Project costing - free
Loft conversion (dormer or rooflight): cost a whole project, stage by stage
Structural floor, stairs, dormer, insulation, services, finishes. JobBosh lays the project out as 17 stages: 9 are calculated by their own recipes from your measurements; the rest - design, steel, windows, certificates - are priced from a quotation or a figure you already hold, and it says so until you have it.
The stages
| Stage | Work | How it is costed | Enquiries it may need | |
|---|---|---|---|---|
| Survey, design and engineering | Drawings and structural calculations | Design and engineering fees - by quotation | Architect / architectural technologist, Structural engineer | usual |
| Permissions and notices | Building control, party-wall notices, planning for a dormer where needed | Fees - by quotation | - | optional |
| Site set-up and protection | Scaffold, roof access, protection | by someone else's figure | Scaffolding | usual |
| Structural work | New structural floor (joists to the engineer's design) | calculated by its recipe | - | usual |
| Structural work | Steel beams / ridge beam | Steelwork - by quotation | Steel fabrication | usual |
| Roofing | Dormer flat roof | calculated by its recipe | - | usual |
| Walls and openings | Dormer cheeks and internal partitions | calculated by its recipe | - | usual |
| Windows and external doors | Rooflights / dormer windows | Windows supply and fit - by quotation | Windows and doors supply and fit | usual |
| First fix (carpentry, plumbing, electrics) | Electrics | calculated by its recipe | - | usual |
| First fix (carpentry, plumbing, electrics) | En-suite plumbing | calculated by its recipe | - | optional |
| Insulation | Rafter insulation to the regulations | Insulation boards - from the materials basket | - | usual |
| Plastering and finishing | Board and skim | calculated by its recipe | - | usual |
| Second fix | Doors | calculated by its recipe | - | usual |
| Second fix | Skirting and architrave | calculated by its recipe | - | usual |
| Decorating | Decorate | calculated by its recipe | - | usual |
| Commissioning and inspections | Building control completion, fire-door and escape checks | Certificates and inspection fees | - | usual |
| Snagging and handover | Snagging and handover | by someone else's figure | - | usual |
What you get
- Every stage's quantities and hours from its recipe, priced at your rates and prices; the specialist stages as named unknowns until a quotation or your figure resolves them - never a guess
- Supplier enquiries drafted from the job's facts for scaffold, skips, steel, windows, the professions - approved by you before anything is sent, replies compared like for like
- Travel, parking and road charges from the dated catalogue; the site questions (welfare, power, water, access, protection, waste) as lines, enquiries and sentences in the document
- A phased, branded quotation itemised by stage that reconciles to the penny, with provisional allowances shown apart, accepted on a secure link; variations recorded against it