How to Draw a Site Plan Online Without CAD Software

A site plan is a scaled, top-down drawing of a property showing the boundary, the structures on it, and the distances between them. Contractors need one whenever a job changes what sits on the land or where — a fence, a deck, an addition, a shed, a concrete pad, a pool. Before opening any tool, three things need to be in hand: the lot dimensions, the footprint sizes of the main structures, and the measurements that locate those structures relative to the property lines.

Lot dimensions typically come from a plot plan, a purchase document, or municipal parcel records — SiteBuildHub's Resources library covers field-measurement workflows if you're capturing dimensions on site rather than pulling them from records. Structure locations get tape-measured or laser-measured on site. Write every number down before opening a drawing tool. The actual drawing goes fast once the measurements are ready; almost all the time loss in site-plan drawing comes from stopping mid-drawing to go re-measure something.

This guide walks through the same process whether you're using SiteBuildHub's Site Plan Maker or any other scaled browser tool — the steps are about the drawing method, not one specific product.

The single thing that separates a site plan from a doodle is scale. Every shape you place needs to be proportional to every other shape, which means the sheet needs a defined scale before the first line goes down — not after. In a browser tool with a scaled grid, one square typically equals one foot, so anything drawn on the grid is automatically proportional without manual conversion.

If you're working from a residential site plan template, start there rather than a blank canvas — a template usually arrives with a property line, a house footprint, a driveway, and sample dimensions already placed, which gives you a working reference instead of an empty grid. If you're starting blank, draw the property boundary first as a rectangle at the lot's true dimensions. Everything else gets positioned inside that boundary, so getting it right first prevents having to rescale the whole drawing later.

Draw the house as a rectangle at its actual footprint size, positioned the measured distance from the front and side property lines — this is the anchor everything else gets measured against, so use your field measurements here, not a rough estimate from a photo. Add the garage, driveway, deck, shed, and any other existing features as rectangles and polygons. Snap-to-grid keeps edges aligned and dimensions honest instead of drifting a few inches per shape.

Then add the proposed work — the new fence line, the addition, the concrete pad — and make it visually distinct from existing structures with a label or a different line style. Anyone looking at the finished drawing, including a client with no construction background, should be able to tell instantly what already exists and what's being proposed.

Run dimension lines along the property boundaries, across structure widths, and — most importantly — on the setback distances from the proposed work to the property lines. Setbacks are usually the first thing a permitting office checks and the first thing a neighbor dispute centers on, so get those dimensions right and visible before anything else on the sheet.

Label each feature with clear text: "EXISTING HOUSE," "PROPOSED DECK," "GRAVEL DRIVE." Fill in the title block with the project name, client, your company, and the date. A drawing without a title block is hard to identify six months later when a related job comes up at the same address.

Export the finished plan as a PNG for embedding in proposals, or as a PDF for a standalone document — see how to create a contractor drawing PDF for a client for the specifics of preparing a client-ready export. Save the drawing itself, not just the export, so the next job at the same property — the fence after the deck, the shed after the fence — starts from a plan you've already made instead of from scratch.

One caution worth repeating clearly: a drawn site plan documents your measurements, it doesn't establish legal boundaries. Where boundary accuracy actually matters — a fence close to a property line, a permit application — use survey pins or a licensed surveyor, and confirm what your local permitting office accepts before submitting any drawing as part of an application.

Not every site plan needs the same level of detail. Use the table below as a starting point, and adjust based on what the specific job and jurisdiction actually require.

A handful of avoidable mistakes account for most of the rework and confusion that shows up after a site plan gets used for a quote or a permit application.