursements |
| Conveyancing — purchase | Solicitor | Plus searches and Land Registry |
| Survey on the new property | Surveyor | Level depends on the property |
| Mortgage arrangement and valuation | Lender | Where applicable |
| Removals | Remover | More than people expect over distance |
| Storage, if chains do not align | Storage firm | Common and rarely budgeted |
| The new place | Everything | Nobody moves and changes nothing |
The last row is the one consistently left out. Decorating, carpets, curtains, a kitchen that is not quite right — moving almost always triggers spending on the new house, and it is a real part of the comparison.
The comparison that actually matters
People compare the price of a bigger house against the price of a conversion, and that is the wrong sum.
The right one: take the total cost of moving — every row above, including the difference in purchase price and the spend on the new place — and set it against the total cost of converting, including fees, Building Control and contingency.
Our published figures put a loft conversion at £25,000–£65,000 depending on type. Moving to a house with one more bedroom in the same area typically costs the price difference plus a five-figure sum in transaction costs that produces nothing physical.
For most people in a house they otherwise like, converting wins on that arithmetic, and often by a substantial margin.
What the arithmetic does not capture is that converting means months of disruption in your own home, while moving means one difficult week and then it is done. That is a genuine factor and it is personal rather than financial.
When moving is clearly the right answer
- The location is the problem. Schools, commute, neighbours, the road, the area. No amount of building changes any of it.
- The plot is the constraint. No loft worth converting, no garden to extend into, nowhere for the stairs to go.
- You are at the street ceiling. Spending past what your road achieves is money you will not recover.
- You need the space now. A conversion is months away; a purchase can be weeks.
- You want a different kind of house, not a bigger version of this one.
- The house has fundamental problems — structural, damp, a bad layout you cannot unpick — that converting does not address.
- You cannot face living through it, which is an entirely legitimate reason.
When converting is clearly right
The mirror image, and it describes more households than people assume.
You like where you live. The schools work, the commute works, you know the neighbours. The house suits you except that it is one room short. The loft has the head height and a sensible place for the stairs. And your house is not already at the top of what the street achieves.
In that situation you are buying a bedroom for less than the transaction costs of moving would be on their own, and you keep everything that made you want to stay.
There is a third option worth pricing alongside both: a smaller intervention. Sometimes the problem is not a missing bedroom but a badly arranged ground floor, and opening up two rooms or converting a garage solves it for a fraction of either option. We would rather point that out than build the larger thing.
Things to check before committing to converting
- Head height. Measure from the floor joist to the ridge underside. Around 2.2m to 2.4m is what you want, because insulation and the new floor consume height.
- Roof type. A traditional cut roof converts readily; a trussed roof needs steels and a new floor before the trusses come out, which costs more.
- Where the stairs go. If the only compliant position takes an existing bedroom, you have swapped a room rather than gained one.
- The street ceiling. Look at sold prices for the best houses on your road.
- Permitted development. Volume allowance against what has already been added.
- The water tank. Usually has to move, often meaning a heating system change.
The published figures
These are the loft conversion figures published across this site:
| Job | Typical Coventry guide price | Notes |
|---|---|---|
| Velux / rooflight conversion | £25,000–£35,000 | Simplest type |
| Dormer conversion | £35,000–£50,000 | Adds head height & space |
| Hip-to-gable | £45,000–£65,000 | End-of-terrace / semi |
| Average loft conversion | ~£35,371 | Type & extras dependent |
Add design and structural fees, Building Control, party wall costs where applicable, and contingency — then set the total against every row in the moving table above, not against the asking-price difference alone.
We will tell you honestly whether your loft is worth converting, including when the answer is that it is not and you should move.
Frequently asked questions
Is it cheaper to convert the loft or move house?
Usually converting, once you count every moving cost rather than just the price difference. Stamp duty, agent and legal fees on both sides, survey, removals and the inevitable spend on the new place together form a five-figure sum that produces nothing physical. A conversion at least leaves you with a room.
What costs do people forget when moving?
Stamp duty is the big one and it buys nothing. Then agent fees, conveyancing on both the sale and the purchase, searches, survey, mortgage fees, removals, and storage if the chain does not align. Most consistently forgotten is the spend on the new house — nobody moves and changes nothing.
When should I move rather than convert?
When the location is the problem, when the plot physically cannot take what you need, when you are already at the ceiling price for your street, when you need the space urgently, or when the house has fundamental problems a conversion does not address. Not being able to face living through the work is also a fair reason.
Does a loft conversion always add value?
Usually, because an extra bedroom moves the house into a different search bracket, and loft conversions are among the better returns available. The limit is the ceiling for your street — if your house is already near the top of what the road achieves, the uplift will not follow the spend.
How do I know if my loft can be converted?
Three things decide it: head height, measured from the floor joist to the ridge underside and ideally around 2.2m to 2.4m; the roof type, since a trussed roof needs more structural work than a traditional cut roof; and whether a compliant staircase can be fitted without losing an existing room.
Is there a middle option?
Often. Sometimes the problem is not a missing bedroom but a poorly arranged ground floor, and opening up two rooms, converting a garage or a modest single-storey extension solves it for a fraction of either option. Worth pricing before committing to the larger project.
An honest answer, including when it is no
We will tell you whether your loft is viable and whether it is worth doing, including when the right advice is to move or to do something smaller.