01Guides
What it costs, and what you get
Plain answers on fees, council charges and timescales for London period houses, each with the figures and the sources behind them.
- MCIAT chartered architectural technologists
- £2m professional indemnity insurance
- LABC Partnered
- ICO registered
02Guides
Every guide, by service
Extensions and lofts
How much do loft conversion drawings cost in London?Drawings for a Velux or dormer loft start at £845 inc survey. What decides whether you need planning permission, and what building control asks of the new room.
How much do rear extension drawings cost in London?Drawings for a rear extension to a London house start at £845 inc survey. How far you can build without applying, and when the council's £548 fee comes into it.
How much do side return extension drawings cost in London?Drawings for a side return infill start at £905 inc survey. We also say in writing whether it is permitted development, and draft the party wall notices for the shared boundary.
How much does a mansard roof extension cost to design in London?Mansard drawings for a London terrace start at £1,035 inc survey. Here is what the fee covers, what the council and your neighbours add, and why a mansard rarely counts as permitted development.
Building regulations
How much do building regulations drawings cost in London?Technical drawings for building control start at £905 inc survey. What they contain, what the council or a private inspector charges, and the notices you must give.
How much do fire strategy plans cost in London?Fire strategy plans for a house or loft start at £485. They show the escape route, the alarms and the fire-resisting doors that building control looks for.
How much do regularisation drawings cost in London?Survey and drawings of work already built, to ask the council for a regularisation certificate, start at £1,035 inc survey. The council's own regularisation charge is separate.
How much do SAP calculations cost in London?SAP calculations for a London home start at £245. The run uses your drawings and specification, and if it fails you get a list of changes starting with the least costly.
How much do structural calculations cost in London?Structural calculations for a London house start at £435. Each beam, lintel and foundation your scheme changes is calculated, sized and marked on the drawings for building control.
How much does a tender package cost in London?A tender package costs £1,095. It gives every builder the same drawings and specification to price, so the quotes you receive can be compared line by line.
Planning
How much do CIL forms cost in London?CIL forms cost £49 on their own and nothing inside a planning package. The levy itself often falls away for a home extension, if the exemption is claimed in time.
How much does a design and access statement cost in London?A design and access statement costs £265 with us. Whether your application needs one depends on its size and where the site is, and many householder schemes do not.
How much does a Lawful Development Certificate cost in London?Drawings for a certificate start at £775 inc survey, and the council charges half its normal fee, £274 for a householder scheme. What it proves and when it is worth having.
How much does a planning amendment cost in London?Revising drawings we prepared, with the covering statement, costs £325. The council charges £46 for a non-material change on a householder permission, and £89 for a section 73.
How much does a planning appeal cost in London?Our householder appeal service is a fixed £495. The deadline is short, 12 weeks from the refusal, so here is what the fee covers and what to do first.
How much does discharging planning conditions cost in London?Our fee is £375 for a pack of up to three conditions. The council charges its own fee, £89 on a householder permission, and has eight weeks to decide.
How much does listed building consent cost in London?The council charges nothing for the consent itself. Our drawings start at £2,405 inc survey, and the grade of your house and the reach of your scheme set where the fee lands.
How much does planning permission cost in London?Two bills make up the cost: the council's application fee, and the drawings. Ours start at £905 inc survey, and the council's householder fee is £548.
How much does prior approval for a larger extension cost in London?A larger-home extension notification costs the council £249, and our drawings start at £715 inc survey. It allows a single-storey rear extension of 6 or 8 metres without full planning permission.
How much does retrospective planning cost in London?Drawings for work already built start at £845 inc survey, and a householder application costs the council's £548. What the law allows, and how long the council has to act.
How much does a heritage statement cost in London?From £655 for a house, fixed before work starts. The grade of the building and how much your scheme touches move the price; the council charges nothing for listed building consent.
Specialist reports
How much does a bat survey cost in London?A bat survey for a London house starts at £545: a desk study of local records, an inspection of the roof and loft, and a written finding. Further surveys are quoted if the finding needs them.
How much does a daylight and sunlight report cost in London?A daylight and sunlight report for a London scheme starts at £985. Whether you need one depends on your council's local list and on how close your neighbours' windows are.
How much does a flood risk assessment cost in London?A site-specific flood risk assessment starts at £435. It is short for a householder extension and fuller for a basement, and written so the officer can tick off each test.
How much does a tree survey cost in London?A tree survey for a London extension starts at £485. We record each tree, draw its root protection area and show how the design avoids harm.
Advice before you buy or design
How much does a feasibility study cost in London?A feasibility and options study is £545. It shows what your house can take, what needs an application and what each option is likely to involve, before full drawings begin.
How much does a planning constraints report cost in London?A written constraints report is £19, credited against your drawings if you go ahead. It sets out what the listing, the conservation area and Article 4 do to your plans.
How much is a pre-purchase planning report in London?A pre-purchase planning report is £215, credited against drawings if you go ahead. It tells you what you can build, and what past work might cause trouble, before you exchange.
Surveys and design
How much does CAD conversion cost in London?Redrawing old plans in CAD costs £215 for up to four sheets. You get a DWG and a PDF at an identified scale, ready for your engineer, builder or planning application.
How much does interior layout design cost in London?Interior layout design for a London home starts at £515 inc survey. Two layouts are drawn with furniture at scale, stairs and storage checked, and load-bearing walls noted.
Send us the address of your house.
We look up the conservation area, listing and Article 4 position, then reply with a fixed fee. A message before 3pm is answered the same working day.