Riverside and lower-lying streets may need drainage and waterproofing notes beyond a standard terrace pack.
Semi-detached steel design must respect shared party structures surveyed on site.
Thermal upgrades to solid and cavity hybrid walls are detailed for the actual host construction.
Garden room and rear extension junctions need weatherproofing details that match the approved planning form.
We sequence Wandsworth planning clarity before building-regulations steel design on Putney extensions.
Putney hill streets and riverside streets are not one technical template: drainage falls and waterproofing notes follow the actual pin level, not a SW15 average.
Mature garden trees common on larger Putney plots can force foundation redesign after planning; technical sections flag root-protection conflicts before tender.
Compared with denser Fulham terraces, Putney technical packs more often include longer garden drainage runs and freestanding garden-room junctions that must still match the approved planning form.
Putney building-regulations drawings more often open with tree root and garden-room junctions; Fulham packs more often open with side-passage build-over — different first technical sheets for the same west-London “extension” brief.
Technical drawings for Putney start only after the planning envelope or confirmed PD route is frozen — moving the SW15 rear wall after steel is designed wastes fees.
Openings, levels and party walls on streets shaped by Victorian and Edwardian houses, riverside streets and conservation pockets need engineer coordination so beams and padstones match the drawn Putney host.
Multi-storey Putney houses with open-plan ground floors get protected escape routes drawn into the technical set, not discovered at inspection.
Insulation and moisture details for SW15 fabric follow solid walls, cut roofs and lower-ground interfaces — not a new-build detail book.
Drainage under tight Putney gardens and closet wings is drawn with falls; build-over risks are flagged in the notes.
Compared with Barnes, Putney technical packs more often turn on Victorian and Edwardian houses, riverside streets and conservation pockets; we do not import Fulham detail sheets wholesale.
Putney sequence after planning clarity: survey updates, structure, technical plans/sections, building-control notes, tender issue.
Freeholder conditions on Putney construction method are written into the same notes building control will read.
We refuse technical production while Putney rear walls, openings or roof form are still moving.
Fixed-fee Putney technical packages are confirmed once envelope and structural brief are clear; Wandsworth charges and engineer fees sit outside unless agreed in writing.
The first technical deliverable for Putney is a frozen design model of the SW15 host — not a planning elevation re-labelled as construction information.
Where neighbours in Barnes, Fulham, Wandsworth already built, we still detail the Putney fabric and drains on this plot rather than copying their construction notes.
Building control assessment for Putney works is separate from planning’s eight-week target; the technical package must stand alone as construction information.
Contractors pricing Putney extensions need consistent steel, insulation, fire and drainage notes — missing interfaces are how tender exclusions appear.
On Putney projects shaped by Victorian and Edwardian houses, riverside streets and conservation pockets, we keep technical external details aligned with any planning conditions on materials, flues and rooflights so character and buildability do not fight each other on site.
