There is no reliable single price for a full house renovation in North London, and this guide does not offer one. The cost depends on the condition of your house, the work you choose and what each quote actually covers. Before you settle on a figure, define the scope clearly, list every cost that sits outside the building work and make sure that each quote you compare describes the same project.
Start with a written scope
A budget is only as accurate as the description behind it. Before asking for prices, write down what you want done, room by room. A useful scope covers:
- layout changes, including any walls to be removed or openings to be formed
- structural work that may need an engineer, such as new beams or repairs to floors and roofs
- services, including wiring, plumbing, heating and drainage
- kitchens, bathrooms and other fitted rooms
- plastering, joinery, flooring and decoration
- external work, such as windows, doors, roofs and garden walls
The clearer the scope, the less room there is for different builders to price different jobs.
Separate building work from your own purchases
Many homeowners buy some items themselves, such as kitchen units, appliances, sanitaryware, tiles or flooring. Decide early who supplies each item. Where you are buying, keep those costs in their own budget line. Where the builder supplies them, ask for a stated allowance or a named product so that you can see what the price assumes.
Allow for fees and approvals
Some work needs approvals that are separate from each other. Historic England explains that planning permission, listed building consent and building regulations approval are different types of permission, and an older home may need more than one. Building regulations can apply to work such as replacing windows, heating systems or roof coverings. Include design, engineering and approval costs in your budget rather than assuming the builder has priced them.
Check how VAT is presented
VAT applies to most building work on existing homes, but GOV.UK sets out some exceptions where conditions are met, such as certain conversions or renovating an empty house. Do not assume an exception applies to your project. Ask each builder to state clearly whether their price includes VAT, so that you are comparing totals on the same basis.
Plan for unknown work
Opening up an older house can reveal problems that nobody could see at the quoting stage, such as decay, damaged services or hidden structural defects. Ask how each builder will report unexpected work, how it will be priced and when your agreement is needed before it goes ahead. Keep a contingency in your own budget sized to the age, condition and scope of your house, and discuss it with your designer or surveyor.
Compare quotes like for like
Citizens Advice recommends getting written quotes from at least three traders and treating a much lower price with caution, as it may not cover the same work. A useful quote should include:
- a fixed total price rather than a daily rate
- a breakdown of the work and materials, with separate costs
- how long the price is valid for
- whether VAT is included
- when the price can change, such as when you agree to extra work
Before you accept, check the builder's insurance and your own buildings insurance, and agree a written contract covering timings, materials, tidying up and staged payments.
Next step
If you are planning a full house renovation in North London, a clear written scope is the best starting point for a quote you can compare with confidence.
