Below is a plain-English breakdown so you know what your money buys, what pushes the price up, and how to get a figure you can actually plan around.
What does a loft conversion cost by type?
The biggest single factor is the type of conversion, because it decides how much new structure you are adding. Here is a simple guide to help you set a realistic budget.
These are guide prices for North London in 2026. Your own quote will reflect your roof shape, the room layout you want and the finish you choose.
What is included in the price?
A fair quote should cover far more than just the build. In our North London loft conversions, a typical fixed price includes structural work, the staircase, insulation, plastering, electrics, plumbing for an en suite where wanted, windows, and a decorated finish ready to use.
Things that sit outside the base price, and are worth asking about early, include:
- Bespoke fitted wardrobes or joinery
- High-end bathroom fittings and tiling
- Any planning application fees, where planning is needed
- Party wall agreements with neighbours
Marian handles our quotes, and the aim is always clear pricing with no hidden fees, so you know the full picture before anything starts.
What makes a loft conversion cost more?
Two homes on the same street can end up with different prices, and it usually comes down to a handful of things:
- Head height: if there is not enough height, the roof may need raising, which adds cost.
- Access: a tight staircase position or awkward access can add labour time.
- Bathrooms: adding an en suite means extra plumbing and waterproofing.
- Finish level: standard, mid or premium fittings change the total noticeably.
- Planning: mansards, front dormers and conservation areas often need a planning application.
Is a loft conversion worth the money?
For most North London families, yes. A loft is usually the cheapest way to add a proper double bedroom and bathroom without the disruption and cost of moving. If a dormer suits your home, our dormer loft conversion page explains that option in detail.
Kev Construct Ltd has been a Checkatrade member since 2019 and holds a 9.67/10 rating from 50+ verified reviews, so you can see the standard of work before you commit.
Get your free fixed-price quote and we will give you an honest figure for your home, with no pressure.
FAQ
How much does a small loft conversion cost?
A simple Velux (rooflight) conversion starts at around £30,000 as a 2026 North London guide, where the loft already has enough head height and no major structural change is needed.
Can I get a fixed price rather than an estimate?
Yes. We offer free estimates and can provide a clear fixed-price quote once we have seen your loft, so there are no surprises later.
Ready to talk numbers for your own home? Read the full breakdown on our loft conversions page, or get a free fixed-price quote and we will set out an honest figure with no hidden fees.
