Side Return Extension Specialists in Anerley (SE20)
Professional side return extension specialists in Anerley, South East London.
Why Choose All Well for Side Return Extensions in Anerley?
We've done more side return extensions in Anerley than anywhere else — it's our home patch, and these Victorian terraces are perfect for it. The side passages along Anerley Road, Croydon Road, and the surrounding streets are typically 1.0-1.3 metres wide and run most of the depth of the house. Infilling that dead space and opening up the internal wall creates a kitchen-diner that feels like a completely different house. Being local means we can start quickly, visit easily, and keep a close eye on progress.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Side Return Extensions for Anerley Properties
Anerley is known for its victorian terraces, edwardian semis, period conversions. Our side return extensions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: SE20
Side Return Extensions Tip for Anerley Homeowners
Anerley is under Bromley Council with no conservation restrictions, so side return extensions go through as permitted development. We apply for a Lawful Development Certificate as standard — it costs £103 and gives you written proof from the council that the work is permitted. Useful when you sell. The party wall between your passage and the neighbour's is usually 4.5-inch brick (a single skin), which needs careful handling during construction to avoid damaging their side. We shore it up before removing any material.
Three Anerley side return patterns
Three patterns cover most of what we build in SE20. Standard side return infill on a Victorian terrace is the most common. The side passage (typically 1.0-1.3 metres wide and 4-6 metres deep) is infilled with a steel-framed structure, glazed roof (typically a flat skylight or roof lantern), and Crittall-style or thermally broken aluminium glazing on the new external wall. Combined with knocking through the existing kitchen wall, the result is a wider open-plan kitchen-diner. Cost is £35,000-£55,000 including structural steelwork, foundations on the local mix of clay and gravel (typically 1.0-1.3 metres), glazing, electrics, plumbing, and finishes. Build time 8-12 weeks. Side return plus rear extension (wraparound) is the second pattern, common on the wider terraces along Anerley Road and the streets towards Beckenham with both a usable side return and deep rear gardens. Combined cost is £55,000-£90,000 depending on the rear extension depth. Build time 12-16 weeks. The wraparound creates a substantial open-plan kitchen-diner of 25-35 square metres. Hillside side return on a lower-slope property is the third pattern, common on the streets sloping down towards Penge. The side passage drops noticeably from front to back, and the foundations need to step down the slope rather than running level. Cost is £45,000-£65,000 including the additional groundwork. Build time 10-14 weeks. The structural engineer specifies stepped foundation depth based on a trial hole and the slope assessment.
Single-skin party walls, hillside groundwater, and Anerley specifics
Three Anerley factors affect side return extensions specifically. Single-skin party walls. The Victorian terraces along Anerley Road, Croydon Road, and Selby Road typically share a 4.5-inch single-skin brick wall with the neighbour's side return. This is thinner than a standard 9-inch party wall and needs careful handling during construction. We shore the wall up internally before removing any material on our side, and inspect both faces of the wall before signing off the structural connection. Damage to the neighbour's side from poor handling is one of the most common party wall disputes, and we avoid it by surveying carefully and bracing properly. Hillside groundwater on the lower slopes. The Crystal Palace ridge runs through Anerley from the high ground at Anerley Park down towards the lower streets near Penge. Properties on the lower slopes have higher persistent groundwater than properties higher up, which affects foundation design — wetter soil compresses differently and may need a wider foundation or short piles to bear the load. We always do a trial hole on lower-slope properties before finalising the foundation design. No conservation areas. Anerley falls under Bromley Council and has no conservation zones. Permitted development rights apply on virtually every property. The standard 3-metre rear projection limit covers most side returns without a full planning application, and we submit a Lawful Development Certificate (£103, 6-8 weeks) for written confirmation. This protects the property at sale time. Party Wall Act 1996 requirements apply on virtually every Anerley side return because the new structure shares a boundary wall with the neighbour. Notice must be served on the adjoining owner at least two months before work starts. The neighbour can consent (in writing) or dissent and appoint a surveyor. Surveyor fees are typically £750-£1,500 if the neighbour dissents. We serve party wall notices early in every project so the schedule isn't delayed.
Project management on an Anerley side return
An Anerley side return involves 10-13 trades over 8-14 weeks: demolition, foundations and groundwork, drainage, structural steel, brick and block, roofing, glazing, plastering, electrics (NICEIC to BS 7671), plumbing, kitchen fitting, tiling, and decoration. We assign one project manager from survey through handover with photo updates throughout the build. Bromley Council handles the Lawful Development Certificate (£103, 6-8 weeks) on every permitted development project. Larger projects of 4-6 metres on detached or semi-detached properties go through the Larger Home Extension prior approval process (8-week neighbour consultation). Full planning at £206 covers anything beyond. Fixed-price contracts cover labour, materials, structural engineer calculations (£700-£1,400 for the steel and foundation design pack), Building Control fees (£400-£600 at Bromley), FENSA glazing registration, party wall surveyor coordination, stepped foundation design where needed, and the LDC or planning fee. The price doesn't change unless the specification does. Building Control inspections happen at foundation, DPC, drainage, structural steel, insulation (Part L: U-value 0.18 W/m²K for new walls and roof), and completion. Glazing is FENSA-registered with thermal performance to U-value 1.2-1.4 W/m²K. Origin or Schüco bifolds, Crittall steel-framed glazing, or thermally broken aluminium are standard. Roof construction is warm-roof with 150mm PIR insulation. Underfloor heating across the new floor area is standard. Proximity matters more on a side return than on most projects. Daily site visits, same-day surveys, and snag fixes are practical when our office is five minutes from your front door. Decorators and builders travelling from across London charge for return visits or rush the schedule to avoid them. We don't.
Side Return Extensions in Anerley: What's Included
Side Return Extensions Pricing in Anerley
£35,000 – £55,000
8–10 weeks | Fixed-price contracts | No hidden costs
What Our Customers Say
“All Well managed our project from start to finish. The fixed-price contract meant no surprises, and the result is stunning.”
Verified Customer
Anerley
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Anerley
Frequently Asked Questions
- How much does an Anerley side return extension cost?
- Standard side return infill on a Victorian terrace runs £35,000-£55,000 including structural steelwork, foundations, glazing, electrics, plumbing, and finishes. Side return plus rear extension (wraparound) runs £55,000-£90,000. Hillside side returns with stepped foundations on lower-slope streets near Penge run £45,000-£65,000 including the additional groundwork. Properties needing piled or wider foundations on persistent-groundwater sites add £4,000-£8,000. Fixed-price contract before any work starts. The price doesn't change unless the specification does.
- Will my Anerley side return need planning permission?
- Usually no. Anerley falls under Bromley Council and has no conservation restrictions, so permitted development rights apply on virtually every property. The standard 3-metre rear projection limit covers most side returns, and most don't extend any further back than the existing rear wall. We submit a Lawful Development Certificate (£103, 6-8 weeks at Bromley) for written confirmation, which protects the property at sale time. Larger Home Extension prior approval covers 4-6 metre projections on semi-detached or detached properties. Front-facing changes need full planning regardless.
- How does the Party Wall Act apply to my Anerley side return?
- It applies to virtually every Anerley side return because the new structure shares a boundary wall with the neighbouring property. The Anerley Victorian terraces typically have a single-skin 4.5-inch party wall (thinner than the standard 9-inch), which needs particularly careful handling during construction to avoid damage to the neighbour's side. The structural steelwork connection to the party wall and the new wall foundations on the boundary line both fall under the Party Wall Act 1996. Notice must be served on the adjoining owner at least two months before work starts. Surveyor fees are typically £750-£1,500 if the neighbour dissents. We serve party wall notices early in every project.
- Why hire All Well for an Anerley side return?
- Three reasons. First, proximity: our office is on Limes Avenue, SE20, five minutes from any Anerley property. We've built more side returns here than anywhere else — typical foundation conditions on the lower slopes, single-skin party wall handling, hillside groundwater diagnosis. Second, full accreditation: NICEIC electrical (BS 7671), FENSA glazing, structural engineer calculations, and Bromley Building Control sign-off included on every project. Third, fixed-price contracts: the quote doesn't change unless the specification does, including stepped foundations, party wall surveyor fees, and any wider-foundation design on persistent-groundwater sites. 57 verified Google reviews averaging 4.5/5.
Side Return Extensions Near Anerley
Get a Free Quote for Your Anerley Side Return Extensions
Fixed-price quote, no obligation. Call us or fill out our form.