Skip to content
ProjectsCost GuidesGuidesAnswersInsightsAbout
Get a Quote

Projects

Recent London builds.

Real projects, real numbers. Every case study shows actual cost, programme and outcome — including snag count at handover and resale value uplift where measured.

L-shape loft + master suite
L-Shape Loft Conversion

L-shape loft + master suite

Wandsworth · Victorian terrace · 12-week build

Cost
£118,000
Programme
12 wks
Year
2025
Side return kitchen extension
Side Return Extension

Side return kitchen extension

Hackney · Edwardian terrace · 11-week build

Cost
£92,000
Programme
11 wks
Year
2025
Mansard above Georgian terrace
Mansard Loft Conversion

Mansard above Georgian terrace

Camden · Grade II adjacent · 15-week build

Cost
£148,000
Programme
15 wks
Year
2024
Hip-to-gable + double dormer
Hip-to-Gable Loft Conversion

Hip-to-gable + double dormer

Ealing · 1930s semi · 13-week build

Cost
£102,000
Programme
13 wks
Year
2025
Double-storey extension
Double-Storey Extension

Double-storey extension

Richmond · Detached family home · 19-week build

Cost
£178,000
Programme
19 wks
Year
2024
Mansard master suite
Mansard Loft Conversion

Mansard master suite

Islington · Conservation area · 14-week build

Cost
£136,000
Programme
14 wks
Year
2025
Garden-linked basement conversion
Basement Conversion

Garden-linked basement conversion

Kensington · Stucco-fronted terrace · 26-week build

Cost
£410,000
Programme
26 wks
Year
2025
Integrated garage to home office
Garage Conversion

Integrated garage to home office

Brent · 1950s semi · 7-week build

Cost
£32,000
Programme
7 wks
Year
2025
L-Shape Loft Conversion, Hackney Victorian Terrace
L-Shape Loft Conversion

L-Shape Loft Conversion, Hackney Victorian Terrace

Two bedrooms and family bathroom under a natural slate dormer, woven into a conservation-area roofscape.

Cost
£125,000
Programme
13 wks
Year
2025
Side-Return Extension, Wandsworth Edwardian Terrace
Side-Return Extension

Side-Return Extension, Wandsworth Edwardian Terrace

A dark galley kitchen opened into a 32 sqm kitchen-diner with a structural rooflight and full-width garden link.

Cost
£95,000
Programme
14 wks
Year
2025
Mansard Loft, Camden Grade-II Listed Terrace
Mansard Loft Conversion

Mansard Loft, Camden Grade-II Listed Terrace

A traditional Camden mansard delivering a master suite and study within Conservation Area constraints — full planning and Listed Building Consent secured first time.

Cost
£165,000
Programme
18 wks
Year
2026
Double-Storey Side Extension, Ealing Edwardian Semi
Double-Storey Side Extension

Double-Storey Side Extension, Ealing Edwardian Semi

A 44 sqm double-storey side extension delivering a family kitchen-diner downstairs and master suite upstairs on a 1908 Ealing semi.

Cost
£178,000
Programme
20 wks
Year
2026
Spitalfields warehouse flat — heritage-led full renovation
Apartment Renovation

Spitalfields warehouse flat — heritage-led full renovation

Tower Hamlets · E1 · Grade II conservation area · 14-week build

Cost
£142,000
Programme
14 wks
Year
2026
Side return + L-shape loft, Clapham Old Town
Side Return + Loft

Side return + L-shape loft, Clapham Old Town

Lambeth · SW4 · Clapham Old Town Conservation Area · 22-week build

Cost
£195,000
Programme
22 wks
Year
2026
Riverside Edwardian whole-house renovation
Whole-House Renovation

Riverside Edwardian whole-house renovation

Richmond · TW10 · Petersham Conservation Area buffer · 32-week build

Cost
£425,000
Programme
32 wks
Year
2026
Side return + double-storey extension
Side Return + Double Storey

Side return + double-storey extension

Greenwich · SE3 · Blackheath Conservation Area · 24-week build

Cost
£215,000
Programme
24 wks
Year
2026
Double-storey rear extension on Edwardian terrace
Double-Storey Rear Extension

Double-storey rear extension on Edwardian terrace

Hammersmith and Fulham · W6 · Brackenbury Village Conservation Area · 26-week build

Cost
£248,000
Programme
26 wks
Year
2026
Stucco facade restoration + interior LBC works
Heritage Renovation + Listed Building Consent

Stucco facade restoration + interior LBC works

Kensington and Chelsea · SW7 · Grade II listed · 38-week build

Cost
£685,000
Programme
38 wks
Year
2026
Shoreditch warehouse mezzanine + roof terrace
Warehouse Conversion

Shoreditch warehouse mezzanine + roof terrace

Tower Hamlets · Warehouse conversion · 22-week build

Cost
£290,000
Programme
22 wks
Year
2025
Clapham double-storey side return + L-shape loft
Double-Storey Side Return Extension

Clapham double-storey side return + L-shape loft

Lambeth · Victorian terrace · 28-week build

Cost
£315,000
Programme
28 wks
Year
2025
Peckham Rye mansard loft + whole-house renovation
Whole-House Renovation

Peckham Rye mansard loft + whole-house renovation

Southwark · Victorian terrace · 30-week build

Cost
£385,000
Programme
30 wks
Year
2025
Forest Hill side return kitchen-diner
Side Return Extension

Forest Hill side return kitchen-diner

Lewisham · Victorian terrace · 18-week build

Cost
£165,000
Programme
18 wks
Year
2025
Muswell Hill Edwardian Double-Storey Side Return
Extension

Muswell Hill Edwardian Double-Storey Side Return

Edwardian villa, side return + first-floor over, low-carbon retrofit

Cost
£245,000
Programme
26 wks
Year
2025
Queen's Park Victorian Side Return + Whole House
Renovation

Queen's Park Victorian Side Return + Whole House

Victorian terrace, side return kitchen, dormer loft, full M&E rewire

Cost
£295,000
Programme
28 wks
Year
2026
Purley 1930s Double-Storey Side + Rear Extension
Extension

Purley 1930s Double-Storey Side + Rear Extension

1930s semi, double-storey side, single-storey rear, open-plan reno

Cost
£185,000
Programme
22 wks
Year
2026
Hampstead Garden Suburb rear extension + heritage sash restoration
House Extension

Hampstead Garden Suburb rear extension + heritage sash restoration

Barnet · 1909 Lutyens-influenced semi · NW11 · CA + HGS Trust controls

Cost
£285,000
Programme
28 wks
Year
2026
Chislehurst 1930s detached double-storey rear + loft
House Extension

Chislehurst 1930s detached double-storey rear + loft

Bromley · 1934 detached · BR7 · large rear garden, no CA

Cost
£215,000
Programme
24 wks
Year
2026
Surbiton side return + sash restoration
Kitchen Extension

Surbiton side return + sash restoration

Kingston upon Thames · 1898 Victorian end-of-terrace · KT6 · Surbiton CA

Cost
£145,000
Programme
18 wks
Year
2026
Bedford Park wraparound + heritage restoration
Kitchen Extension

Bedford Park wraparound + heritage restoration

Hounslow · 1888 Norman Shaw garden suburb · W4 · Bedford Park CA Article 4

Cost
£265,000
Programme
26 wks
Year
2026
Full-insulated garden studio
Garden Office

Full-insulated garden studio

Wandsworth · Screw pile · 5-week build

Cost
£38,500
Programme
5 wks
Year
2025
Conservation area orangery dining room
Conservatory & Orangery

Conservation area orangery dining room

Camden · Victorian terrace · 10-week build

Cost
£78,000
Programme
10 wks
Year
2025
Double-storey rear + mansard loft, Clapton
Loft Conversion

Double-storey rear + mansard loft, Clapton

Hackney · 1895 Victorian terrace · E5 · 20-week build

Cost
£192,000
Programme
20 wks
Year
2026
Prior approval open-plan rear extension
House Extension

Prior approval open-plan rear extension

Enfield · 1930s semi-detached · N13 · 10-week build

Cost
£88,000
Programme
10 wks
Year
2025
Hip-to-gable loft + ASHP & solar, Wimbledon
Loft Conversion

Hip-to-gable loft + ASHP & solar, Wimbledon

Merton · 1935 semi-detached · SW19 · 14-week build

Cost
£117,000
Programme
14 wks
Year
2026
Walthamstow Village side return kitchen, heritage CA
Side Return Extension

Walthamstow Village side return kitchen, heritage CA

Waltham Forest · 1880s Victorian terrace · E17 · 12-week build

Cost
£86,000
Programme
12 wks
Year
2026
Grade II listed full renovation, Pimlico
House Renovation

Grade II listed full renovation, Pimlico

Westminster · 1840s Georgian terrace · SW1V · 22-week build

Cost
£285,000
Programme
22 wks
Year
2026
Double-storey side extension, Stratford
House Extension

Double-storey side extension, Stratford

Newham · 1952 post-war semi-detached · E15 · 16-week build

Cost
£128,000
Programme
16 wks
Year
2026
Hip-to-gable loft + rear dormer
Hip-to-Gable Loft Conversion

Hip-to-gable loft + rear dormer

Harrow · 1930s semi-detached · 10-week build

Cost
£72,000
Programme
10 wks
Year
2025
Rear extension + attic room
Rear Extension & Loft Room

Rear extension + attic room

Sutton · 1950s bungalow · 13-week build

Cost
£96,000
Programme
13 wks
Year
2025
Double-storey rear extension, Seven Kings
House Extension

Double-storey rear extension, Seven Kings

Redbridge · 1952 semi-detached · IG3 · 14-week build

Cost
£108,000
Programme
14 wks
Year
2026
Rear extension + full ground-floor renovation, Becontree
House Extension

Rear extension + full ground-floor renovation, Becontree

Barking and Dagenham · 1932 terrace · RM8 · 12-week build

Cost
£86,000
Programme
12 wks
Year
2026
Double-storey side extension, Sidcup
House Extension

Double-storey side extension, Sidcup

Bexley · 1933 semi-detached · DA15 · 18-week build

Cost
£145,000
Programme
18 wks
Year
2026
Rear extension + dormer loft conversion, Ruislip
Whole House

Rear extension + dormer loft conversion, Ruislip

Hillingdon · 1936 detached · HA4 · 22-week build

Cost
£215,000
Programme
22 wks
Year
2026
Grade II Georgian whole-house heritage restoration, Canonbury
Whole House

Grade II Georgian whole-house heritage restoration, Canonbury

Islington · 1825 Grade II Georgian terrace · N1 · 28-week build

Cost
£385,000
Programme
28 wks
Year
2026
Victorian terrace period-features restoration + side return extension, Tooting
Whole House

Victorian terrace period-features restoration + side return extension, Tooting

Wandsworth · 1888 Victorian terrace · SW17 · 24-week build

Cost
£245,000
Programme
24 wks
Year
2026
Broken-plan kitchen-diner-snug + rear extension, Crouch End
House Renovation

Broken-plan kitchen-diner-snug + rear extension, Crouch End

Haringey · 1908 Edwardian semi · N8 · 16-week build

Cost
£168,000
Programme
16 wks
Year
2026
Double-storey side extension + loft conversion, Winchmore Hill
House Extension

Double-storey side extension + loft conversion, Winchmore Hill

Enfield · 1934 semi-detached · N21 · 18-week build

Cost
£145,000
Programme
18 wks
Year
2026
Wraparound side-rear extension + dormer loft, Romford
House Extension

Wraparound side-rear extension + dormer loft, Romford

Havering · 1962 semi-detached · RM2 · 20-week build

Cost
£168,000
Programme
20 wks
Year
2026
Listed Barbican Estate flat renovation, EC2Y
Whole House

Listed Barbican Estate flat renovation, EC2Y

City of London · Grade II Barbican Estate flat · EC2Y · 16-week build

Cost
£295,000
Programme
16 wks
Year
2026
1970s detached deep retrofit — ASHP + MVHR + EPC F→A, KT2
Whole House

1970s detached deep retrofit — ASHP + MVHR + EPC F→A, KT2

Kingston upon Thames · 1972 detached · KT2 · 24-week build

Cost
£248,000
Programme
24 wks
Year
2026
Edwardian rear garden full landscape — Renson bioclimatic + porcelain terrace, N14
Whole House

Edwardian rear garden full landscape — Renson bioclimatic + porcelain terrace, N14

Enfield · Edwardian semi rear garden · N14 · 14-week landscape

Cost
£78,500
Programme
14 wks
Year
2026
1930s semi rear extension + loft + energy retrofit, W5
Whole House

1930s semi rear extension + loft + energy retrofit, W5

Ealing · 1934 mock-Tudor semi · W5 · 26-week build

Cost
£285,000
Programme
26 wks
Year
2026
Listed Georgian townhouse whole-house restoration, SE3
Whole House

Listed Georgian townhouse whole-house restoration, SE3

Lewisham · Grade II Georgian terrace · SE3 · 32-week build

Cost
£425,000
Programme
32 wks
Year
2026
Edwardian period restoration with ASHP + MVHR, BR2
Whole House

Edwardian period restoration with ASHP + MVHR, BR2

Bromley · 1906 Edwardian semi · BR2 Shortlands · 22-week build

Cost
£285,000
Programme
22 wks
Year
2026
1968 detached deep retrofit — EnerPHit, EPC G→A+, net energy positive
Whole House

1968 detached deep retrofit — EnerPHit, EPC G→A+, net energy positive

Harrow · 1968 detached · HA7 Stanmore · 28-week build

Cost
£348,000
Programme
28 wks
Year
2026
Victorian terrace converted to two self-contained flats, E16
Flat Conversion

Victorian terrace converted to two self-contained flats, E16

Newham · Victorian terrace · E16 Canning Town · 26-week build

Cost
£218,000
Programme
26 wks
Year
2026
Victorian side return + L-shape loft, South Norwood Conservation Area
Side Return Extension + Loft Conversion

Victorian side return + L-shape loft, South Norwood Conservation Area

Croydon · 1893 Victorian mid-terrace · SE25 · 20-week build

Cost
£195,000
Programme
20 wks
Year
2026
Carshalton Village Victorian terrace heritage restoration, SM5
Whole House

Carshalton Village Victorian terrace heritage restoration, SM5

Sutton · 1881 Victorian mid-terrace · SM5 Carshalton Village CA · 24-week build

Cost
£268,000
Programme
24 wks
Year
2026
1962 detached EnerPHit-grade deep retrofit, Coombe KT2
Whole House

1962 detached EnerPHit-grade deep retrofit, Coombe KT2

Kingston upon Thames · 1962 detached · KT2 Coombe · 30-week build

Cost
£385,000
Programme
30 wks
Year
2026
Highgate Edwardian circular-economy retrofit
Whole-House Renovation + Side Return

Highgate Edwardian circular-economy retrofit

Haringey · 1908 Edwardian terrace N6 · 22-week build · WLCA + reclaimed materials + low-carbon spec

Cost
£295,000
Programme
22 wks
Year
2026
Pimlico mansion-block flat fire-safety + heritage refurbishment
Flat Renovation

Pimlico mansion-block flat fire-safety + heritage refurbishment

Westminster · Grade II mansion block SW1V · 18-week build · BSA dutyholder regime + FD60S fire doors + heritage retention

Cost
£168,000
Programme
18 wks
Year
2026
Victorian terrace + KNX smart home + circadian lighting, Balham SW12
Whole House

Victorian terrace + KNX smart home + circadian lighting, Balham SW12

Wandsworth · 1898 Victorian terrace · SW12 Balham · 24-week build

Cost
£425,000
Programme
24 wks
Year
2026
Edwardian semi + rainwater harvesting + microcement kitchen, Wanstead E11
Whole House

Edwardian semi + rainwater harvesting + microcement kitchen, Wanstead E11

Redbridge · 1908 Edwardian semi-detached · E11 Wanstead · 22-week build

Cost
£295,000
Programme
22 wks
Year
2026
Enforcement appeal win — 1930s rear extension immunity confirmed
Enforcement Appeal + Rear Extension

Enforcement appeal win — 1930s rear extension immunity confirmed

Enfield · 1932 mid-terrace · enforcement notice quashed + CLEUD issued

Cost
£22,500
Programme
38 wks
Year
2026
Householder appeal win — refused mansard loft in CA approved on appeal
Householder Appeal + Mansard Loft Conversion

Householder appeal win — refused mansard loft in CA approved on appeal

Brent · 1885 Victorian terrace · Kilburn CA · HAS appeal allowed first-time

Cost
£142,000
Programme
56 wks
Year
2026
Ex-pub conversion — Brixton ACV-listed corner pub to 4 self-contained flats
Pub-to-Resi Conversion (Sui Generis → C3)

Ex-pub conversion — Brixton ACV-listed corner pub to 4 self-contained flats

Lambeth · 1894 corner public house · ACV + Sui Generis to C3 · 9 flats refused, 4 approved

Cost
£685,000
Programme
42 wks
Year
2026
Ex-chapel conversion — 1862 Bermondsey Wesleyan chapel to single family home
Chapel-to-Resi Single-Dwelling Conversion (Sui Generis → C3)

Ex-chapel conversion — 1862 Bermondsey Wesleyan chapel to single family home

Southwark · Grade II listed Wesleyan chapel · Sui Generis to C3 single dwelling · LBC + CA + Article 4

Cost
£925,000
Programme
56 wks
Year
2026
Ex-warehouse conversion — 1898 Dalston printworks to 4 residential flats
Warehouse-to-Resi 4-Flat Conversion (B8 → C3)

Ex-warehouse conversion — 1898 Dalston printworks to 4 residential flats

Hackney · 1898 Victorian printworks · B8 storage to C3 residential × 4 · CA + Article 4

Cost
£1,185,000
Programme
64 wks
Year
2026
C3 to 6-bed HMO sui generis — Walthamstow Victorian conversion + Article 4 planning win
Victorian Terrace C3 → Sui Generis HMO Conversion (6-bed)

C3 to 6-bed HMO sui generis — Walthamstow Victorian conversion + Article 4 planning win

Waltham Forest · Victorian terrace · C3 → sui generis HMO planning under Article 4 + mandatory HMO licence + design 12% above borough HMO standards

Cost
£158,000
Programme
22 wks
Year
2026
Class MA office → 12 flats — Brentford 1980s office conversion + Article 4 boundary win
Class MA Office-to-Residential Conversion (12 flats)

Class MA office → 12 flats — Brentford 1980s office conversion + Article 4 boundary win

Hounslow · 1,180m² Class E office → C3 prior approval + 12 NDSS-compliant flats + Class A.1 rear extension + light well excavation

Cost
£1,350,000
Programme
56 wks
Year
2026
Class G shop-with-flat → 2 flats — Bermondsey Victorian mixed-use conversion + maisonette extension
Class G Mixed-Use Conversion (1 new flat + 1 retained flat extension)

Class G shop-with-flat → 2 flats — Bermondsey Victorian mixed-use conversion + maisonette extension

Southwark · Victorian terraced High Street · Class G ground-floor Class E shop → C3 1-bed flat + retained upstairs C3 flat extended into rear addition

Cost
£220,000
Programme
18 wks
Year
2026
Edwardian broken-plan kitchen renovation — Plain English in-frame + Calacatta island
Kitchen Renovation (broken-plan + structural opening)

Edwardian broken-plan kitchen renovation — Plain English in-frame + Calacatta island

Richmond upon Thames · TW1 Twickenham · Edwardian villa · 11-week build

Cost
£142,000
Programme
11 wks
Year
2026
Victorian master ensuite + family bathroom retrofit — Drummonds + Lefroy Brooks
Bathroom Renovation (master ensuite + family bathroom)

Victorian master ensuite + family bathroom retrofit — Drummonds + Lefroy Brooks

Hammersmith and Fulham · SW6 Parsons Green · Victorian terrace · 7-week build

Cost
£68,500
Programme
7 wks
Year
2026
Grade II listed Hampstead master suite — Calacatta marble + LBC heritage retrofit
Bathroom Renovation (master suite — ensuite + dressing room + LBC)

Grade II listed Hampstead master suite — Calacatta marble + LBC heritage retrofit

Camden · NW3 Hampstead · Grade II Georgian townhouse · 14-week build

Cost
£165,000
Programme
14 wks
Year
2026
Highbury Victorian terrace — master ensuite carve-out + family bathroom paired retrofit
Bathroom Renovation (master ensuite carve-out + family bathroom)

Highbury Victorian terrace — master ensuite carve-out + family bathroom paired retrofit

Islington · N5 Highbury Fields · Victorian terrace · 8-week build

Cost
£82,500
Programme
8 wks
Year
2026
1934 mock-Tudor semi — integral garage → bedroom + ensuite + utility (PD route)
Garage Conversion (integral garage → bedroom + ensuite + utility)

1934 mock-Tudor semi — integral garage → bedroom + ensuite + utility (PD route)

Ealing · W5 Pitshanger · 1934 mock-Tudor semi · 7-week build

Cost
£48,500
Programme
7 wks
Year
2026
1928 detached garage → self-contained 1-bed annexe with kitchenette + shower room
Garage Conversion (detached garage → self-contained annexe with kitchenette + shower room)

1928 detached garage → self-contained 1-bed annexe with kitchenette + shower room

Richmond upon Thames · TW1 St Margarets · detached garage outbuilding · 11-week build

Cost
£92,500
Programme
11 wks
Year
2026
Georgian whole-house renovation — Maritime WHS buffer
Heritage Whole-House Renovation

Georgian whole-house renovation — Maritime WHS buffer

Greenwich · 1798 Grade II Georgian terrace · 32-week programme

Cost
£612,000
Programme
32 wks
Year
2026
Victorian whole-house renovation — Heaver CA broken-plan
Victorian Whole-House Renovation

Victorian whole-house renovation — Heaver CA broken-plan

Wandsworth · 1892 Heaver CA terrace · 28-week programme

Cost
£425,000
Programme
28 wks
Year
2026
Victorian side-return + rear kitchen extension — Parsons Green CA
Kitchen Extension

Victorian side-return + rear kitchen extension — Parsons Green CA

Hammersmith and Fulham · 1889 Parsons Green CA terrace · 14-week build

Cost
£148,500
Programme
14 wks
Year
2026
Victorian side-return + rear kitchen extension — Bow Article 4 CA
Kitchen Extension

Victorian side-return + rear kitchen extension — Bow Article 4 CA

Tower Hamlets · 1885 Bow CA terrace · 12-week build

Cost
£118,000
Programme
12 wks
Year
2026
Ground-floor structural opening + twin chimney-breast removal
Structural Alterations

Ground-floor structural opening + twin chimney-breast removal

Lambeth · 1891 Clapham Old Town terrace · 9-week build

Cost
£38,500
Programme
9 wks
Year
2026
Grade II Georgian structural alteration with LBC + heritage propping
Structural Alterations

Grade II Georgian structural alteration with LBC + heritage propping

Islington · 1832 Grade II Canonbury terrace · 16-week build

Cost
£96,500
Programme
16 wks
Year
2026
W11 stucco terrace full-house basement with lap pool, cinema and wine cellar
Basement Conversion

W11 stucco terrace full-house basement with lap pool, cinema and wine cellar

Kensington & Chelsea · 1854 stucco terrace · 38-week basement build

Cost
£1,450,000
Programme
38 wks
Year
2026
NW3 Belsize Park Victorian semi basement conversion with rear lightwell and bedroom suite
Basement Conversion

NW3 Belsize Park Victorian semi basement conversion with rear lightwell and bedroom suite

Camden · 1882 Belsize Park CA Victorian semi · 24-week basement build

Cost
£285,000
Programme
24 wks
Year
2026
W11 Notting Hill Grade II stucco terrace mansard with full LBC
Mansard Loft Conversion

W11 Notting Hill Grade II stucco terrace mansard with full LBC

Kensington and Chelsea · 1853 Grade II stucco terrace · 18-week mansard build

Cost
£195,000
Programme
18 wks
Year
2026
W1 Marylebone Edwardian mansion-block penthouse mansard with BSA HRB Gateway 2 + Licence to Alter
Mansard Loft Conversion

W1 Marylebone Edwardian mansion-block penthouse mansard with BSA HRB Gateway 2 + Licence to Alter

Westminster · 1906 mansion-block penthouse · 22-week mansard build + 18-month consent ladder

Cost
£425,000
Programme
22 wks
Year
2026