Rule-of-thumb, NZ-construction-accurate estimating tools — real materials lists and cutting plans, not just a square-metre guess.
Plan a full deck's board layout from your actual stock on hand — joist grid, staggered joins, a real cutting plan, and a shopping list, not just a square-metre estimate.
Open →A rule-of-thumb DIY materials and labour estimate for a timber post-and-board retaining wall — post sizing, embedment, per-post RL profiles, and an automatic engineer-required warning past 1.5m.
Open →Joist size and spacing off a rule-of-thumb NZS 3604-style span table, hangers or skew-nail fixings, blocking, and a flooring sheet count — all with a labour estimate and a to-scale plan.
Open →Planned, not built yet — listed here so you know what's next.
Pad and strip footing size and depth from bearing load and ground conditions, NZS 3604 style — plus a concrete volume and bag-count materials list.
Timber pile size and spacing under a floor, from bearer spans and pile height — with a full pile and bearer materials list.
Stud spacing and sizing, dwangs, and a prenail-ready materials list for a wall frame — plus a rough erection time estimate, same as the retaining wall labour estimate.
Header beam sizing over door and window openings from span and roof load, off the NZS 3604 lintel tables.
Rafter and ceiling joist spans and sizing off the NZS 3604 tables, with a full roof framing materials list.
Wall bracing demand vs. bracing-unit capacity, NZS 3604 style — check a floor plan actually stacks up before you frame it.
Rise/going/tread count for a code-compliant stringer between two levels, with a cut-list for the stringer itself.
Post, beam, and rafter spacing and sizing for a simple open-roof structure, spanned to your dimensions.
Post spacing, rail count, and paling coverage for a standard timber paling fence — built on the same post/rail/infill engine as the retaining wall calculator.
Sheet count, purlin spacing, and flashing lengths for a simple gable or skillion roof.
Gutter length and downpipe count and fall, sized off your roof area and catchment.