Home Renovation Harrow
Whole-home renovations in Harrow, layout, structure, kitchen and bathroom planned as one job, structure first, then services, then finishes.
- Rated 4.9 from 31 reviews on MyBuilder
- London guide: £40,000 to £150,000+
- Free site survey, itemised quote
GS Renovation refurbishes whole houses across Harrow, from tired 1930s semis in Pinner to substantial detached homes near Stanmore Common. We manage rewiring, replumbing, replastering and structural changes as one sequenced project, run by a single accountable team.
In Harrow, a full house refurbishment typically costs £40,000 to £150,000 or more (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Harrow: we carry the structure, services and finishes as one contract.
The two rooms that cost the most have their own pages, with prices: kitchen renovation in Harrow and bathroom renovation in Harrow. In the 62% of homes here that are houses, moving the kitchen usually means opening up the back of the ground floor, which is structural work.
Price guide
| Work | Indicative London range |
|---|---|
| Full house refurbishment | £40,000 to £150,000+ |
| Kitchen renovation | £18,000 to £60,000+ |
| Bathroom renovation | £6,000 to £20,000+ |
Indicative London ranges (MyBuilder and Checkatrade, 2026), not a quotation. Prices checked September 2026. Full breakdown: Full House Renovation Cost.
Quick estimate for Harrow
Harrow range: choose above
Whole-house refurbishment across Harrow
Many of Harrow's interwar houses have never had a full refurbishment, and homeowners in HA5 and HA7 come to us with dated wiring, old plumbing and cracked lath plaster that all need addressing together. We strip back where needed, rewire to current standards, replace worn pipework, and replaster throughout, so the fabric of the house is brought up to date rather than patched around cosmetically.
Running everything under one team means the trades follow in the right order, first fix before plaster, plaster before second fix, and decoration last. That sequencing matters most in an occupied family home, where we keep dust down and rooms usable as far as possible. The result across a Harrow semi is a house that feels new inside while keeping the solid interwar shell that made it worth buying.
Housing in Harrow
Roughly 96,870 dwellings sit on the valuation list for Harrow. 62% are houses and 38% flats, and by age 10% predate 1919, 52% are interwar and 38% post-war. A semi in Harrow usually has side access, and 31% of homes here are semi-detached.
Windows, front gardens and walls in Harrow conservation areas
A whole-house renovation in Harrow can reach well beyond the inside: new windows throughout, a paved front garden for the skip and later the car, a rebuilt front wall. Harrow Council's conservation page states that Harrow has 30 Conservation Areas. Harrow's Conservation Areas Residential Planning Guidelines say Article 4 Directions can mean planning permission is needed to replace doors and windows, for any hardsurfacing, and for boundary walls and fences. Each of those is a common line on a renovation schedule, and each can need an application first.
On a mock-Tudor house, the leaded casements are the item to settle first. Replacing them with double glazing is the obvious upgrade, and where a direction covers windows it can need permission, with the leading pattern and frame section looked at closely. Before the renovation budget is split, ask Harrow's planners whether your street is covered, then book the window survey and the front garden design once that answer is in writing. A skip can stand on the road under a licence while the question is settled, rather than on newly paved ground.
Reconfiguring dated Harrow interiors
The compartmented layouts of 1930s Harrow houses rarely suit modern life, so a full renovation is the natural moment to reconfigure. We open up reception rooms with engineer-designed steel, relocate a downstairs cloakroom, rework the kitchen into the garden, and rethink how the first floor bedrooms and bathroom are arranged, all signed off by building control where the structure changes.
Where a Harrow home retains period detail, such as original cornicing, picture rails or stained glass around Harrow on the Hill, we restore and protect it rather than strip it out. Elsewhere we bring in clean contemporary finishes. Because kitchens, bathrooms, structural work and decoration are handled by the same team, the whole project stays coordinated on one programme and one point of contact.
- Plastering, flooring, painting and decorating
- Loft, floor and wall insulation upgrades
- Staircase repair, replacement and balustrade work
VOA Council Tax stock of properties, March 2025, for all 30 statistical areas in Harrow. Counts rounded by the VOA.
Why Choose GS Renovation in Harrow
Harrow homeowners choose GS Renovation because a full refurbishment involves many trades, and we run them all under one roof. Rewiring, plumbing, plastering, structural steel and finishes are sequenced by a single team, with clear pricing and tidy working in your interwar home. Our founder's 30+ years on the tools keeps the whole project accountable from strip-out to snagging.
- Wiring, pipework and boiler condition surveyed before we price
- Building control applications and inspections coordinated for you
- Original features protected, repaired or reinstated as you want
Saiid did a complete refurbishment of our small bathroom. This involved ripping out the existing bath/shower, basin, toilet, pipework, and tiles and…
The kitchen has been fitted to the high standard. Saaid was polite, professional, tidy, he pays attention to a little details that make huge…
It's the second time I have hired George and he has been absolutely professional and the work he did resembles perfectly what I had in mind. Being an…
FAQ
Frequently Asked Questions about Home Renovation Harrow
Is the price of home renovation higher in Harrow than elsewhere in North West London?
The price of home renovation in Harrow is set by the housing rather than the postcode, within £40,000 to £150,000 or more (indicative). Older construction takes more making good than recent work, and access at HA1 affects the labour line. GS Renovation prices the property in front of it, because how much of the Harrow property is stripped at once decides how the trades are phased, rather than applying a Harrow multiplier.
Can you renovate my whole Harrow house while keeping the original features?
Yes. Many Harrow interwar homes have cornicing, picture rails or coloured glass worth keeping, and we protect and restore these while rewiring, replumbing and replastering behind them. Internal renovation needs building regulations for the electrics and any structural change, not planning permission, unless the house is listed, when listed building consent covers internal work too. We sequence structural work, kitchen, bathrooms and decoration together so the house is modernised without losing its character.
Will a whole-house renovation of my 1930s Harrow semi need an asbestos survey?
Yes, before strip-out begins. Buildings from before 2000 can contain asbestos, and interwar houses altered in later decades may have it in textured ceilings, old floor tiles, soffits or boiler flues. The survey identifies what is there, and anything found is removed or managed first, since breaking it releases fibres. Only then does the demolition programme start.
When should we choose the new heating system in a Harrow renovation?
Before first fix, because it dictates pipe sizes and routes. A new boiler, a cylinder, or a heat pump with bigger radiators each need different pipework and space, and all of that is run while floors are up and walls unplastered. Deciding late means lifting finished floors. Any gas appliance moved or fitted is handled by a Gas Safe registered engineer.
What does building control need to hear about in a Harrow house renovation?
Anything structural, new circuits and wiring in kitchens and bathrooms, and new extraction. Structural work goes to Harrow Council or a registered building control approver with calculations; the electrical work is certified under Part P by a registered electrician; extraction in kitchens and bathrooms is a Part F requirement. Cosmetic work needs nothing, so the notification list is drawn up room by room.
Should we move out during a Harrow whole-house renovation?
It depends on whether a rewire and heating change are included. Those need every floor open at once, so living in means dust, no heating for spells and power off at times. A cosmetic renovation done floor by floor is easier to live through. In a Harrow semi, a workable middle route is staying in for phased decorating and moving out only while first fix runs through every room.
Does planning advice given before March 2026 still hold for a Harrow renovation?
Check it again. Harrow Council adopted the Harrow Local Plan 2021-2041 on 24 March 2026, so planning advice, an earlier refusal or a neighbour's approval from before that date was judged against the previous policies. A renovation that adds a rear extension or changes the front of the house is now weighed against the new plan. Ask Harrow's planners, or your designer, which of the new policies apply to your house before relying on an older letter or a precedent next door.
Are the Stanmore houses named in Harrow's Article 4 directions treated differently?
Yes, the named properties are. An Article 4 direction in Stanmore Hill Conservation Area, Stanmore, came into force on 20th June 2023 for Applegarth, The Glade and the Orchard in Green Lane. In Kerry Avenue Conservation Area an Article 4(2) Direction has been in force since 1st February 1999 on named buildings, and the Little Common Conservation Area has one confirmed by Cabinet on 14th January 2003. If your house is named, external renovation work that would otherwise be permitted can need an application.
What finishes suit a Harrow house built before 1919?
Ones that let the walls breathe. 10% of homes in Harrow were built before 1919, and a house of that age is likely to have solid walls, lime mortar and lime plaster that manage moisture by letting it pass through. Gypsum skim on damp-prone walls, cement render outside or plastic paints can trap that moisture and push the damp somewhere else. On a renovation, test the plaster before stripping it, and specify lime-compatible repairs wherever the original survives.
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