partner-contact/partner_street_number/views/res_partner.xml

<?xml version="1.0" encoding="UTF-8"?>
<odoo>

        <record id="view_partner_form" model="ir.ui.view">
            <field name="name">Add separate fields for street name and number</field>
            <field name="model">res.partner</field>
            <field name="inherit_id" ref="base.view_partner_form"/>
            <field name="arch" type="xml">
                <xpath expr="//div[@class='o_address_format']//field[@name='street']"
                       position="after">
                        <field name="street_name" class="o_address_street_name"
                                placeholder="Street..."
                                attrs="{'readonly': [('type', '=', 'contact'),('parent_id', '!=', False)]}"
                               />
                        <field name="street_number" class="o_address_street_number"
                                placeholder="Number..."
                                attrs="{'readonly': [('type', '=', 'contact'),('parent_id', '!=', False)]}"
                               />
                </xpath>
                <xpath expr="//div[@class='o_address_format']//field[@name='street']"
                       position="attributes">
                    <attribute name="invisible">1</attribute>
                </xpath>

                <xpath expr="//div[@name='div_address']//field[@name='street']"
                       position="after">
                        <field name="street_name" class="o_address_street_name"
                               placeholder="Street..."
                               />
                        <field name="street_number" class="o_address_street_number"
                               placeholder="Number..."
                               />
                </xpath>
                <xpath expr="//div[@name='div_address']//field[@name='street']"
                       position="attributes">
                    <attribute name="invisible">1</attribute>
                </xpath>

                <xpath expr="//field[@name='child_ids']" position="attributes">
                    <attribute name="context">{'default_parent_id': active_id, 'default_street_name': street_name, 'default_street_number': street_number, 'default_street2': street2, 'default_city': city, 'default_state_id': state_id, 'default_zip': zip, 'default_country_id': country_id, 'default_supplier': supplier, 'default_customer': customer}</attribute>
                </xpath>

            </field>
        </record>

        <record id="view_partner_address_form" model="ir.ui.view">
            <field name="name">Add separate fields for street name and number in address form</field>
            <field name="model">res.partner</field>
            <field name="inherit_id" ref="base.view_partner_address_form"/>
            <field name="arch" type="xml">
                <xpath expr="//div[@class='o_address_format']//field[@name='street']"
                       position="after">
                       <field name="street_name" class="o_address_street_name"
                                placeholder="Street..."
                               />
                       <field name="street_number" class="o_address_street_number"
                                placeholder="Number..."
                               />
                </xpath>
                <xpath expr="//div[@class='o_address_format']//field[@name='street']"
                       position="attributes">
                    <attribute name="invisible">1</attribute>
                </xpath>
            </field>
        </record>

</odoo>