Full Home Renovation: What's Involved from Start to Finish

A full home renovation is one of the most rewarding projects you can take on — and one of the most complex. Whether you've bought a fixer-upper in Christchurch, inherited a dated property, or simply want to bring a tired home up to modern standards, understanding what's involved at each stage helps you plan properly, budget realistically, and avoid the kind of surprises that blow timelines and bank balances.

I've run dozens of whole-house renovations across Dorset, and the process follows a broadly similar pattern every time. Here's what actually happens, stage by stage, from first conversation to handing over the keys.

Stage 1: Brief & Design (Weeks 1-4)

Everything starts with the brief — your wish list, your budget, and your non-negotiables. A good builder or designer will spend proper time at this stage understanding how you live, what you need the house to do, and what's realistically achievable within your budget.

This is where you make decisions about:

• Layout changes — are you knocking through walls, extending, or working within the existing footprint?

• Which rooms are being renovated and to what level (cosmetic refresh vs full strip-out)

• Kitchen and bathroom specifications

• Heating system — keeping the existing boiler or upgrading to a heat pump?

• Electrical requirements — how many sockets, lighting design, smart home features

• Flooring, joinery, and finish levels

The design phase typically produces floor plans, elevations, and a specification document that becomes the basis for pricing. If you're using a design and build service, this is all handled under one roof. If you're working with a separate architect, they'll produce drawings that you then take to builders for pricing.

Stage 2: Planning Permission & Building Regulations (Weeks 4-16)

Not every renovation needs planning permission, but many do — particularly if you're changing the external appearance, extending, or converting a loft. Even if you don't need planning, most renovation work requires building regulations approval.

Planning permission:Typically 8-12 weeks for a decision from BCP Council (which covers Christchurch). Your architect or designer handles the application.

Building regulations:You can apply for full plans approval (4-6 weeks for a decision) or use a building notice (you notify the council and they inspect as you go). Full plans is better because it confirms compliance before you start building.

Party wall notices:If your renovation involves work near shared walls or boundaries, you'll need to serve party wall notices. Allow two months for this.

The smart move is to run these processes in parallel. Submit the planning application, serve party wall notices, and apply for building regulations all at roughly the same time. That way you're not waiting for one to finish before starting the next.

Stage 3: Contractor Selection & Pre-Start (Weeks 12-16)

While the paperwork is being processed, you should be getting quotes and selecting your contractor. Get at least three detailed, itemised quotes based on the same drawings and specification so you're comparing like with like.

Once you've selected your builder, you'll agree:

• A contract (JCT Homeowner or equivalent)

• A payment schedule tied to completed stages

• A realistic programme of works with start and completion dates

• Access arrangements (will you live in the property during works?)

• Material selections and lead times for kitchens, bathrooms, tiles, etc.

This pre-start phase is crucial. The more decisions you make now, the fewer delays and cost increases you'll face once work begins. Visit showrooms, choose your tiles and sanitaryware, confirm your kitchen design, and order anything with a long lead time.

Stage 4: Demolition & Strip-Out (Week 1-2 on site)

This is where it gets real. The old kitchen comes out, bathroom suites get ripped out, dated plasterboard comes off, and you see the bones of the building for the first time. It's messy, noisy, and often a bit alarming — especially when your lovely home suddenly looks like a building site.

Strip-out is also where surprises emerge. Hidden asbestos, rotten timbers, bodged electrics from the 1970s, inadequate drainage — all things we regularly find in older Christchurch properties. This is why contingency budget matters.

A good builder will deal with each discovery methodically: assess the issue, explain the options, provide a cost for the additional work, and get your approval before proceeding. No reputable builder starts extra work without discussing it with you first.

Expect multiple skips at this stage. A full house strip-out on a 3-bed semi typically generates 4-6 skips of waste.

Stage 5: Structural Work (Weeks 2-4)

If your renovation involves removing load-bearing walls, installing steel beams, underpinning foundations, or building an extension, the structural work happens next. This is the heavy stuff — the work that makes everything else possible.

Common structural work in renovations includes:

• Removing internal walls and installing RSJs (steel beams) to create open-plan spaces

• New foundations for extensions

• Raising or altering roof structures for loft conversions

• Floor joist repairs or replacement

• New window and door openings (lintels, padstones)

Building control will inspect the structural work at key stages — typically foundations before concrete is poured, and steel beams before they're covered up. Your builder should schedule these inspections and not proceed until sign-off is given.

Stage 6: First Fix — Plumbing, Electrics & Carpentry (Weeks 4-7)

First fix is everything that goes behind the walls and under the floors before plastering. This is the nervous system of your house, and getting it right is critical.

Plumbing first fix:Hot and cold water pipes run to every bathroom, kitchen, and utility point. Waste pipes routed to the drainage. Heating pipework to all radiator positions. If you're having underfloor heating, the loops get laid now.

Electrical first fix:All the cables are run for sockets, switches, lighting, cooker, shower, smoke alarms, doorbell, TV points, network cables, and anything else that needs power or data. This is the stage where having a thorough lighting and electrical plan pays off. Adding sockets after plastering is possible but expensive and messy.

Carpentry first fix:Stud walls built, door linings fitted, any boxing-in done, window boards installed, and floor preparation completed.

First fix is inspected by building control (particularly the electrics) and must be signed off before plastering begins.

Stage 7: Plastering (Weeks 7-8)

Once first fix is complete and inspected, the plasterers move in. Every wall gets a fresh skim coat, ceilings are boarded and skimmed, and the house starts to look like a house again rather than a building site.

Plastering is a bottleneck stage. It needs to be done in one continuous flow by a dedicated team, and it needs time to dry before second fix begins. In a 3-bed whole-house renovation, plastering typically takes 5-7 days, with another 1-2 weeks of drying time depending on ventilation and season.

Don't rush the drying. Painting onto damp plaster leads to peeling and mould. Fitting kitchens against wet walls causes the units to warp. A week or two of patience here saves problems later.

Stage 8: Second Fix (Weeks 9-12)

Second fix is where the house comes together. All the visible elements get installed:

• Electrics: Sockets, switches, light fittings, consumer unit, smoke alarms connected and tested

• Plumbing: Bathroom suites fitted, kitchen sink and appliances plumbed, radiators or towel rails hung, boiler or heat pump commissioned

• Carpentry: Doors hung, skirting boards and architraves fitted, built-in storage assembled, staircases finished

• Kitchen: Units, worktops, splashbacks, and appliances installed

• Tiling: Bathroom walls and floors, kitchen splashbacks, any feature tiling

• Flooring: Engineered wood, LVT, carpet gripper, tiles — whatever you've chosen

Second fix is the longest stage and involves the most trades working in sequence. Coordination is everything. A good builder schedules this carefully so trades aren't tripping over each other and each element is completed before the next trade needs access.

Stage 9: Decoration (Weeks 12-14)

Painting and decorating is typically the second-to-last stage. Walls get mist-coated (a thinned first coat that seals the new plaster), then two coats of emulsion. Woodwork gets primed and painted. Any wallpapering happens now.

Allow 5-7 days for painting a typical 3-bed house. More if you've got intricate woodwork, feature walls, or multiple colours. Good decorators are in high demand in Dorset, so book them early.

A tip: choose your paint colours before the decorators start, not when they arrive. I've seen projects delayed by homeowners who can't decide between fifty shades of grey on the day the decorators show up with empty rollers.

Stage 10: Snagging & Sign-Off (Weeks 14-16)

Snagging is the final quality check. You walk through the property with your builder and note every minor defect: paint touch-ups needed, a door that sticks, a socket plate that's not quite level, a scratch on the kitchen worktop, silicone that needs tidying up.

A good builder expects a snagging list and addresses it promptly. On a full renovation, a list of 20-40 minor items is completely normal — it doesn't mean the work is poor. It means you're being thorough, which is exactly what this stage is for.

Building control will also do a final inspection at this stage and issue a completion certificate. Make sure you get this — you'll need it when you sell the property. Your electrician should also provide an electrical installation certificate, and your plumber should provide gas safety and/or unvented cylinder certificates as applicable.

Realistic Timeline for a Full House Renovation

For a typical 3-bedroom semi-detached house having a full renovation (new kitchen, new bathroom, rewire, re-plumb, replaster, new heating, decoration throughout), expect:

• Design and planning: 2-4 months

• On-site works: 3-5 months

• Total from first meeting to moving in: 5-9 months

Larger properties, extensions, loft conversions, or structural work will push this longer. A full renovation including a rear extension on a 4-bed detached property could take 6-9 months on site.

The biggest causes of delay are: late material selections (especially kitchens and bathrooms), unexpected structural issues, building control delays, and changes to the scope mid-project. Plan well, make decisions early, and keep your contingency intact, and you'll give yourself the best chance of staying on programme.

Should You Live In During a Full Renovation?

It depends on the scope. If the renovation is room-by-room and you always have a functioning kitchen and bathroom, living in is feasible if uncomfortable. If it's a full strip-out with no working kitchen or bathroom, you'll need to move out — or at least set up a temporary kitchen in a room that's not being worked on early in the programme.

Living in during renovation adds stress but saves money on temporary accommodation. Moving out adds cost (£800-£2,000 per month depending on where you stay in Dorset) but makes the project easier for everyone, often speeding up the work by 10-15% because the builder has unrestricted access.

Whatever you decide, discuss it with your builder before work starts. They can plan the programme to keep disruption manageable if you're staying, or move faster if the house is empty.

Getting Started

If you're considering a full renovation in Christchurch or the surrounding Dorset area, the first step is a conversation. We'll visit the property, listen to what you want to achieve, and give you an honest assessment of what's involved — scope, budget range, and timeline. No hard sell, just a clear picture of what your project looks like from someone who's done this dozens of times before.

Give us a call or fill in the contact form, and let's talk about what your home could become.