Property Services in Sydenham
Professional renovations and home improvements in Sydenham, South East London
About Sydenham
Sydenham is gaining popularity with families priced out of Dulwich and Forest Hill, and the Victorian villas and Edwardian terraces along Sydenham Road and Kirkdale offer excellent renovation potential. The hillside setting gives many properties good views and natural light, and the larger Victorian villas have generous footprints that lend themselves to ambitious extension projects.
Postcodes we cover: SE26
Popular Services in Sydenham
Kitchen extensions are the most popular project in Sydenham, particularly on the larger Victorian properties where rear extensions of 5-6 metres can create impressive open-plan spaces. Loft conversions are also in demand — the Victorian villas often have steep pitched roofs with excellent headroom for dormer conversions. Property renovation is a growing category as more buyers discover Sydenham and invest in full refurbishments of period properties.
Planning & Building Control in Sydenham
Sydenham falls under Lewisham Council. The Sydenham Hill and Jews Walk conservation areas have design requirements for visible alterations, but most of Sydenham is outside conservation zones and standard permitted development rights apply. Lewisham Council is generally supportive of rear extensions and loft conversions that meet the standard criteria. The council operates an online planning portal and pre-application advice service.
Sydenham Property Insights
The hillside topography in Sydenham creates interesting challenges for extensions — sloping gardens may require stepped foundations and retaining walls, which add to the build cost. However, the slope also means many properties have elevated rear aspects with good natural light, making kitchen extensions particularly rewarding. The mix of London Clay and sandy subsoil on the hillside means ground conditions vary from property to property — we always investigate before finalising foundation designs.
Common Projects in Sydenham
Rear kitchen extension on a Victorian villa
The signature Sydenham project. The larger Victorian villas along Sydenham Road, Westwood Hill, and Kirkdale have generous rear gardens and substantial rear walls that suit single-storey extensions of 5-6 metres. The hillside means the rear aspect is often elevated above the garden, which gives strong natural light into the new space. Cost is £55,000-£90,000 including structural steelwork, stepped foundations where needed, retaining walls if the garden slopes significantly, glazing, electrics, plumbing, and finishes. Build time 12-16 weeks. The longer rear extensions in SE26 typically need full planning rather than permitted development.
Dormer loft conversion on a Victorian terrace
Sydenham's Victorian terraces have steep pitched roofs with excellent standing height — typically 2.4 metres or more at the ridge. Dormer conversions create a full-size bedroom with en-suite without raising the existing roof, which simplifies planning and Building Control. Cost is £45,000-£70,000 including dormer construction, staircase, en-suite plumbing, electrics, plastering, and decoration. Build time 10-14 weeks. Properties within the Sydenham Hill conservation area face restrictions on front-facing dormers; rear dormers are usually approved without issue.
Full property renovation on a period property
Sydenham attracts buyers who couldn't afford Dulwich or Forest Hill but want similar period housing stock. Full renovations typically include rewiring, replumbing, knocking through the ground floor, new kitchen and bathrooms, plastering, and complete decoration. Cost is £80,000-£180,000 depending on size and specification. Build time 16-22 weeks with a single project manager. Sydenham villas often have original cornicing, ceiling roses, and tiled hallway floors that add £15,000-£25,000 to property value when restored — we protect these during structural work.
Hillside extension with stepped foundations
A Sydenham-specific project type. Properties on the steeper streets (particularly the upper slopes around Sydenham Hill and Wells Park Road) have rear gardens that drop noticeably from the house. Standard strip foundations don't work on slopes — we use stepped foundations or short retaining walls to create a level base for the extension. The structural engineer specifies the foundation depth based on a trial hole investigation. Adds £4,000-£8,000 to typical extension cost compared with a flat-site equivalent. The result is an extension that sits level with the original ground floor and accesses the garden via shallow steps or a deck.
Our Services in Sydenham
Kitchen Extensions
We design and build kitchen extensions that turn cramped, separate rooms into open-plan spaces you actually want to cook and eat in.
From £45,000 | 10–14 weeks
Bathroom Fitting
Full bathroom renovations, from stripping out tired suites to fitting walk-in showers, freestanding baths, and underfloor heating.
From £4,000 | 2–4 weeks
Side Return Extensions
That narrow alley down the side of your terrace? We turn it into usable kitchen space.
From £35,000 | 8–10 weeks
Loft Conversions
Add a bedroom, en-suite, or home office without moving house.
From £45,000 | 6–10 weeks
Painter & Decorator
Clean lines, sharp edges, and a finish that lasts.
From £400 | 1–3 weeks
Property Renovation
Whole-house renovations managed by one team — structural work, rewiring, replumbing, kitchens, bathrooms, and decoration.
From £30,000 | 8–20 weeks
Damp Proofing
Damp ruins walls, damages health, and knocks thousands off your property value.
From £1,500 | 1–2 weeks
Garage Conversions
Your garage is wasted space.
From £15,000 | 4–8 weeks
End of Tenancy Painting
Tenants out Friday, painters in Monday, keys back by Thursday.
From £800 | 0.5–1 weeks
Media Wall Installation
We design and build bespoke media walls — the framework, the joinery, the electrics, and the finish.
From £3,500 | 1–2 weeks
What Customers Say
“All Well managed our project from start to finish. Professional, tidy, and great communication throughout.”
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“Fixed-price contract, no surprises, and they handled all the Building Control paperwork.”
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Frequently Asked Questions
- How does the Sydenham hillside affect extension costs?
- It usually adds 10-20% to the build cost depending on the gradient. Sloping gardens often need stepped foundations or retaining walls (£4,000-£8,000 above flat-site costs), and scaffolding setup is more involved. The mix of London Clay and sandy subsoil on the hillside means foundation depths vary from property to property — a trial hole at the survey gives the structural engineer the data needed to specify the right foundation. We firm up the foundation cost before issuing the contract so there are no surprises mid-project.
- Are Sydenham properties in conservation areas?
- Some are. The Sydenham Hill conservation area covers the upper slopes and includes some of the largest Victorian villas. The smaller Jews Walk conservation area is centred south of Sydenham High Street. In both, exterior changes (window replacement, render colour, front door style, dormer position) need sympathetic design and Lewisham Council can refuse retrospective consent for inappropriate alterations. Most of Sydenham — including most streets in SE26 — sits outside conservation areas and has full permitted development rights. We check before quoting.
- Can I extend higher than the standard permitted development limits in Sydenham?
- Yes, with full planning permission. Sydenham villas often suit extensions larger than the 3-4 metre permitted development limit — 5-6 metres on the larger properties is common. A full planning application takes 8-12 weeks at Lewisham Council and costs £206. We handle the application, drawings, design and access statement, and the council's conservation officer involvement where needed. Lewisham's pre-application advice service is useful for confirming feasibility before committing to designs on more ambitious projects.
- What's a typical timeline for a Sydenham renovation project?
- Depends on scope. Full property renovations of a Victorian villa take 16-22 weeks with one team. Kitchen extensions of 5-6 metres take 12-16 weeks. Dormer loft conversions take 10-14 weeks. Bathroom renovations take 3-5 weeks. We give a detailed programme of works at the contract stage and photo updates throughout the build throughout. Hillside projects can have weather-dependent groundwork on the early phases — we recommend starting between March and October where possible to avoid winter delays on foundations and external structure.
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