The House Renovation Process, Stage by Stage

Last updated: August 2026 · Verified against current UK building regulations and London planning practice.

What order does a house renovation actually happen in?

Quick answer: A full house renovation runs in a fixed sequence: survey and design, then consents, then on site — strip-out, structural work, first fix, plastering, second fix, decoration and snagging. The order is not a builder's preference; each trade physically seals in the work of the trade before it, so a late change means undoing finished work. Investigation and design happen before pricing, and your kitchen, bathroom and electrical decisions are due before first fix — not at the end.

Most renovations that go wrong don't fail on site — they fail in the sequencing. Homeowners in Victorian terraces across Haringey and Islington, or 1930s semis in Enfield and Barnet, often start by ringing builders for prices, when the honest answer at that stage is that nobody yet knows what the job is. This guide sets out the order a whole-house renovation follows, why that order never changes, and what you need to decide at each point along the way.

Why do survey and design come before any pricing?

Because a price set before investigation is a guess dressed up as a commitment. A measured survey records what the house actually is; opening-up investigations — lifting floorboards, checking joist condition, testing for damp, dating the wiring and pipework — record what it's hiding. In a 120-year-old Haringey terrace, the difference between assumed and actual condition is where mid-build "extras" come from. Finding it in week one of design costs a drawing revision; finding it in week six of the build costs a variation, a delay and an argument.

Design then turns that knowledge into a buildable, priceable scheme. Our own architect team produces the drawings and specifications the project is priced and built from, and our structural engineer runs the calculations for any wall removals, steels or chimney breast work. Only once that package exists can any builder give you a figure worth relying on — because only then does everyone agree on what's being built.

What needs planning permission — and what only needs Building Regulations?

Less than most people expect needs planning permission. Internal renovation work — new kitchens and bathrooms, wall removals, rewiring, replumbing, reconfiguring rooms — usually needs no planning consent at all, because planning controls external change: extensions, altered rooflines, new openings in elevations. Conservation areas, common across boroughs like Barnet and Enfield, restrict external changes only, though an Article 4 direction can tighten that. Listed buildings are the exception — listed building consent is separate and always required before altering one, inside or out.

Building Regulations, by contrast, apply regardless of whether planning does. Structural alterations, electrics (Part P), plumbing, insulation upgrades and fire safety all fall under them, and each needs sign-off from building control. Separately, structural work on a wall you share with a neighbour — removing a chimney breast, bearing a new steel into the party wall — triggers the Party Wall Act, with a two-month notice period before that work can start; our party wall guide covers the process, including the £1,000–£2,500 per affected neighbour that surveyors typically cost if a neighbour dissents. If your renovation includes an extension, add a householder planning application (£548 plus the £91.02 Planning Portal charge) and its 8-week decision period to the programme.

What happens on site — and why is the order fixed?

The build sequence exists because each stage covers up the one before it. Plaster seals cables and pipes into the walls; decoration seals the plaster; fitted kitchens seal the floor beneath them. Run the stages out of order and you end up cutting open finished work to reach something that should have gone in earlier. Here is the sequence, what each stage involves, and the decisions that must already be made when it starts.

Stage	What happens	Your decisions due
Strip-out	Old kitchens, bathrooms and finishes removed; floors lifted; true condition of the structure confirmed	Final scope agreed; anything to salvage or protect flagged
Structure	Walls removed or built, steels installed, damp and timber repairs, new floor structures	Structural drawings signed off; party wall notices served two months earlier where needed
First fix	Wiring, pipework and ductwork run through open walls and floors	Kitchen and bathroom layouts, socket and switch positions, lighting plan, underfloor heating
Plastering	Boarding and skim coat seal all services into the walls and ceilings	None — changes from here mean cutting open finished surfaces
Second fix	Kitchen fitted, sanitaryware installed, sockets and switches on, doors and skirting hung	Tiles, worktops, flooring and ironmongery chosen and ordered weeks before
Decoration	Mist coats, final paint, floor finishes laid	Colours and finish specifications
Snagging	Joint inspection, corrections, certificates and sign-offs handed over	Snagging list agreed; final payment released on completion per the contract

When are your decisions actually due?

The single most common cause of renovation delay is a decision arriving after the stage that needed it. Kitchens and bathrooms are the clearest case: the plumber and electrician set pipe runs and cable positions during first fix to match your unit run, hob position and sanitaryware — so the layouts must be final before first fix begins, and the products themselves ordered early enough to arrive before second fix. The same logic applies to glazing, which can carry the longest lead time on the whole job.

The useful reframe is that decisions have a schedule, not a mountain. You are never choosing everything at once; you're choosing layouts before first fix, finishes before second fix, and colours before decoration. A competent contractor gives you that schedule with dates at the start, so each choice arrives when it's needed and no earlier.

How should payments track the build?

Payments should follow completed stages — you pay for work after it exists, valued against the itemised quote, not in large sums ahead of it. A staged schedule tied to the sequence above (strip-out and structure complete, first fix complete, plastered, second fix complete, practical completion) keeps the money and the work in lockstep, and means neither side is ever heavily exposed. Our guide to deposits and stage payments sets out what a fair schedule looks like and the warning signs of a front-loaded one.

Should you live in the house or move out?

It depends on scope. A whole-house renovation with a rewire and new heating means no reliable power, water or heat for stretches of the programme, plus dust that no amount of sheeting fully contains — in a Victorian terrace with one staircase and no side access, living through it is genuinely hard. Moving out usually shortens the programme, because trades work unimpeded and don't spend each Friday making the house habitable for your weekend.

Phased working — living in one half while the other is done — is realistic in larger 1930s semis with separable floors, but it adds duration and cost to the programme rather than saving it. Weigh the expense of temporary accommodation against the weeks it saves on site, and decide before the programme is written, not after. For a full picture of how we run whole-house projects — design, consents and build under one fixed, itemised price — see our house renovation service page.

Frequently asked questions

Do I need planning permission to renovate inside my house?
Usually not — planning permission controls external changes, extensions and listed buildings. Internal reconfiguration, new kitchens and bathrooms and rewiring generally need no planning consent, but Building Regulations approval still applies to structural, electrical, plumbing, insulation and fire safety work. Listed buildings always need listed building consent, inside and out.

How long does a full house renovation take?
Design and investigation typically take a few weeks; consents run alongside where needed (an extension adds an 8-week planning decision period); the build itself is measured in months, with strip-out to plastering roughly the first half. The honest answer comes from a programme written against your specific scope, which we produce with the quote.

What does a house renovation cost?
Every project is different, which is why we don't publish rates — each one gets a fixed, itemised quote after a free site visit, so you see exactly what every stage costs before committing. For orientation on how extension and renovation pricing is built up, see the cost guide.

When do I need to choose my kitchen?
Before first fix. Pipe and cable positions are set to match your final kitchen layout, so the layout must be signed off before the plumber and electrician start, and the kitchen itself ordered early enough to arrive for second fix.

Can I change my mind mid-build?
Yes, but the cost of a change depends entirely on when it lands. Moving a socket during first fix is minutes; moving it after plastering means cutting open a finished wall. Any change should be priced and agreed in writing as a variation before it's built.

Do I need a party wall agreement for internal work?
Only if the work is structural on a wall shared with a neighbour — removing a chimney breast or bearing a steel into the party wall, for example. That requires a two-month notice under the Party Wall Act before the work starts, so serve notices during the design stage. Ready to talk through your project? Book a free site visit.