Cost to Convert a Loft (Updated Monthly)
👉 live data feed showing average loft conversion cost in UK based on real projects.
Velux Loft Conversion (UK)
Average price
£27,500
Typical range
£20,000 – £35,000
Our price starts from
£24,750
👉 Prices are guide-only and may vary by site conditions.
Loft Conversion Services in London
Looking for more living space without moving house?
Our loft conversion services in London turn unused attic space into stylish, practical rooms — ideal for bedrooms, home offices, en-suites, or even creative studios.
Whether you own a terraced, semi-detached, or detached home, we’ll design and deliver a tailored solution that adds space, comfort, and long-term value.
Our Loft Conversion Services
We offer a complete solution for a loft conversion including:
Why Convert Your Loft?
In London, space is limited and moving can be expensive. Therefore, converting your loft is one of the smartest upgrades you can make.
Key benefits:
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Adds up to 20% to your home’s value
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Creates usable space without reducing garden area
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Avoids the stress and cost of relocating
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Can be completed in weeks
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Often doesn’t require full planning permission
In fact, many lofts qualify under permitted development rights — especially rear dormers and Velux conversions.
Types of Loft Conversions We Offer in London
We tailor every conversion to your property type, budget, and goals.
Dormer Loft Conversion
From £40,000+
Extends out from the rear roof slope, creating full-height usable space.
Ideal for bedrooms with en-suites.
Velux / Rooflight Conversion
From £25,000+
The most budget-friendly option. We install windows and reinforce the floor — perfect if you already have decent loft headroom.
Hip to Gable Loft Conversion in London
From £45,000+
Extends the sloped side of a hipped roof to form a vertical gable wall.
Common in semi-detached homes across London.
Mansard Loft Conversion
From £75,000+
Maximises space with a flat-roofed extension across the back of your house.
Requires planning permission but offers the most internal space.
What’s Included in Our Loft Conversion Packages
We manage the entire process from day one — so you don’t have to deal with multiple trades.
🧭 Survey, Design & Planning
We begin with a structural survey and layout drawings. In addition, we’ll guide you through any planning permission if it’s required.
🏗️ Construction & Structural Works
We install beams, convert the roof space, build dormers, and reinforce the structure.
🪟 Insulation, Windows & Roofing
All our builds are fully insulated and fitted with Velux, dormer, or Juliet balcony windows to maximise light and warmth.
🔌 Electrics, Plumbing & Heating
We install sockets, lighting, radiators, extractor fans, and plumbing for loft bathrooms or en-suites.
🎨 Final Finishes
For example, we complete your loft with plastering, flooring, skirting boards, and decoration — ready for you to move in.
Who Chooses Loft Conversions in London?
Our clients include:
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Families – needing extra bedrooms
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Homeowners – building offices or gyms
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Landlords – increasing rental yield
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Investors – improving resale value
Not ready for a full conversion? Explore our House Extension Services or Full Home Renovation options.
Where We Work in London
We carry out loft conversions across Greater London, including:
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North London: Barnet, Camden, Finchley
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East London: Hackney, Leytonstone, Stratford
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South London: Clapham, Dulwich, Tooting
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West London: Acton, Ealing, Hammersmith
Because we know London well, we understand borough-specific planning rules, party wall agreements, and typical roof types.
👉 Book a Consultation
or call 020-805-804-05
FAQs – Loft Conversion Services in London
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Do I need planning permission for a loft conversion?
Often not. Velux and rear dormer conversions fall under permitted development. We’ll confirm this during your consultation.
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How long does a loft conversion take?
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Can I include a bathroom in my loft?
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Will it add value to my home?
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Will it affect my roof warranty or insulation?
Book a Loft Conversion Consultation
Want to find out what’s possible in your home?
We offer free site surveys and fixed-price quotes — no guesswork, no pressure.