Guides and cost breakdowns
Real South London numbers, planning rules and build timelines — written by the team that does the work, not a content agency.
- Can Your Loft Be Converted? The Measurement, the Roof Type and the Staircase
How to check whether your South London loft can be converted: measuring head height properly, cut vs trussed roofs, the staircase rule that decides it, and what each property type allows.
- London Clay, Trees and Foundations: Why Two Identical Extensions Can Cost £15,000 Apart
Why South London foundations vary from 1m to 2.5m and beyond. London Clay vs Thames gravel, tree influence under NHBC 4.2, heave risk, and what each half metre adds to the price
- Party Wall Notices in South London: The Delay Nobody Puts in the Programme
When a South London extension or loft triggers the Party Wall Act, how long each notice takes, what a surveyor costs, who pays — and the six mistakes that push it onto the critical path
- Permitted Development in South London: The Streets and Estates Where You've Lost It
Which South London conservation areas and Article 4 directions remove permitted development rights. Wandsworth's eight estates, Lambeth's nine, Dulwich Estate rules — and how to check your address
- 16 Weeks of a Side Return Extension: What Happens, Week by Week
The full 16-week programme for a Victorian side return in South London — what happens each week, when Building Control visits, what neighbours notice, and how stage payments should be structured
- How much does a loft conversion cost in London? (2026 guide)
Loft conversion cost London 2026: real price ranges for Velux, dormer, hip-to-gable, mansard and L-shaped conversions, plus party wall and hidden costs.
- Rear extension vs side return vs wrap-around: which is right for your London terrace?
Which extension type is right for your London terrace? Honest 2026 comparison of rear, side return and wrap-around — costs, planning, and real-world tradeoffs.
- Side return extension cost in London: a 2026 breakdown for terrace owners
Side return extension cost London 2026: full breakdown for Victorian and Edwardian terraces, including party wall, structural and finish costs.
- How Much Do Architects Drawings for a Loft Conversion Cost in South London?
What drawings you actually need, what each stage costs in South London, and where people overspend. 2026 figures.
- 3 Reliable architectural services in Clapham
Design, drawings and planning for Clapham properties — handled by the same team that builds the project.
- Top 3 Architectural services Streatham
Local design and planning support for Streatham homes, from measured survey through to Building Control sign-off.
- How Much Does a Basic Loft Conversion Cost in South London?
What a simple rooflight conversion really costs in South London, what is included at that price and when it stops being enough.
- Bungalow Loft Conversion Cost in South London?
Converting a bungalow roof — structure, staircase position and planning. Real South London cost ranges.
- How Much Does a Dormer Loft Conversion Cost in South London?
The South London standard. Real cost ranges for a rear dormer, what drives the number and how long it takes on site.
- How Much Does a Hip-to-Gable Loft Conversion Cost in South London?
Costs for semi-detached and end-of-terrace hip-to-gable conversions, including the dormer, structure and finishes.
- How Much Does a Loft Conversion Cost for a Victorian Terrace in South London?
The most common South London job. Cost ranges for Victorian terraces, party wall implications and what the back addition changes.
- How Much Does a Loft Conversion Cost On a 2-bed Semi in South London?
Costs for a two-bed semi, including hip-to-gable options, and how the roof shape moves the final figure.
- How Much Does a Loft Conversion Cost on a 2-Bed Terrace in South London?
What a third bedroom and en-suite costs on a two-bed terrace, and what it adds to the value of the property.
- How Much Does a Mansard Loft Conversion Cost in South London?
A full roof rebuild for maximum headroom. What a mansard costs in South London, planning constraints and realistic timelines.
- How Much Does Planning Permission Cost for a Loft Conversion in South London?
Council fees, drawings and consultant costs — plus when permitted development means you need none of it.
- Questions to ask a builder when building a house extension
The questions that separate a proper contractor from a problem. What to ask about contracts, insurance, staging and guarantees.
- Trusted Roofers in Streatham
Roof repairs, re-covering and structural roof work on Streatham properties, with a guarantee on materials and workmanship.
- How Much Does Scaffolding Cost for Loft Conversion in South London?
Weekly hire rates, how long scaffolding stays up on a loft job, and what access restrictions add to the bill.
- How Much Does a Small Loft Conversion Cost in South London?
What you can build in a tight roof space, what it costs and where the fixed costs stop scaling down.
- How Much Does a Structural Engineer Cost for Loft Conversion in South London?
What the calculations cover, what engineers charge in South London and at what point in the project you need them.
- How Much Does a Velux Loft Conversion Cost in South London?
The cheapest route into a loft. Costs, headroom requirements and whether rooflight-only is right for your roof.
- Premier Loft Boarding in Streatham
Proper loft boarding that keeps the insulation working — raised joists, safe loading and a fixed price.